/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 19:52:48,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 19:52:48,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 19:52:48,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 19:52:48,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 19:52:48,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 19:52:48,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 19:52:48,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 19:52:48,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 19:52:48,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 19:52:48,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 19:52:48,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 19:52:48,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 19:52:48,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 19:52:48,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 19:52:48,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 19:52:48,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 19:52:48,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 19:52:48,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 19:52:48,782 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 19:52:48,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 19:52:48,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 19:52:48,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 19:52:48,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 19:52:48,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 19:52:48,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 19:52:48,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 19:52:48,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 19:52:48,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 19:52:48,792 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 19:52:48,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 19:52:48,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 19:52:48,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 19:52:48,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 19:52:48,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 19:52:48,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 19:52:48,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 19:52:48,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 19:52:48,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 19:52:48,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 19:52:48,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 19:52:48,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-10-15 19:52:48,822 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 19:52:48,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 19:52:48,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 19:52:48,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 19:52:48,824 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 19:52:48,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 19:52:48,825 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 19:52:48,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 19:52:48,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 19:52:48,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 19:52:48,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 19:52:48,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 19:52:48,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 19:52:48,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 19:52:48,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 19:52:48,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 19:52:48,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 19:52:48,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 19:52:48,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 19:52:48,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 19:52:48,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 19:52:48,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 19:52:48,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 19:52:48,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 19:52:48,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 19:52:48,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 19:52:48,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 19:52:48,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 19:52:48,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 19:52:49,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 19:52:49,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 19:52:49,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 19:52:49,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 19:52:49,146 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 19:52:49,147 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-15 19:52:49,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377f703b6/4f199a501d134f4099b8e780390751ea/FLAG30a86eb56 [2020-10-15 19:52:49,646 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 19:52:49,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2020-10-15 19:52:49,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377f703b6/4f199a501d134f4099b8e780390751ea/FLAG30a86eb56 [2020-10-15 19:52:49,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377f703b6/4f199a501d134f4099b8e780390751ea [2020-10-15 19:52:49,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 19:52:49,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 19:52:49,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:49,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 19:52:49,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 19:52:49,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:49" (1/1) ... [2020-10-15 19:52:49,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@667f6c88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:49, skipping insertion in model container [2020-10-15 19:52:49,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:52:49" (1/1) ... [2020-10-15 19:52:49,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 19:52:50,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 19:52:50,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:50,545 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 19:52:50,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 19:52:50,685 INFO L208 MainTranslator]: Completed translation [2020-10-15 19:52:50,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50 WrapperNode [2020-10-15 19:52:50,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 19:52:50,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:50,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 19:52:50,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 19:52:50,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,738 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 19:52:50,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 19:52:50,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 19:52:50,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 19:52:50,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (1/1) ... [2020-10-15 19:52:50,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 19:52:50,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 19:52:50,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 19:52:50,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 19:52:50,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (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 [2020-10-15 19:52:50,920 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-15 19:52:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-15 19:52:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-15 19:52:50,921 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-15 19:52:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 19:52:50,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-15 19:52:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 19:52:50,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 19:52:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-15 19:52:50,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 19:52:50,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 19:52:50,926 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 19:52:51,224 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 19:52:51,225 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-15 19:52:51,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:51 BoogieIcfgContainer [2020-10-15 19:52:51,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 19:52:51,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 19:52:51,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 19:52:51,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 19:52:51,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:52:49" (1/3) ... [2020-10-15 19:52:51,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c373944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:51, skipping insertion in model container [2020-10-15 19:52:51,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:52:50" (2/3) ... [2020-10-15 19:52:51,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c373944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:52:51, skipping insertion in model container [2020-10-15 19:52:51,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:52:51" (3/3) ... [2020-10-15 19:52:51,241 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-10-15 19:52:51,261 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 19:52:51,261 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 19:52:51,280 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 19:52:51,285 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 19:52:51,343 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,343 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,344 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,344 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,345 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,346 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,346 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,347 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,347 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,348 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,350 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,350 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,351 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,352 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,354 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,355 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,355 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,356 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,363 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,364 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,364 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,365 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,365 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,378 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,378 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,379 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,379 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,379 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,379 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 19:52:51,396 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-15 19:52:51,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 19:52:51,420 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 19:52:51,420 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 19:52:51,420 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 19:52:51,420 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 19:52:51,420 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 19:52:51,420 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 19:52:51,421 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 19:52:51,433 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 19:52:51,436 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,439 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,441 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-15 19:52:51,506 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-15 19:52:51,506 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-15 19:52:51,511 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-15 19:52:51,514 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-15 19:52:52,602 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-15 19:52:52,705 INFO L132 LiptonReduction]: Checked pairs total: 943 [2020-10-15 19:52:52,705 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-15 19:52:52,712 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-15 19:52:52,724 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-15 19:52:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-15 19:52:52,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 19:52:52,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:52,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-15 19:52:52,736 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:52,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-10-15 19:52:52,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:52,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423715502] [2020-10-15 19:52:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:52,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423715502] [2020-10-15 19:52:52,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:52,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 19:52:52,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168274819] [2020-10-15 19:52:52,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 19:52:52,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:52,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 19:52:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 19:52:52,992 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-15 19:52:53,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,065 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-15 19:52:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:52:53,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-15 19:52:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,080 INFO L225 Difference]: With dead ends: 83 [2020-10-15 19:52:53,080 INFO L226 Difference]: Without dead ends: 54 [2020-10-15 19:52:53,082 INFO L677 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 [2020-10-15 19:52:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-15 19:52:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-15 19:52:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-15 19:52:53,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-15 19:52:53,127 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-15 19:52:53,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,127 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-15 19:52:53,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 19:52:53,128 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-15 19:52:53,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 19:52:53,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,130 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-10-15 19:52:53,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879798288] [2020-10-15 19:52:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879798288] [2020-10-15 19:52:53,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261545866] [2020-10-15 19:52:53,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,258 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-15 19:52:53,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,319 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-15 19:52:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:53,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,321 INFO L225 Difference]: With dead ends: 80 [2020-10-15 19:52:53,321 INFO L226 Difference]: Without dead ends: 75 [2020-10-15 19:52:53,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-15 19:52:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-15 19:52:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-15 19:52:53,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-15 19:52:53,332 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-15 19:52:53,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,334 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-15 19:52:53,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-15 19:52:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 19:52:53,336 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,336 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-10-15 19:52:53,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102368006] [2020-10-15 19:52:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102368006] [2020-10-15 19:52:53,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471697125] [2020-10-15 19:52:53,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,452 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-15 19:52:53,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,505 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-15 19:52:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 19:52:53,508 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,509 INFO L225 Difference]: With dead ends: 73 [2020-10-15 19:52:53,509 INFO L226 Difference]: Without dead ends: 70 [2020-10-15 19:52:53,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-15 19:52:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-15 19:52:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-15 19:52:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-15 19:52:53,519 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-15 19:52:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,520 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-15 19:52:53,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-15 19:52:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 19:52:53,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 19:52:53,522 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,522 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-10-15 19:52:53,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758897723] [2020-10-15 19:52:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758897723] [2020-10-15 19:52:53,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:53,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 19:52:53,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063623242] [2020-10-15 19:52:53,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 19:52:53,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 19:52:53,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 19:52:53,584 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-15 19:52:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:53,645 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-15 19:52:53,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:53,646 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-15 19:52:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:53,647 INFO L225 Difference]: With dead ends: 86 [2020-10-15 19:52:53,648 INFO L226 Difference]: Without dead ends: 80 [2020-10-15 19:52:53,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-15 19:52:53,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-15 19:52:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-15 19:52:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-15 19:52:53,658 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-15 19:52:53,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:53,658 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-15 19:52:53,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 19:52:53,658 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-15 19:52:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:53,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:53,660 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:53,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 19:52:53,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-10-15 19:52:53,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:53,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611224702] [2020-10-15 19:52:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611224702] [2020-10-15 19:52:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950940889] [2020-10-15 19:52:53,753 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 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 [2020-10-15 19:52:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:53,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:53,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:52:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:53,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:53,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-15 19:52:53,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020748164] [2020-10-15 19:52:53,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 19:52:53,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 19:52:53,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:52:53,944 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-15 19:52:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:54,018 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-15 19:52:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:54,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-15 19:52:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:54,020 INFO L225 Difference]: With dead ends: 101 [2020-10-15 19:52:54,021 INFO L226 Difference]: Without dead ends: 96 [2020-10-15 19:52:54,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-15 19:52:54,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-15 19:52:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-15 19:52:54,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-15 19:52:54,029 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-15 19:52:54,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:54,030 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-15 19:52:54,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 19:52:54,030 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-15 19:52:54,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:54,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:54,031 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:54,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,245 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-10-15 19:52:54,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:54,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823608016] [2020-10-15 19:52:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823608016] [2020-10-15 19:52:54,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557921063] [2020-10-15 19:52:54,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:52:54,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:54,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:54,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:54,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:54,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241272959] [2020-10-15 19:52:54,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:54,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:54,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,468 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-15 19:52:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:54,497 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-15 19:52:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:52:54,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:54,498 INFO L225 Difference]: With dead ends: 84 [2020-10-15 19:52:54,499 INFO L226 Difference]: Without dead ends: 81 [2020-10-15 19:52:54,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-15 19:52:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-15 19:52:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-15 19:52:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-15 19:52:54,506 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-15 19:52:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:54,507 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-15 19:52:54,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-15 19:52:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:54,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:54,508 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:54,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:54,722 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:54,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-10-15 19:52:54,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:54,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636893462] [2020-10-15 19:52:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:54,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636893462] [2020-10-15 19:52:54,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114076604] [2020-10-15 19:52:54,822 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 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 [2020-10-15 19:52:54,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:52:54,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:54,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:54,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:54,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:54,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168320003] [2020-10-15 19:52:54,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:54,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:54,979 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-15 19:52:55,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,044 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-15 19:52:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:55,045 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:55,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,046 INFO L225 Difference]: With dead ends: 90 [2020-10-15 19:52:55,046 INFO L226 Difference]: Without dead ends: 87 [2020-10-15 19:52:55,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-15 19:52:55,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-15 19:52:55,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-15 19:52:55,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-15 19:52:55,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-15 19:52:55,062 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-15 19:52:55,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,062 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-15 19:52:55,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:55,063 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-15 19:52:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-15 19:52:55,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:55,279 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-10-15 19:52:55,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443384942] [2020-10-15 19:52:55,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443384942] [2020-10-15 19:52:55,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573366930] [2020-10-15 19:52:55,347 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 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 [2020-10-15 19:52:55,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:55,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:55,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-15 19:52:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:55,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:52:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:55,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 19:52:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535649919] [2020-10-15 19:52:55,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 19:52:55,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 19:52:55,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:55,487 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-15 19:52:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,584 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-15 19:52:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:55,584 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-15 19:52:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,586 INFO L225 Difference]: With dead ends: 99 [2020-10-15 19:52:55,586 INFO L226 Difference]: Without dead ends: 93 [2020-10-15 19:52:55,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-15 19:52:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-15 19:52:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-15 19:52:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-15 19:52:55,593 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-15 19:52:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,593 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-15 19:52:55,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 19:52:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-15 19:52:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:55,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:55,810 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-10-15 19:52:55,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320379849] [2020-10-15 19:52:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320379849] [2020-10-15 19:52:55,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:55,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:55,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858853951] [2020-10-15 19:52:55,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:55,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:55,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,869 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-15 19:52:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:55,896 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-15 19:52:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 19:52:55,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:55,898 INFO L225 Difference]: With dead ends: 92 [2020-10-15 19:52:55,898 INFO L226 Difference]: Without dead ends: 90 [2020-10-15 19:52:55,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-15 19:52:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-15 19:52:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-15 19:52:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-15 19:52:55,905 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-15 19:52:55,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:55,905 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-15 19:52:55,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:55,906 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-15 19:52:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:55,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:55,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:55,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 19:52:55,907 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:55,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-10-15 19:52:55,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:55,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517780692] [2020-10-15 19:52:55,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:55,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517780692] [2020-10-15 19:52:55,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:55,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:55,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523188352] [2020-10-15 19:52:55,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:55,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:55,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:55,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:55,979 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-15 19:52:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,021 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-15 19:52:56,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:56,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,023 INFO L225 Difference]: With dead ends: 100 [2020-10-15 19:52:56,023 INFO L226 Difference]: Without dead ends: 98 [2020-10-15 19:52:56,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-15 19:52:56,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-15 19:52:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-15 19:52:56,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-15 19:52:56,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-15 19:52:56,029 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-15 19:52:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,030 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-15 19:52:56,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:56,030 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-15 19:52:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 19:52:56,032 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-10-15 19:52:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751152141] [2020-10-15 19:52:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751152141] [2020-10-15 19:52:56,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:56,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:56,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259124195] [2020-10-15 19:52:56,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:56,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:56,101 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-15 19:52:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,189 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:52:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:56,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,190 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:52:56,191 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:52:56,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:52:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:52:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:52:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-15 19:52:56,199 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-15 19:52:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,199 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-15 19:52:56,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-15 19:52:56,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 19:52:56,202 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-10-15 19:52:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191736078] [2020-10-15 19:52:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191736078] [2020-10-15 19:52:56,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 19:52:56,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 19:52:56,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726269839] [2020-10-15 19:52:56,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 19:52:56,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 19:52:56,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-15 19:52:56,269 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-15 19:52:56,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,349 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-15 19:52:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:56,349 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-15 19:52:56,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,350 INFO L225 Difference]: With dead ends: 105 [2020-10-15 19:52:56,350 INFO L226 Difference]: Without dead ends: 100 [2020-10-15 19:52:56,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 19:52:56,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-15 19:52:56,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-15 19:52:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-15 19:52:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-15 19:52:56,357 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-15 19:52:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,357 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-15 19:52:56,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 19:52:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-15 19:52:56,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,358 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 19:52:56,359 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-10-15 19:52:56,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679123088] [2020-10-15 19:52:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679123088] [2020-10-15 19:52:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159956605] [2020-10-15 19:52:56,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:52:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:56,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:56,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:56,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:52:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:56,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:56,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-15 19:52:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324889360] [2020-10-15 19:52:56,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 19:52:56,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:56,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 19:52:56,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:56,621 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-15 19:52:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:56,732 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-15 19:52:56,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:52:56,732 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-15 19:52:56,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:56,733 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:52:56,734 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:52:56,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:52:56,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:52:56,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-15 19:52:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-15 19:52:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-15 19:52:56,739 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-15 19:52:56,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:56,739 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-15 19:52:56,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 19:52:56,740 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-15 19:52:56,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:56,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:56,740 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:56,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-15 19:52:56,954 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-10-15 19:52:56,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:56,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998992346] [2020-10-15 19:52:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998992346] [2020-10-15 19:52:57,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559938240] [2020-10-15 19:52:57,032 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 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 [2020-10-15 19:52:57,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:52:57,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:57,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:57,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478846736] [2020-10-15 19:52:57,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,158 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-15 19:52:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:57,203 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-15 19:52:57,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:57,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:57,205 INFO L225 Difference]: With dead ends: 108 [2020-10-15 19:52:57,205 INFO L226 Difference]: Without dead ends: 105 [2020-10-15 19:52:57,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-15 19:52:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-15 19:52:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-15 19:52:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-15 19:52:57,211 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-15 19:52:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:57,211 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-15 19:52:57,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-15 19:52:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:57,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:57,212 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:57,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:57,424 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-10-15 19:52:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528288695] [2020-10-15 19:52:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528288695] [2020-10-15 19:52:57,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031237695] [2020-10-15 19:52:57,496 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 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 [2020-10-15 19:52:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:57,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:57,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085050880] [2020-10-15 19:52:57,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:57,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:57,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:57,594 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-15 19:52:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:57,658 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-15 19:52:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:52:57,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:57,660 INFO L225 Difference]: With dead ends: 116 [2020-10-15 19:52:57,660 INFO L226 Difference]: Without dead ends: 113 [2020-10-15 19:52:57,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:52:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-15 19:52:57,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-15 19:52:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-15 19:52:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-15 19:52:57,667 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-15 19:52:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:57,668 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-15 19:52:57,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:57,668 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-15 19:52:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:57,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:57,669 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:57,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 19:52:57,870 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-10-15 19:52:57,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113131547] [2020-10-15 19:52:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:57,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113131547] [2020-10-15 19:52:57,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140748386] [2020-10-15 19:52:57,954 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 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 [2020-10-15 19:52:58,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:58,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:58,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:58,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:58,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:58,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636451605] [2020-10-15 19:52:58,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:58,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:58,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:58,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:58,109 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-15 19:52:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:58,210 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-15 19:52:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:52:58,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:58,212 INFO L225 Difference]: With dead ends: 115 [2020-10-15 19:52:58,212 INFO L226 Difference]: Without dead ends: 112 [2020-10-15 19:52:58,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-15 19:52:58,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-15 19:52:58,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:52:58,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-15 19:52:58,218 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-15 19:52:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:58,218 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-15 19:52:58,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-15 19:52:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-15 19:52:58,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:58,219 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:58,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-15 19:52:58,434 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:58,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-10-15 19:52:58,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:58,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537903177] [2020-10-15 19:52:58,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537903177] [2020-10-15 19:52:58,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785963677] [2020-10-15 19:52:58,492 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 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 [2020-10-15 19:52:58,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:52:58,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:58,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:58,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:52:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:58,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:58,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:58,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804914138] [2020-10-15 19:52:58,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:58,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:58,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:58,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:58,627 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-15 19:52:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:58,733 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-15 19:52:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:52:58,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-15 19:52:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:58,735 INFO L225 Difference]: With dead ends: 124 [2020-10-15 19:52:58,735 INFO L226 Difference]: Without dead ends: 118 [2020-10-15 19:52:58,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:52:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-15 19:52:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-15 19:52:58,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-15 19:52:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-15 19:52:58,741 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-15 19:52:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:58,741 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-15 19:52:58,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:58,741 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-15 19:52:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:58,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:58,742 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:58,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-15 19:52:58,956 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:58,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-10-15 19:52:58,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:58,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670629395] [2020-10-15 19:52:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670629395] [2020-10-15 19:52:59,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7162760] [2020-10-15 19:52:59,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:52:59,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:59,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:59,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:59,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265919988] [2020-10-15 19:52:59,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:59,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:59,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:59,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,204 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-15 19:52:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:59,256 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-15 19:52:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 19:52:59,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:52:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:59,258 INFO L225 Difference]: With dead ends: 113 [2020-10-15 19:52:59,258 INFO L226 Difference]: Without dead ends: 111 [2020-10-15 19:52:59,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-15 19:52:59,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-15 19:52:59,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-15 19:52:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-15 19:52:59,264 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-15 19:52:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:59,265 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-15 19:52:59,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:59,265 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-15 19:52:59,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:59,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:59,266 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:59,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-15 19:52:59,477 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-10-15 19:52:59,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:59,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539320815] [2020-10-15 19:52:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:52:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539320815] [2020-10-15 19:52:59,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122609115] [2020-10-15 19:52:59,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:52:59,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:52:59,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:52:59,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:52:59,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:52:59,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:52:59,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:52:59,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689447150] [2020-10-15 19:52:59,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:52:59,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:52:59,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:52:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:52:59,688 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-15 19:52:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:52:59,752 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-15 19:52:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:52:59,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:52:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:52:59,754 INFO L225 Difference]: With dead ends: 118 [2020-10-15 19:52:59,754 INFO L226 Difference]: Without dead ends: 116 [2020-10-15 19:52:59,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:52:59,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-15 19:52:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-15 19:52:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-15 19:52:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-15 19:52:59,759 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-15 19:52:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:52:59,759 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-15 19:52:59,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:52:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-15 19:52:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:52:59,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:52:59,760 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:52:59,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:52:59,970 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:52:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:52:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-10-15 19:52:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:52:59,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475472345] [2020-10-15 19:52:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:52:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475472345] [2020-10-15 19:53:00,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787201883] [2020-10-15 19:53:00,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:00,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672749168] [2020-10-15 19:53:00,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:00,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:00,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:00,178 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-15 19:53:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,264 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-15 19:53:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:00,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,266 INFO L225 Difference]: With dead ends: 119 [2020-10-15 19:53:00,266 INFO L226 Difference]: Without dead ends: 117 [2020-10-15 19:53:00,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-15 19:53:00,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-15 19:53:00,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-15 19:53:00,271 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-15 19:53:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,272 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-15 19:53:00,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-15 19:53:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:00,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,273 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,474 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-10-15 19:53:00,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813161303] [2020-10-15 19:53:00,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813161303] [2020-10-15 19:53:00,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97534841] [2020-10-15 19:53:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:00,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:00,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:00,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:00,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834277617] [2020-10-15 19:53:00,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:00,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:00,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:00,694 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-15 19:53:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:00,745 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-15 19:53:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:00,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:00,747 INFO L225 Difference]: With dead ends: 122 [2020-10-15 19:53:00,747 INFO L226 Difference]: Without dead ends: 120 [2020-10-15 19:53:00,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-15 19:53:00,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-15 19:53:00,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-15 19:53:00,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-15 19:53:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-15 19:53:00,752 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-15 19:53:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:00,752 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-15 19:53:00,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-15 19:53:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:00,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:00,753 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:00,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 19:53:00,964 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-10-15 19:53:00,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:00,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483140994] [2020-10-15 19:53:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483140994] [2020-10-15 19:53:01,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273246607] [2020-10-15 19:53:01,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:01,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025765401] [2020-10-15 19:53:01,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:01,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:01,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:01,140 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:01,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,245 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-15 19:53:01,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:01,246 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:01,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,247 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:01,247 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:01,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-15 19:53:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-15 19:53:01,252 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-15 19:53:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,252 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-15 19:53:01,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-15 19:53:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:01,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,253 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:01,454 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-10-15 19:53:01,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354762714] [2020-10-15 19:53:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354762714] [2020-10-15 19:53:01,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488150657] [2020-10-15 19:53:01,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:01,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:01,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:01,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:01,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:01,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:01,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477487084] [2020-10-15 19:53:01,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:01,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:01,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:01,643 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-15 19:53:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:01,714 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-15 19:53:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:01,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:01,715 INFO L225 Difference]: With dead ends: 123 [2020-10-15 19:53:01,715 INFO L226 Difference]: Without dead ends: 121 [2020-10-15 19:53:01,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-15 19:53:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-15 19:53:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-15 19:53:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-15 19:53:01,720 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-15 19:53:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:01,720 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-15 19:53:01,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:01,721 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-15 19:53:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:01,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:01,723 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:01,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-15 19:53:01,924 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:01,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-10-15 19:53:01,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:01,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236992985] [2020-10-15 19:53:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:01,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236992985] [2020-10-15 19:53:01,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521951150] [2020-10-15 19:53:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:02,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:02,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638508149] [2020-10-15 19:53:02,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:02,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:02,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:02,137 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-15 19:53:02,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,313 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-15 19:53:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:02,314 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,315 INFO L225 Difference]: With dead ends: 133 [2020-10-15 19:53:02,315 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:02,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:02,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-15 19:53:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-15 19:53:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-15 19:53:02,320 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-15 19:53:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,320 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-15 19:53:02,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-15 19:53:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:02,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,321 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:02,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,533 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:02,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-10-15 19:53:02,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:02,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358288551] [2020-10-15 19:53:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358288551] [2020-10-15 19:53:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452414505] [2020-10-15 19:53:02,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:02,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:02,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:02,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:02,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:02,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381745978] [2020-10-15 19:53:02,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:02,709 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:02,826 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-15 19:53:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:02,826 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:02,828 INFO L225 Difference]: With dead ends: 127 [2020-10-15 19:53:02,828 INFO L226 Difference]: Without dead ends: 125 [2020-10-15 19:53:02,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-15 19:53:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-15 19:53:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:02,832 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:02,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:02,832 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:02,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:02,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:02,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:02,833 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-15 19:53:03,034 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-10-15 19:53:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297582520] [2020-10-15 19:53:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297582520] [2020-10-15 19:53:03,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682952557] [2020-10-15 19:53:03,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:03,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529856112] [2020-10-15 19:53:03,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:03,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:03,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:03,203 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:03,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:03,450 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-15 19:53:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:03,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:03,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:03,451 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:03,451 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:03,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-15 19:53:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-15 19:53:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-15 19:53:03,456 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-15 19:53:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:03,456 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-15 19:53:03,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-15 19:53:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:03,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:03,457 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:03,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-15 19:53:03,669 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:03,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-10-15 19:53:03,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:03,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960066426] [2020-10-15 19:53:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960066426] [2020-10-15 19:53:03,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875758590] [2020-10-15 19:53:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:03,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:03,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:03,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:03,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:03,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199391396] [2020-10-15 19:53:03,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:03,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:03,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:03,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:03,900 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-15 19:53:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,046 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-15 19:53:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:04,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,047 INFO L225 Difference]: With dead ends: 136 [2020-10-15 19:53:04,047 INFO L226 Difference]: Without dead ends: 131 [2020-10-15 19:53:04,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-15 19:53:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-15 19:53:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-15 19:53:04,052 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-15 19:53:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,055 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-15 19:53:04,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-15 19:53:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:04,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-15 19:53:04,268 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-10-15 19:53:04,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447034672] [2020-10-15 19:53:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447034672] [2020-10-15 19:53:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528380644] [2020-10-15 19:53:04,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:04,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962583667] [2020-10-15 19:53:04,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,437 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-15 19:53:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:04,521 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-15 19:53:04,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:04,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:04,522 INFO L225 Difference]: With dead ends: 130 [2020-10-15 19:53:04,523 INFO L226 Difference]: Without dead ends: 128 [2020-10-15 19:53:04,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-15 19:53:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-15 19:53:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:04,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:04,527 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:04,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:04,528 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:04,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-15 19:53:04,729 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:04,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:04,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-10-15 19:53:04,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:04,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867163305] [2020-10-15 19:53:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867163305] [2020-10-15 19:53:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224561404] [2020-10-15 19:53:04,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:04,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:04,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:04,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:04,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202817842] [2020-10-15 19:53:04,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:04,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:04,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:04,900 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:05,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,024 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-15 19:53:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:05,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:05,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,025 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:05,026 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:05,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:05,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-15 19:53:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:05,030 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:05,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,030 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:05,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,030 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:05,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,031 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-15 19:53:05,232 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-10-15 19:53:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187812412] [2020-10-15 19:53:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187812412] [2020-10-15 19:53:05,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475568434] [2020-10-15 19:53:05,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:05,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678994706] [2020-10-15 19:53:05,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,415 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:05,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:05,545 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-15 19:53:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:05,545 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:05,547 INFO L225 Difference]: With dead ends: 131 [2020-10-15 19:53:05,547 INFO L226 Difference]: Without dead ends: 126 [2020-10-15 19:53:05,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-15 19:53:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-15 19:53:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-15 19:53:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-15 19:53:05,552 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-15 19:53:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:05,552 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-15 19:53:05,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-15 19:53:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:05,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:05,553 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:05,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,766 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-10-15 19:53:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:05,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937497935] [2020-10-15 19:53:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:05,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937497935] [2020-10-15 19:53:05,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102425674] [2020-10-15 19:53:05,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:05,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:05,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:05,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:05,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:05,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:05,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96438741] [2020-10-15 19:53:05,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:05,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:05,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:05,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:05,915 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-15 19:53:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,141 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-15 19:53:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:06,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,144 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:06,144 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:06,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-15 19:53:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-15 19:53:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-15 19:53:06,149 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-15 19:53:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,149 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-15 19:53:06,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-15 19:53:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,150 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-15 19:53:06,362 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-10-15 19:53:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448199430] [2020-10-15 19:53:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448199430] [2020-10-15 19:53:06,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110587776] [2020-10-15 19:53:06,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 19:53:06,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:06,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:06,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 19:53:06,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264831403] [2020-10-15 19:53:06,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:53:06,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:53:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:53:06,534 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-15 19:53:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:06,727 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-15 19:53:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:06,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-15 19:53:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:06,729 INFO L225 Difference]: With dead ends: 135 [2020-10-15 19:53:06,729 INFO L226 Difference]: Without dead ends: 130 [2020-10-15 19:53:06,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-15 19:53:06,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-15 19:53:06,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-15 19:53:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-15 19:53:06,734 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-15 19:53:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:06,734 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-15 19:53:06,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:53:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-15 19:53:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:06,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:06,735 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:06,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:06,936 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-10-15 19:53:06,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:06,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177932366] [2020-10-15 19:53:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:06,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177932366] [2020-10-15 19:53:06,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833666064] [2020-10-15 19:53:06,997 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 [2020-10-15 19:53:07,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-15 19:53:07,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926785861] [2020-10-15 19:53:07,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 19:53:07,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 19:53:07,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:07,141 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-15 19:53:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,263 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-15 19:53:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:07,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-15 19:53:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,265 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:07,265 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:07,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-15 19:53:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-15 19:53:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-15 19:53:07,270 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-15 19:53:07,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,270 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-15 19:53:07,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 19:53:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-15 19:53:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,271 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-15 19:53:07,483 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-10-15 19:53:07,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515262099] [2020-10-15 19:53:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515262099] [2020-10-15 19:53:07,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593479528] [2020-10-15 19:53:07,582 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 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 [2020-10-15 19:53:07,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:07,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:07,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:07,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735582281] [2020-10-15 19:53:07,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:07,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:07,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,724 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-15 19:53:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:07,768 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-15 19:53:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:07,768 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:07,769 INFO L225 Difference]: With dead ends: 132 [2020-10-15 19:53:07,769 INFO L226 Difference]: Without dead ends: 129 [2020-10-15 19:53:07,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:07,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-15 19:53:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-15 19:53:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:07,773 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:07,774 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:07,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:07,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:07,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:07,775 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:07,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-15 19:53:07,987 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-10-15 19:53:07,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:07,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640795363] [2020-10-15 19:53:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640795363] [2020-10-15 19:53:08,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320570673] [2020-10-15 19:53:08,065 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 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 [2020-10-15 19:53:08,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:08,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:08,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038673783] [2020-10-15 19:53:08,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:08,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,196 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:08,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,251 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-15 19:53:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:08,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,252 INFO L225 Difference]: With dead ends: 143 [2020-10-15 19:53:08,253 INFO L226 Difference]: Without dead ends: 140 [2020-10-15 19:53:08,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-15 19:53:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-15 19:53:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-15 19:53:08,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-15 19:53:08,257 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-15 19:53:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,257 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-15 19:53:08,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-15 19:53:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,260 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-15 19:53:08,473 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-10-15 19:53:08,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114964654] [2020-10-15 19:53:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114964654] [2020-10-15 19:53:08,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441866980] [2020-10-15 19:53:08,542 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 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 [2020-10-15 19:53:08,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:08,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:08,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:08,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:08,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:08,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101672871] [2020-10-15 19:53:08,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:08,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:08,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:08,675 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-15 19:53:08,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:08,759 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-15 19:53:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:08,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:08,761 INFO L225 Difference]: With dead ends: 142 [2020-10-15 19:53:08,761 INFO L226 Difference]: Without dead ends: 139 [2020-10-15 19:53:08,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:08,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-15 19:53:08,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-15 19:53:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-15 19:53:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-15 19:53:08,767 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-15 19:53:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:08,767 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-15 19:53:08,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-15 19:53:08,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:08,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:08,768 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:08,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-15 19:53:08,981 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-10-15 19:53:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:08,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091395832] [2020-10-15 19:53:08,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091395832] [2020-10-15 19:53:09,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180369206] [2020-10-15 19:53:09,060 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 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 [2020-10-15 19:53:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37424970] [2020-10-15 19:53:09,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:09,195 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-15 19:53:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,296 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-15 19:53:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:09,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,298 INFO L225 Difference]: With dead ends: 141 [2020-10-15 19:53:09,298 INFO L226 Difference]: Without dead ends: 138 [2020-10-15 19:53:09,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-15 19:53:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-15 19:53:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:09,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-15 19:53:09,302 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-15 19:53:09,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,303 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-15 19:53:09,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-15 19:53:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 19:53:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,304 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:09,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-15 19:53:09,512 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:09,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:09,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-10-15 19:53:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:09,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880358449] [2020-10-15 19:53:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880358449] [2020-10-15 19:53:09,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181960572] [2020-10-15 19:53:09,578 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 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 [2020-10-15 19:53:09,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:09,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:09,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:09,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:09,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558955316] [2020-10-15 19:53:09,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:09,741 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:09,884 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:09,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-15 19:53:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:09,887 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:09,887 INFO L226 Difference]: Without dead ends: 144 [2020-10-15 19:53:09,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-15 19:53:09,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-15 19:53:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-15 19:53:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-15 19:53:09,891 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-15 19:53:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:09,892 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-15 19:53:09,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-15 19:53:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:09,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:09,893 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,106 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-10-15 19:53:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151703337] [2020-10-15 19:53:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151703337] [2020-10-15 19:53:10,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004653248] [2020-10-15 19:53:10,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069123353] [2020-10-15 19:53:10,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:10,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,324 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-15 19:53:10,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,377 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-15 19:53:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 19:53:10,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:10,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,379 INFO L225 Difference]: With dead ends: 138 [2020-10-15 19:53:10,380 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 19:53:10,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 19:53:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-15 19:53:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-15 19:53:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-15 19:53:10,384 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-15 19:53:10,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,384 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-15 19:53:10,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-15 19:53:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:10,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,385 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:10,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-15 19:53:10,597 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-10-15 19:53:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155339413] [2020-10-15 19:53:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155339413] [2020-10-15 19:53:10,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811852920] [2020-10-15 19:53:10,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:10,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:10,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:10,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:10,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619206635] [2020-10-15 19:53:10,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:10,802 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:10,904 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-15 19:53:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:10,905 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:10,906 INFO L225 Difference]: With dead ends: 145 [2020-10-15 19:53:10,906 INFO L226 Difference]: Without dead ends: 143 [2020-10-15 19:53:10,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:10,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-15 19:53:10,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-15 19:53:10,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-15 19:53:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-15 19:53:10,911 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-15 19:53:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:10,911 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-15 19:53:10,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:10,911 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-15 19:53:10,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:10,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:10,912 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-15 19:53:11,123 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-10-15 19:53:11,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665417487] [2020-10-15 19:53:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665417487] [2020-10-15 19:53:11,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332436802] [2020-10-15 19:53:11,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:11,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:11,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:11,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660922487] [2020-10-15 19:53:11,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:11,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:11,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:11,315 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-15 19:53:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,442 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-15 19:53:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,443 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,444 INFO L225 Difference]: With dead ends: 150 [2020-10-15 19:53:11,444 INFO L226 Difference]: Without dead ends: 148 [2020-10-15 19:53:11,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-15 19:53:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-15 19:53:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-15 19:53:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-15 19:53:11,448 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-15 19:53:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:11,449 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-15 19:53:11,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:11,449 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-15 19:53:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:11,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:11,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:11,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,659 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:11,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:11,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-10-15 19:53:11,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:11,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938796582] [2020-10-15 19:53:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938796582] [2020-10-15 19:53:11,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674163688] [2020-10-15 19:53:11,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:11,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:11,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:11,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:11,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:11,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:11,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969046036] [2020-10-15 19:53:11,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:11,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:11,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:11,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:11,881 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:11,995 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-15 19:53:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:11,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:11,997 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:11,997 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:11,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-15 19:53:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:12,002 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:12,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,002 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:12,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:12,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,003 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-15 19:53:12,215 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-10-15 19:53:12,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480938153] [2020-10-15 19:53:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480938153] [2020-10-15 19:53:12,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468874474] [2020-10-15 19:53:12,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:12,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:12,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:12,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110910788] [2020-10-15 19:53:12,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:12,415 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:12,537 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-15 19:53:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:12,538 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:12,539 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:12,539 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:12,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:12,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-15 19:53:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-15 19:53:12,544 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-15 19:53:12,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:12,544 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-15 19:53:12,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:12,544 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-15 19:53:12,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:12,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:12,545 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:12,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,757 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:12,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:12,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-10-15 19:53:12,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:12,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353612438] [2020-10-15 19:53:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:12,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353612438] [2020-10-15 19:53:12,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407238063] [2020-10-15 19:53:12,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:12,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:12,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:12,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:12,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:12,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179633743] [2020-10-15 19:53:12,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:12,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:12,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:12,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:12,977 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-15 19:53:13,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,038 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-15 19:53:13,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:13,038 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:13,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,039 INFO L225 Difference]: With dead ends: 152 [2020-10-15 19:53:13,039 INFO L226 Difference]: Without dead ends: 150 [2020-10-15 19:53:13,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-15 19:53:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-15 19:53:13,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-15 19:53:13,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:13,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-15 19:53:13,042 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-15 19:53:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,043 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-15 19:53:13,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:13,043 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-15 19:53:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:13,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-15 19:53:13,247 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,247 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-10-15 19:53:13,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266793370] [2020-10-15 19:53:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266793370] [2020-10-15 19:53:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410447105] [2020-10-15 19:53:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:13,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:13,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:13,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:13,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644819036] [2020-10-15 19:53:13,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:13,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:13,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:13,471 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-15 19:53:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:13,612 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-15 19:53:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:13,615 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:13,616 INFO L225 Difference]: With dead ends: 153 [2020-10-15 19:53:13,616 INFO L226 Difference]: Without dead ends: 151 [2020-10-15 19:53:13,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:13,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-15 19:53:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-15 19:53:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-15 19:53:13,620 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-15 19:53:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:13,620 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-15 19:53:13,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:13,620 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-15 19:53:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:13,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:13,621 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:13,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-15 19:53:13,823 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:13,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-10-15 19:53:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237923406] [2020-10-15 19:53:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:13,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237923406] [2020-10-15 19:53:13,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666619857] [2020-10-15 19:53:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:13,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:13,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:13,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:13,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:14,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603268082] [2020-10-15 19:53:14,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:14,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:14,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,024 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-15 19:53:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,174 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:14,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,176 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:14,176 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:14,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:14,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-15 19:53:14,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:14,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-15 19:53:14,181 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-15 19:53:14,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,181 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-15 19:53:14,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,181 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-15 19:53:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:14,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,182 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-15 19:53:14,386 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-10-15 19:53:14,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099159298] [2020-10-15 19:53:14,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099159298] [2020-10-15 19:53:14,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883348738] [2020-10-15 19:53:14,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:14,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:14,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:14,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693657881] [2020-10-15 19:53:14,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:14,617 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:14,692 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-15 19:53:14,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:14,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:14,694 INFO L225 Difference]: With dead ends: 148 [2020-10-15 19:53:14,694 INFO L226 Difference]: Without dead ends: 146 [2020-10-15 19:53:14,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-15 19:53:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-15 19:53:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:14,698 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:14,699 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:14,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:14,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:14,699 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:14,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-15 19:53:14,910 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:14,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-10-15 19:53:14,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:14,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009644299] [2020-10-15 19:53:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:14,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009644299] [2020-10-15 19:53:14,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300395136] [2020-10-15 19:53:14,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239272202] [2020-10-15 19:53:15,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,125 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,271 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-15 19:53:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:15,272 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,273 INFO L225 Difference]: With dead ends: 157 [2020-10-15 19:53:15,273 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:15,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:15,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-15 19:53:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-15 19:53:15,278 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-15 19:53:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,278 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-15 19:53:15,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-15 19:53:15,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:15,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,279 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:15,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,486 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:15,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-10-15 19:53:15,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:15,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123471856] [2020-10-15 19:53:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123471856] [2020-10-15 19:53:15,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957534404] [2020-10-15 19:53:15,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:15,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:15,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:15,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:15,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:15,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:15,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118164407] [2020-10-15 19:53:15,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:15,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:15,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:15,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:15,694 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-10-15 19:53:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:15,795 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-15 19:53:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:15,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:15,797 INFO L225 Difference]: With dead ends: 149 [2020-10-15 19:53:15,797 INFO L226 Difference]: Without dead ends: 147 [2020-10-15 19:53:15,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-15 19:53:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-15 19:53:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:15,800 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:15,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:15,800 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:15,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:15,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:15,801 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-15 19:53:16,007 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-10-15 19:53:16,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044478867] [2020-10-15 19:53:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044478867] [2020-10-15 19:53:16,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527092487] [2020-10-15 19:53:16,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255026366] [2020-10-15 19:53:16,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,211 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:16,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:16,450 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-15 19:53:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:16,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:16,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:16,452 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:16,453 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:16,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:16,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-15 19:53:16,457 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-15 19:53:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:16,457 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-15 19:53:16,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-15 19:53:16,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:16,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:16,458 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:16,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-15 19:53:16,659 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:16,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:16,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-10-15 19:53:16,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:16,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082057931] [2020-10-15 19:53:16,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:16,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082057931] [2020-10-15 19:53:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291532511] [2020-10-15 19:53:16,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:16,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:16,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:16,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:16,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:16,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240642661] [2020-10-15 19:53:16,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:16,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:16,903 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:17,133 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:17,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:17,134 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:17,135 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:17,136 INFO L226 Difference]: Without dead ends: 154 [2020-10-15 19:53:17,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-15 19:53:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-15 19:53:17,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:17,141 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:17,141 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:17,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:17,142 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:17,143 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:17,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,355 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:17,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-10-15 19:53:17,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:17,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039640402] [2020-10-15 19:53:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039640402] [2020-10-15 19:53:17,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179492956] [2020-10-15 19:53:17,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:17,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:17,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:17,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:17,606 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:17,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:17,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:17,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913548173] [2020-10-15 19:53:17,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:17,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:17,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:17,664 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,001 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-15 19:53:18,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:18,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,003 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:18,003 INFO L226 Difference]: Without dead ends: 171 [2020-10-15 19:53:18,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:53:18,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-15 19:53:18,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-15 19:53:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 19:53:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-15 19:53:18,009 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-15 19:53:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,009 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-15 19:53:18,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-15 19:53:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,010 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-15 19:53:18,215 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-10-15 19:53:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648610570] [2020-10-15 19:53:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648610570] [2020-10-15 19:53:18,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058442109] [2020-10-15 19:53:18,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:18,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:18,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:18,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:18,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243715298] [2020-10-15 19:53:18,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:18,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:18,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:18,435 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-15 19:53:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:18,669 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-15 19:53:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:18,670 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:18,671 INFO L225 Difference]: With dead ends: 166 [2020-10-15 19:53:18,671 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:18,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:18,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-15 19:53:18,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:18,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-15 19:53:18,675 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-15 19:53:18,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:18,675 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-15 19:53:18,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:18,675 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-15 19:53:18,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:18,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:18,676 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:18,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,882 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-10-15 19:53:18,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:18,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698182848] [2020-10-15 19:53:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698182848] [2020-10-15 19:53:18,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843687542] [2020-10-15 19:53:18,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:18,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283227249] [2020-10-15 19:53:19,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,070 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-15 19:53:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,241 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-15 19:53:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:19,241 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,243 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:19,243 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:19,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-15 19:53:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-15 19:53:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-15 19:53:19,247 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-15 19:53:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,248 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-15 19:53:19,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-15 19:53:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:19,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-15 19:53:19,459 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-10-15 19:53:19,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:19,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754649235] [2020-10-15 19:53:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754649235] [2020-10-15 19:53:19,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69615145] [2020-10-15 19:53:19,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:19,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:19,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:19,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:19,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135958457] [2020-10-15 19:53:19,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:19,673 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:19,923 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-15 19:53:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:19,924 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:19,925 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:19,926 INFO L226 Difference]: Without dead ends: 168 [2020-10-15 19:53:19,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-15 19:53:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-15 19:53:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-15 19:53:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-15 19:53:19,929 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-15 19:53:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:19,929 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-15 19:53:19,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-15 19:53:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:19,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:19,930 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:20,141 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-10-15 19:53:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010106454] [2020-10-15 19:53:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010106454] [2020-10-15 19:53:20,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945818351] [2020-10-15 19:53:20,198 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 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 [2020-10-15 19:53:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,306 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357882166] [2020-10-15 19:53:20,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,316 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-15 19:53:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:20,572 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-15 19:53:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:20,572 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:20,574 INFO L225 Difference]: With dead ends: 177 [2020-10-15 19:53:20,574 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:20,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:20,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-15 19:53:20,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-15 19:53:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-15 19:53:20,579 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-15 19:53:20,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:20,579 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-15 19:53:20,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-15 19:53:20,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:20,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:20,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:20,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-15 19:53:20,792 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:20,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-10-15 19:53:20,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:20,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299511200] [2020-10-15 19:53:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299511200] [2020-10-15 19:53:20,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532935722] [2020-10-15 19:53:20,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:20,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:20,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:20,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:20,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:20,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:20,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:20,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:20,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816320011] [2020-10-15 19:53:20,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:20,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:20,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:20,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:20,973 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-15 19:53:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:21,335 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-15 19:53:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:21,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:21,338 INFO L225 Difference]: With dead ends: 190 [2020-10-15 19:53:21,338 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:21,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:21,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-15 19:53:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:21,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-15 19:53:21,342 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-15 19:53:21,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:21,342 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-15 19:53:21,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:21,342 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-15 19:53:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:21,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:21,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:21,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-15 19:53:21,553 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-10-15 19:53:21,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:21,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362115648] [2020-10-15 19:53:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362115648] [2020-10-15 19:53:21,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442854286] [2020-10-15 19:53:21,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:21,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:21,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:21,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:21,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:21,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:21,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:21,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769496689] [2020-10-15 19:53:21,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:21,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:21,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:21,758 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-15 19:53:22,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,088 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-15 19:53:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:22,089 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,090 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:22,090 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:22,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:22,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-15 19:53:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-15 19:53:22,094 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-15 19:53:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,094 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-15 19:53:22,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-15 19:53:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,095 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-15 19:53:22,296 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-10-15 19:53:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846584490] [2020-10-15 19:53:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846584490] [2020-10-15 19:53:22,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031674670] [2020-10-15 19:53:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:22,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:22,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515722559] [2020-10-15 19:53:22,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:22,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:22,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:22,487 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-15 19:53:22,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:22,616 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-15 19:53:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:22,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:22,618 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:22,618 INFO L226 Difference]: Without dead ends: 162 [2020-10-15 19:53:22,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-15 19:53:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-15 19:53:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-15 19:53:22,622 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-15 19:53:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:22,622 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-15 19:53:22,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-15 19:53:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:22,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:22,623 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:22,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-15 19:53:22,823 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:22,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:22,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-10-15 19:53:22,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:22,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654593708] [2020-10-15 19:53:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:22,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654593708] [2020-10-15 19:53:22,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364841337] [2020-10-15 19:53:22,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:22,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:22,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:22,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120625409] [2020-10-15 19:53:23,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,018 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-15 19:53:23,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,183 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-15 19:53:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:23,184 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,185 INFO L225 Difference]: With dead ends: 161 [2020-10-15 19:53:23,185 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:23,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:23,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-15 19:53:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-15 19:53:23,190 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-15 19:53:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,190 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-15 19:53:23,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-15 19:53:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:23,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:23,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:23,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-15 19:53:23,402 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:23,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-10-15 19:53:23,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:23,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081846811] [2020-10-15 19:53:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081846811] [2020-10-15 19:53:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042495870] [2020-10-15 19:53:23,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:23,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:23,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:23,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:23,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:23,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142535709] [2020-10-15 19:53:23,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:23,626 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:23,875 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-15 19:53:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:23,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:23,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:23,876 INFO L225 Difference]: With dead ends: 165 [2020-10-15 19:53:23,876 INFO L226 Difference]: Without dead ends: 163 [2020-10-15 19:53:23,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-15 19:53:23,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-15 19:53:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-15 19:53:23,880 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-15 19:53:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:23,881 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-15 19:53:23,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-15 19:53:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:23,882 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-15 19:53:24,091 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-10-15 19:53:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958077388] [2020-10-15 19:53:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958077388] [2020-10-15 19:53:24,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417043591] [2020-10-15 19:53:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982169108] [2020-10-15 19:53:24,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,280 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-15 19:53:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:24,482 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-15 19:53:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:24,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:24,483 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:24,483 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:24,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:24,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-15 19:53:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:24,487 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:24,487 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:24,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:24,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:24,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:24,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,696 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-10-15 19:53:24,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:24,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639718267] [2020-10-15 19:53:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639718267] [2020-10-15 19:53:24,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704516685] [2020-10-15 19:53:24,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:24,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:24,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:24,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:24,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:24,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:24,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850707129] [2020-10-15 19:53:24,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:24,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:24,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:24,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:24,884 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,124 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-15 19:53:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:25,124 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,126 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:25,126 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:25,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:25,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-15 19:53:25,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:25,129 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:25,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,129 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:25,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,130 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,330 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-10-15 19:53:25,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432064571] [2020-10-15 19:53:25,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432064571] [2020-10-15 19:53:25,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177872066] [2020-10-15 19:53:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:25,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:25,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:25,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603452093] [2020-10-15 19:53:25,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:25,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:25,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:25,498 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:25,682 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-15 19:53:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:25,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:25,684 INFO L225 Difference]: With dead ends: 160 [2020-10-15 19:53:25,684 INFO L226 Difference]: Without dead ends: 155 [2020-10-15 19:53:25,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-15 19:53:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-15 19:53:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-15 19:53:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-15 19:53:25,687 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-15 19:53:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:25,688 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-15 19:53:25,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-15 19:53:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:25,689 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:25,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,897 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:25,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-10-15 19:53:25,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:25,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077595548] [2020-10-15 19:53:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:25,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077595548] [2020-10-15 19:53:25,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213442746] [2020-10-15 19:53:25,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:25,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:25,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746263933] [2020-10-15 19:53:26,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,098 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-15 19:53:26,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:26,450 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-15 19:53:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:26,451 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:26,452 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:26,452 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 19:53:26,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:26,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 19:53:26,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-15 19:53:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-15 19:53:26,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-15 19:53:26,457 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-15 19:53:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:26,457 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-15 19:53:26,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-15 19:53:26,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:26,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:26,458 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:26,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,660 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:26,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-10-15 19:53:26,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:26,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915293215] [2020-10-15 19:53:26,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915293215] [2020-10-15 19:53:26,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072728810] [2020-10-15 19:53:26,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:26,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:26,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:26,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:26,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:26,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:26,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:26,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437775316] [2020-10-15 19:53:26,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:26,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:26,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:26,855 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-15 19:53:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:27,094 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-15 19:53:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:53:27,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:27,096 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:27,096 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:27,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-15 19:53:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-15 19:53:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-15 19:53:27,099 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-15 19:53:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:27,099 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-15 19:53:27,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-15 19:53:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:27,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:27,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:27,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-15 19:53:27,301 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:27,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-10-15 19:53:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:27,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46560145] [2020-10-15 19:53:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46560145] [2020-10-15 19:53:27,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859058405] [2020-10-15 19:53:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:27,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:27,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:27,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:27,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:27,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:27,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156716497] [2020-10-15 19:53:27,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:27,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:27,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:27,490 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-15 19:53:27,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:27,829 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-15 19:53:27,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:27,830 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:27,831 INFO L225 Difference]: With dead ends: 192 [2020-10-15 19:53:27,831 INFO L226 Difference]: Without dead ends: 184 [2020-10-15 19:53:27,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:53:27,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-15 19:53:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-15 19:53:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-15 19:53:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-15 19:53:27,836 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-15 19:53:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:27,836 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-15 19:53:27,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-15 19:53:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:27,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:27,836 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:28,037 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-10-15 19:53:28,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492598056] [2020-10-15 19:53:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492598056] [2020-10-15 19:53:28,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592756396] [2020-10-15 19:53:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-15 19:53:28,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,199 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:28,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-15 19:53:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586451429] [2020-10-15 19:53:28,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 19:53:28,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 19:53:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-15 19:53:28,218 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-15 19:53:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:28,567 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-15 19:53:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:28,567 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-15 19:53:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:28,569 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:53:28,569 INFO L226 Difference]: Without dead ends: 175 [2020-10-15 19:53:28,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-15 19:53:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-15 19:53:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-15 19:53:28,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-15 19:53:28,573 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-15 19:53:28,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:28,574 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-15 19:53:28,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 19:53:28,574 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-15 19:53:28,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:28,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:28,574 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:28,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-15 19:53:28,777 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-10-15 19:53:28,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:28,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094568141] [2020-10-15 19:53:28,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094568141] [2020-10-15 19:53:28,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644211917] [2020-10-15 19:53:28,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:28,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:28,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:28,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:53:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732243083] [2020-10-15 19:53:29,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:53:29,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:53:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:29,005 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-15 19:53:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,147 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-15 19:53:29,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:29,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-15 19:53:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,149 INFO L225 Difference]: With dead ends: 164 [2020-10-15 19:53:29,149 INFO L226 Difference]: Without dead ends: 159 [2020-10-15 19:53:29,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-15 19:53:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-15 19:53:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-15 19:53:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-15 19:53:29,155 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-15 19:53:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,155 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-15 19:53:29,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:53:29,155 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-15 19:53:29,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,155 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:29,358 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-10-15 19:53:29,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299324573] [2020-10-15 19:53:29,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299324573] [2020-10-15 19:53:29,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693322015] [2020-10-15 19:53:29,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:29,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:29,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:29,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:29,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:29,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923172086] [2020-10-15 19:53:29,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:29,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:29,632 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-15 19:53:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:29,681 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-15 19:53:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:29,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:29,683 INFO L225 Difference]: With dead ends: 156 [2020-10-15 19:53:29,683 INFO L226 Difference]: Without dead ends: 153 [2020-10-15 19:53:29,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-15 19:53:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-15 19:53:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:29,688 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:29,688 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:29,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:29,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:29,689 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:29,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-15 19:53:29,899 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:29,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-10-15 19:53:29,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:29,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101363014] [2020-10-15 19:53:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101363014] [2020-10-15 19:53:30,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774300983] [2020-10-15 19:53:30,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:30,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:30,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379473147] [2020-10-15 19:53:30,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:30,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:30,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:30,185 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,250 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-15 19:53:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:30,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,251 INFO L225 Difference]: With dead ends: 170 [2020-10-15 19:53:30,252 INFO L226 Difference]: Without dead ends: 167 [2020-10-15 19:53:30,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-15 19:53:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-15 19:53:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-15 19:53:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-15 19:53:30,254 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-15 19:53:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,255 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-15 19:53:30,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-15 19:53:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,255 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:30,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,457 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:30,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-10-15 19:53:30,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:30,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244317195] [2020-10-15 19:53:30,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244317195] [2020-10-15 19:53:30,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322230939] [2020-10-15 19:53:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:30,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:30,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:30,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:30,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:30,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:30,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662729805] [2020-10-15 19:53:30,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:30,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:30,693 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-15 19:53:30,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:30,775 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-15 19:53:30,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:30,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:30,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:30,777 INFO L225 Difference]: With dead ends: 169 [2020-10-15 19:53:30,777 INFO L226 Difference]: Without dead ends: 166 [2020-10-15 19:53:30,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:30,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-15 19:53:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-15 19:53:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:53:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-15 19:53:30,780 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-15 19:53:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:30,780 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-15 19:53:30,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-15 19:53:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:30,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:30,781 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:30,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:30,986 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:30,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:30,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-10-15 19:53:30,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:30,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571155889] [2020-10-15 19:53:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571155889] [2020-10-15 19:53:31,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787545114] [2020-10-15 19:53:31,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:31,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:53:31,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:31,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7498001] [2020-10-15 19:53:31,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:31,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:31,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:31,217 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-15 19:53:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:31,324 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-15 19:53:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:31,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:31,325 INFO L225 Difference]: With dead ends: 168 [2020-10-15 19:53:31,326 INFO L226 Difference]: Without dead ends: 165 [2020-10-15 19:53:31,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:31,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-15 19:53:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-15 19:53:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-15 19:53:31,329 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-15 19:53:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:31,329 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-15 19:53:31,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-15 19:53:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:31,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:31,330 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:31,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-15 19:53:31,539 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:31,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-10-15 19:53:31,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:31,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858947458] [2020-10-15 19:53:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858947458] [2020-10-15 19:53:31,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946657626] [2020-10-15 19:53:31,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:31,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:31,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:31,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:31,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:31,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219189077] [2020-10-15 19:53:31,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:31,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:31,767 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-15 19:53:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:31,895 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-15 19:53:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:31,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:31,897 INFO L225 Difference]: With dead ends: 167 [2020-10-15 19:53:31,897 INFO L226 Difference]: Without dead ends: 164 [2020-10-15 19:53:31,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-15 19:53:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-15 19:53:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-15 19:53:31,901 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-15 19:53:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:31,901 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-15 19:53:31,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-15 19:53:31,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-15 19:53:31,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:31,902 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,113 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-10-15 19:53:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457094832] [2020-10-15 19:53:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457094832] [2020-10-15 19:53:32,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500390188] [2020-10-15 19:53:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:32,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:32,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330124051] [2020-10-15 19:53:32,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:32,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:32,331 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-15 19:53:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:32,508 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-15 19:53:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:32,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-15 19:53:32,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:32,510 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:32,510 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:32,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:32,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-15 19:53:32,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-15 19:53:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-15 19:53:32,514 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-15 19:53:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:32,514 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-15 19:53:32,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-15 19:53:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:32,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:32,515 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:32,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:32,723 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:32,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-10-15 19:53:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:32,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468429034] [2020-10-15 19:53:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468429034] [2020-10-15 19:53:32,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123351494] [2020-10-15 19:53:32,806 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 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 [2020-10-15 19:53:32,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:32,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:32,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:32,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:32,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:32,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423335103] [2020-10-15 19:53:32,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:32,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:32,979 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-15 19:53:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,026 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-15 19:53:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 19:53:33,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:33,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,028 INFO L225 Difference]: With dead ends: 163 [2020-10-15 19:53:33,028 INFO L226 Difference]: Without dead ends: 161 [2020-10-15 19:53:33,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-15 19:53:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-15 19:53:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-15 19:53:33,032 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-15 19:53:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,032 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-15 19:53:33,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-15 19:53:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:33,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,033 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:33,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-15 19:53:33,233 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:33,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-10-15 19:53:33,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:33,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086516223] [2020-10-15 19:53:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086516223] [2020-10-15 19:53:33,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498653319] [2020-10-15 19:53:33,319 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 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 [2020-10-15 19:53:33,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:33,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:33,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:33,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:33,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868886167] [2020-10-15 19:53:33,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:33,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:33,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:33,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:33,492 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:33,633 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-15 19:53:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:33,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:33,635 INFO L225 Difference]: With dead ends: 172 [2020-10-15 19:53:33,636 INFO L226 Difference]: Without dead ends: 170 [2020-10-15 19:53:33,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-15 19:53:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-15 19:53:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:33,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:33,639 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:33,639 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:33,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:33,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:33,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:33,639 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:33,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:33,840 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-10-15 19:53:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:33,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925522522] [2020-10-15 19:53:33,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:33,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925522522] [2020-10-15 19:53:33,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994787700] [2020-10-15 19:53:33,918 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 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 [2020-10-15 19:53:33,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:33,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:34,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:34,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:34,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19440990] [2020-10-15 19:53:34,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:34,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:34,651 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:34,836 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:34,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:34,838 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:34,838 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:34,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-15 19:53:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-15 19:53:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-15 19:53:34,841 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-15 19:53:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:34,841 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-15 19:53:34,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-15 19:53:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:34,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-15 19:53:35,042 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-10-15 19:53:35,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018556796] [2020-10-15 19:53:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018556796] [2020-10-15 19:53:35,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307016288] [2020-10-15 19:53:35,120 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 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 [2020-10-15 19:53:35,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889811447] [2020-10-15 19:53:35,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:35,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:35,272 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-15 19:53:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:35,463 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-15 19:53:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:35,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:35,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:35,465 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:35,465 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:35,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:35,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-15 19:53:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-15 19:53:35,470 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-15 19:53:35,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:35,470 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-15 19:53:35,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:35,470 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-15 19:53:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:35,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:35,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:35,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-15 19:53:35,682 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-10-15 19:53:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:35,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068312592] [2020-10-15 19:53:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068312592] [2020-10-15 19:53:35,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427887529] [2020-10-15 19:53:35,763 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 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 [2020-10-15 19:53:35,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:35,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:35,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:35,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:35,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:35,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:35,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359011298] [2020-10-15 19:53:35,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:35,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:35,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:35,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:35,900 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-15 19:53:36,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,089 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-15 19:53:36,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:36,090 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:36,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,092 INFO L225 Difference]: With dead ends: 184 [2020-10-15 19:53:36,092 INFO L226 Difference]: Without dead ends: 182 [2020-10-15 19:53:36,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-15 19:53:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-15 19:53:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:53:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-15 19:53:36,094 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-15 19:53:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,094 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-15 19:53:36,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-15 19:53:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,095 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-15 19:53:36,302 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-10-15 19:53:36,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46757924] [2020-10-15 19:53:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46757924] [2020-10-15 19:53:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570215295] [2020-10-15 19:53:36,382 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 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 [2020-10-15 19:53:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:36,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:36,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:36,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528801938] [2020-10-15 19:53:36,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:36,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:36,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:36,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:36,542 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-15 19:53:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:36,727 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-15 19:53:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:36,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:36,729 INFO L225 Difference]: With dead ends: 179 [2020-10-15 19:53:36,729 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:53:36,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:36,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:53:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-15 19:53:36,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-15 19:53:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-15 19:53:36,733 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-15 19:53:36,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:36,733 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-15 19:53:36,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-15 19:53:36,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:36,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:36,734 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:36,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:36,945 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-10-15 19:53:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:36,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97256451] [2020-10-15 19:53:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:36,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97256451] [2020-10-15 19:53:37,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4409367] [2020-10-15 19:53:37,035 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 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 [2020-10-15 19:53:37,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:37,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840074008] [2020-10-15 19:53:37,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,206 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-15 19:53:37,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:37,358 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-15 19:53:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:37,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:37,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:37,360 INFO L225 Difference]: With dead ends: 176 [2020-10-15 19:53:37,360 INFO L226 Difference]: Without dead ends: 174 [2020-10-15 19:53:37,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-15 19:53:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-15 19:53:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-15 19:53:37,363 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-15 19:53:37,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:37,363 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-15 19:53:37,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:37,364 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-15 19:53:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:37,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:37,364 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:37,565 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-10-15 19:53:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:37,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763106645] [2020-10-15 19:53:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:37,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763106645] [2020-10-15 19:53:37,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472356432] [2020-10-15 19:53:37,650 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 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 [2020-10-15 19:53:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:53:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:37,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:37,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761944589] [2020-10-15 19:53:37,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:37,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:37,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:37,802 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:38,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,017 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:38,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:38,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:38,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,019 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:38,019 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:38,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:38,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:38,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-15 19:53:38,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-15 19:53:38,022 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-15 19:53:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,023 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-15 19:53:38,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-15 19:53:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:38,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,226 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-10-15 19:53:38,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119791605] [2020-10-15 19:53:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119791605] [2020-10-15 19:53:38,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448466716] [2020-10-15 19:53:38,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:38,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:38,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:38,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:38,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:38,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:38,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947163421] [2020-10-15 19:53:38,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:38,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:38,459 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-15 19:53:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:38,646 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-15 19:53:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:38,646 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:38,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:38,648 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:38,648 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:38,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:38,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-15 19:53:38,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-15 19:53:38,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-15 19:53:38,651 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-15 19:53:38,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:38,652 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-15 19:53:38,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:38,652 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-15 19:53:38,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:38,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:38,652 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:38,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:38,856 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:38,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:38,856 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-10-15 19:53:38,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:38,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713397123] [2020-10-15 19:53:38,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713397123] [2020-10-15 19:53:38,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109115877] [2020-10-15 19:53:38,972 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 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 [2020-10-15 19:53:39,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304971684] [2020-10-15 19:53:39,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,130 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-15 19:53:39,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:39,201 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-15 19:53:39,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:53:39,202 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:39,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:39,203 INFO L225 Difference]: With dead ends: 182 [2020-10-15 19:53:39,203 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:53:39,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:53:39,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:53:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-15 19:53:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:53:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-15 19:53:39,209 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-15 19:53:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:39,209 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-15 19:53:39,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-15 19:53:39,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:39,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:39,211 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:39,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-15 19:53:39,420 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-10-15 19:53:39,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:39,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477402463] [2020-10-15 19:53:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477402463] [2020-10-15 19:53:39,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030386636] [2020-10-15 19:53:39,552 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 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 [2020-10-15 19:53:39,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:39,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:39,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:39,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:39,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768836323] [2020-10-15 19:53:39,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:39,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:39,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:39,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:39,720 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-15 19:53:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:39,900 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-15 19:53:39,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:39,901 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:39,903 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:53:39,903 INFO L226 Difference]: Without dead ends: 183 [2020-10-15 19:53:39,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:53:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-15 19:53:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-15 19:53:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:39,909 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:39,910 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:39,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:39,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:39,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,124 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-10-15 19:53:40,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871166361] [2020-10-15 19:53:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871166361] [2020-10-15 19:53:40,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626348123] [2020-10-15 19:53:40,207 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 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 [2020-10-15 19:53:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:40,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:40,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:40,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334184866] [2020-10-15 19:53:40,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:40,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:40,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:40,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:40,390 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:40,616 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-15 19:53:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:40,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:40,618 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:53:40,618 INFO L226 Difference]: Without dead ends: 189 [2020-10-15 19:53:40,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-15 19:53:40,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-15 19:53:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-15 19:53:40,622 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-15 19:53:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:40,622 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-15 19:53:40,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-15 19:53:40,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:40,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:40,624 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:40,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:40,824 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:40,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-10-15 19:53:40,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:40,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430882565] [2020-10-15 19:53:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:40,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:40,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430882565] [2020-10-15 19:53:40,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581979970] [2020-10-15 19:53:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:40,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:40,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437209772] [2020-10-15 19:53:41,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,087 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:41,338 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-15 19:53:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:41,339 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:41,341 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:41,341 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:41,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:41,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:41,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-15 19:53:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-15 19:53:41,345 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-15 19:53:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:41,345 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-15 19:53:41,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-15 19:53:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:41,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:41,346 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:41,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-15 19:53:41,548 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:41,548 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-10-15 19:53:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082123879] [2020-10-15 19:53:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082123879] [2020-10-15 19:53:41,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729068026] [2020-10-15 19:53:41,628 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 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 [2020-10-15 19:53:41,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:41,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:41,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:41,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:41,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382684821] [2020-10-15 19:53:41,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:41,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:41,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:41,766 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,004 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-15 19:53:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:42,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,006 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:42,006 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:42,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:42,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-15 19:53:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-15 19:53:42,010 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-15 19:53:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,010 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-15 19:53:42,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-15 19:53:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,010 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:42,211 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-10-15 19:53:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914880426] [2020-10-15 19:53:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914880426] [2020-10-15 19:53:42,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134279440] [2020-10-15 19:53:42,292 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 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 [2020-10-15 19:53:42,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:42,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:42,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:42,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:42,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:42,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348820567] [2020-10-15 19:53:42,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:42,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:42,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:42,447 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-15 19:53:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:42,710 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-15 19:53:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:42,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:42,712 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:42,712 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:42,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-15 19:53:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:53:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-15 19:53:42,716 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-15 19:53:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:42,716 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-15 19:53:42,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-15 19:53:42,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:42,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:42,717 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:42,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-15 19:53:42,918 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:42,918 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-10-15 19:53:42,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:42,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15508994] [2020-10-15 19:53:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15508994] [2020-10-15 19:53:43,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364813056] [2020-10-15 19:53:43,025 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 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 [2020-10-15 19:53:43,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631422488] [2020-10-15 19:53:43,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,180 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-15 19:53:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,253 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-15 19:53:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:53:43,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,255 INFO L225 Difference]: With dead ends: 178 [2020-10-15 19:53:43,255 INFO L226 Difference]: Without dead ends: 176 [2020-10-15 19:53:43,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:53:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-15 19:53:43,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-15 19:53:43,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-15 19:53:43,258 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-15 19:53:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,259 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-15 19:53:43,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-15 19:53:43,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:43,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:43,469 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:43,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-10-15 19:53:43,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:43,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47146941] [2020-10-15 19:53:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47146941] [2020-10-15 19:53:43,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639155532] [2020-10-15 19:53:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:43,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:43,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:43,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:43,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471091657] [2020-10-15 19:53:43,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:43,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:43,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:43,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:43,716 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-15 19:53:43,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:43,904 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-15 19:53:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:43,904 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:43,906 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:53:43,906 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:53:43,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:53:43,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:53:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-15 19:53:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-15 19:53:43,910 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-15 19:53:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:43,910 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-15 19:53:43,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-15 19:53:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:43,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:43,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-15 19:53:44,112 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,113 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-10-15 19:53:44,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924647400] [2020-10-15 19:53:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924647400] [2020-10-15 19:53:44,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974163789] [2020-10-15 19:53:44,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:44,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707284770] [2020-10-15 19:53:44,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:44,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:44,371 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-15 19:53:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:44,609 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:53:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:44,609 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:44,611 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:44,611 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:53:44,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:53:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-15 19:53:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:53:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-15 19:53:44,614 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-15 19:53:44,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:44,614 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-15 19:53:44,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-15 19:53:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:44,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:44,615 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:44,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:44,816 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:44,816 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-10-15 19:53:44,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:44,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174505335] [2020-10-15 19:53:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174505335] [2020-10-15 19:53:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650038611] [2020-10-15 19:53:44,912 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 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 [2020-10-15 19:53:44,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:44,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5254958] [2020-10-15 19:53:45,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,061 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-15 19:53:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,168 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-15 19:53:45,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:53:45,169 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,170 INFO L225 Difference]: With dead ends: 174 [2020-10-15 19:53:45,171 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 19:53:45,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:53:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 19:53:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-15 19:53:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:53:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-15 19:53:45,174 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-15 19:53:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,174 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-15 19:53:45,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-15 19:53:45,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,175 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:45,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-15 19:53:45,376 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:45,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:45,376 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-10-15 19:53:45,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:45,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554067124] [2020-10-15 19:53:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554067124] [2020-10-15 19:53:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814573150] [2020-10-15 19:53:45,457 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 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 [2020-10-15 19:53:45,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:45,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:45,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:45,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:45,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961882959] [2020-10-15 19:53:45,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:45,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:45,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:45,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:45,623 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-15 19:53:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:45,846 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-15 19:53:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:53:45,846 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:45,848 INFO L225 Difference]: With dead ends: 189 [2020-10-15 19:53:45,848 INFO L226 Difference]: Without dead ends: 187 [2020-10-15 19:53:45,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:53:45,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-15 19:53:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-15 19:53:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-15 19:53:45,851 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-15 19:53:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:45,852 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-15 19:53:45,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:45,852 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-15 19:53:45,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:45,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:45,852 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,056 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,056 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-10-15 19:53:46,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590135630] [2020-10-15 19:53:46,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590135630] [2020-10-15 19:53:46,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285146836] [2020-10-15 19:53:46,138 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 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 [2020-10-15 19:53:46,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360625058] [2020-10-15 19:53:46,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,288 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-15 19:53:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:46,417 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-15 19:53:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:53:46,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:46,419 INFO L225 Difference]: With dead ends: 175 [2020-10-15 19:53:46,419 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 19:53:46,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:53:46,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 19:53:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-15 19:53:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:46,424 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:46,425 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:46,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:46,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:46,425 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:46,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:46,626 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-10-15 19:53:46,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:46,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960828727] [2020-10-15 19:53:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960828727] [2020-10-15 19:53:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560003923] [2020-10-15 19:53:46,698 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 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 [2020-10-15 19:53:46,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:46,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:46,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:46,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:46,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:46,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:46,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202298684] [2020-10-15 19:53:46,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:46,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:46,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:46,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:46,874 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:47,202 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-15 19:53:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:47,203 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:47,204 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:53:47,204 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:53:47,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:53:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-15 19:53:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:47,208 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:47,208 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:47,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:47,208 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:47,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:47,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:47,209 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:47,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:47,410 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:47,410 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-10-15 19:53:47,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:47,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880152894] [2020-10-15 19:53:47,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880152894] [2020-10-15 19:53:47,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639021612] [2020-10-15 19:53:47,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:47,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:47,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:47,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:47,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:47,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054943995] [2020-10-15 19:53:47,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:47,651 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:47,896 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-15 19:53:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:53:47,896 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:47,898 INFO L225 Difference]: With dead ends: 187 [2020-10-15 19:53:47,898 INFO L226 Difference]: Without dead ends: 185 [2020-10-15 19:53:47,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-15 19:53:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-15 19:53:47,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:47,902 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:47,903 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:47,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:47,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:47,903 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:48,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:48,108 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:48,108 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-10-15 19:53:48,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:48,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029839375] [2020-10-15 19:53:48,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029839375] [2020-10-15 19:53:48,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016072468] [2020-10-15 19:53:48,181 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 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 [2020-10-15 19:53:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:48,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:48,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:48,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:48,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:48,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014236951] [2020-10-15 19:53:48,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:48,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:48,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:48,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:48,356 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:48,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:48,785 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-15 19:53:48,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:53:48,785 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:48,786 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:53:48,786 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:48,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:53:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:48,791 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:48,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:48,791 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:48,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:48,791 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:48,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:48,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:48,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-15 19:53:48,992 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-10-15 19:53:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:48,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361306684] [2020-10-15 19:53:48,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361306684] [2020-10-15 19:53:49,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848297520] [2020-10-15 19:53:49,064 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 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 [2020-10-15 19:53:49,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:53:49,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:49,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:49,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:49,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:53:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:49,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:49,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849472942] [2020-10-15 19:53:49,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:49,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:49,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:49,226 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:49,554 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:53:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:49,554 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:49,556 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:53:49,556 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:53:49,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:53:49,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:53:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-15 19:53:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:53:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-15 19:53:49,559 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-15 19:53:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:49,559 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-15 19:53:49,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-15 19:53:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:49,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:49,560 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:49,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:53:49,761 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-10-15 19:53:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:49,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691307237] [2020-10-15 19:53:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:49,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691307237] [2020-10-15 19:53:49,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650175525] [2020-10-15 19:53:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:53:49,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:53:49,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631161543] [2020-10-15 19:53:50,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,028 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-15 19:53:50,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:50,311 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-15 19:53:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:53:50,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:50,313 INFO L225 Difference]: With dead ends: 198 [2020-10-15 19:53:50,314 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:53:50,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:53:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:53:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-15 19:53:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:53:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-15 19:53:50,321 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-15 19:53:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:50,321 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-15 19:53:50,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-15 19:53:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:50,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:50,322 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:50,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-15 19:53:50,533 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:50,534 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-10-15 19:53:50,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:50,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359170178] [2020-10-15 19:53:50,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:50,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359170178] [2020-10-15 19:53:50,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135589753] [2020-10-15 19:53:50,601 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 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 [2020-10-15 19:53:50,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:53:50,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:50,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:50,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:50,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:50,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:50,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149296558] [2020-10-15 19:53:50,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:50,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:50,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:50,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:50,814 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-15 19:53:51,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:51,199 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-15 19:53:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:53:51,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:51,201 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:53:51,201 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:53:51,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:53:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:53:51,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-15 19:53:51,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:53:51,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-15 19:53:51,205 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-15 19:53:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:51,205 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-15 19:53:51,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-15 19:53:51,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:51,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:51,206 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:51,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-15 19:53:51,406 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:51,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-10-15 19:53:51,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:51,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850939357] [2020-10-15 19:53:51,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850939357] [2020-10-15 19:53:51,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337244052] [2020-10-15 19:53:51,480 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 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 [2020-10-15 19:53:51,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:53:51,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:51,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:51,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:51,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:51,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:51,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96615297] [2020-10-15 19:53:51,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:53:51,668 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-15 19:53:52,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:53:52,185 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-15 19:53:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:53:52,186 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:53:52,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:53:52,188 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:53:52,188 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:53:52,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:53:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:53:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-15 19:53:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:53:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-15 19:53:52,192 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-15 19:53:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:53:52,193 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-15 19:53:52,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:53:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-15 19:53:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:53:52,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:53:52,194 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:53:52,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-15 19:53:52,402 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:53:52,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:53:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-10-15 19:53:52,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:53:52,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880325553] [2020-10-15 19:53:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:53:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:53:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880325553] [2020-10-15 19:53:52,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811679111] [2020-10-15 19:53:52,470 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 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 [2020-10-15 19:53:52,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:53:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:53:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:53:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:53:54,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:53:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:53:54,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:53:54,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:53:54,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389408870] [2020-10-15 19:53:54,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:53:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:53:54,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:53:54,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-15 19:53:54,690 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-15 19:53:58,969 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:54:03,191 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:54:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:03,630 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-15 19:54:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:03,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:03,632 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:54:03,632 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:54:03,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-15 19:54:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:54:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-15 19:54:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:54:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-15 19:54:03,636 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-15 19:54:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:03,637 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-15 19:54:03,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:03,637 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-15 19:54:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:03,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:03,637 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:03,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-15 19:54:03,838 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:03,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:03,838 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-10-15 19:54:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:03,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079196613] [2020-10-15 19:54:03,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:03,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079196613] [2020-10-15 19:54:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147375488] [2020-10-15 19:54:03,916 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 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 [2020-10-15 19:54:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:04,107 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:04,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:04,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:04,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:04,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000649344] [2020-10-15 19:54:04,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:04,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:04,140 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-10-15 19:54:04,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:04,705 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-10-15 19:54:04,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:04,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:04,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:04,706 INFO L225 Difference]: With dead ends: 219 [2020-10-15 19:54:04,706 INFO L226 Difference]: Without dead ends: 214 [2020-10-15 19:54:04,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:54:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-15 19:54:04,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-10-15 19:54:04,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:54:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-15 19:54:04,710 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-15 19:54:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:04,710 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-15 19:54:04,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-15 19:54:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:04,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:04,711 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:04,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:04,921 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:04,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:04,921 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-10-15 19:54:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:04,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138814507] [2020-10-15 19:54:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138814507] [2020-10-15 19:54:05,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095862445] [2020-10-15 19:54:05,005 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 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 [2020-10-15 19:54:05,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:05,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:05,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:05,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:05,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762230080] [2020-10-15 19:54:05,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:05,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:05,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:05,183 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-15 19:54:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:05,445 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-15 19:54:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:05,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:05,446 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:54:05,446 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:54:05,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:54:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-15 19:54:05,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-15 19:54:05,450 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-15 19:54:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:05,450 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-15 19:54:05,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-15 19:54:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:05,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:05,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:05,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:05,655 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-10-15 19:54:05,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:05,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823826493] [2020-10-15 19:54:05,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823826493] [2020-10-15 19:54:05,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92383923] [2020-10-15 19:54:05,725 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 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 [2020-10-15 19:54:05,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:54:05,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:05,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:05,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:05,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:05,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026208076] [2020-10-15 19:54:05,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:05,882 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-15 19:54:06,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:06,162 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-15 19:54:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:06,163 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:06,164 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:54:06,164 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:54:06,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:06,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:54:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-15 19:54:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-15 19:54:06,167 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-15 19:54:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:06,168 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-15 19:54:06,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-15 19:54:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:06,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:06,168 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:06,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-15 19:54:06,369 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-10-15 19:54:06,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:06,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433653947] [2020-10-15 19:54:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433653947] [2020-10-15 19:54:06,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808934653] [2020-10-15 19:54:06,447 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 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 [2020-10-15 19:54:06,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:54:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:06,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:06,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:06,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:06,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:06,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571575501] [2020-10-15 19:54:06,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:06,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:06,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:06,631 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-15 19:54:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:06,916 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-15 19:54:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:54:06,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:06,917 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:54:06,917 INFO L226 Difference]: Without dead ends: 195 [2020-10-15 19:54:06,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-15 19:54:06,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-15 19:54:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-15 19:54:06,921 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-15 19:54:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:06,921 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-15 19:54:06,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-15 19:54:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:06,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:06,922 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:07,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-15 19:54:07,123 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:07,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:07,123 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-10-15 19:54:07,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:07,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508810524] [2020-10-15 19:54:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:07,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508810524] [2020-10-15 19:54:07,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999504322] [2020-10-15 19:54:07,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:54:07,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:07,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:07,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:07,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:07,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:07,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773446581] [2020-10-15 19:54:07,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:07,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:07,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:07,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:07,416 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-15 19:54:08,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:08,007 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-15 19:54:08,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:54:08,008 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:08,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:08,010 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:54:08,010 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:54:08,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:54:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-15 19:54:08,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:54:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-15 19:54:08,016 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-15 19:54:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:08,016 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-15 19:54:08,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:08,017 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-15 19:54:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:08,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:08,018 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:08,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-15 19:54:08,230 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-10-15 19:54:08,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:08,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777947291] [2020-10-15 19:54:08,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:08,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777947291] [2020-10-15 19:54:08,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514597472] [2020-10-15 19:54:08,343 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 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 [2020-10-15 19:54:08,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:08,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:08,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:08,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:08,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415962783] [2020-10-15 19:54:08,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:08,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:08,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:08,602 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-15 19:54:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:09,109 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-15 19:54:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:09,110 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:09,111 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:54:09,111 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:54:09,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:54:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:54:09,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-15 19:54:09,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:54:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:54:09,114 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:54:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:09,115 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:54:09,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:09,115 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:54:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:09,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:09,115 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:09,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:09,324 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-10-15 19:54:09,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:09,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177753251] [2020-10-15 19:54:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:09,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177753251] [2020-10-15 19:54:09,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559096321] [2020-10-15 19:54:09,400 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 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 [2020-10-15 19:54:09,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:09,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:09,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:09,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:09,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:09,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969042874] [2020-10-15 19:54:09,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:09,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:09,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:09,571 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:54:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:10,057 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-15 19:54:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:54:10,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:10,058 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:54:10,059 INFO L226 Difference]: Without dead ends: 209 [2020-10-15 19:54:10,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-15 19:54:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-15 19:54:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:10,065 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:10,065 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:10,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:10,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:10,066 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:10,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:10,275 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:10,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:10,276 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-10-15 19:54:10,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:10,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735789405] [2020-10-15 19:54:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735789405] [2020-10-15 19:54:10,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233917168] [2020-10-15 19:54:10,353 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 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 [2020-10-15 19:54:10,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:10,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:10,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:10,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:10,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:10,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:10,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961768983] [2020-10-15 19:54:10,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:10,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:10,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:10,510 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:11,000 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-15 19:54:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:54:11,000 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:11,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:11,001 INFO L225 Difference]: With dead ends: 211 [2020-10-15 19:54:11,001 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:54:11,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:54:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:54:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-15 19:54:11,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:11,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:11,004 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:11,004 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:11,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:11,005 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:11,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:11,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:11,005 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:11,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-15 19:54:11,206 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:11,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:11,206 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-10-15 19:54:11,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:11,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310326694] [2020-10-15 19:54:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310326694] [2020-10-15 19:54:11,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574509478] [2020-10-15 19:54:11,287 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 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 [2020-10-15 19:54:11,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:54:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:11,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:11,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:11,429 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:11,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:11,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:11,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827767875] [2020-10-15 19:54:11,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:11,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:11,465 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:12,070 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-15 19:54:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:54:12,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:12,072 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:54:12,072 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:54:12,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:54:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:54:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-15 19:54:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-15 19:54:12,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-15 19:54:12,076 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-15 19:54:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:12,076 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-15 19:54:12,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:12,077 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-15 19:54:12,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:12,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:12,077 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:12,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-15 19:54:12,278 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-10-15 19:54:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:12,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234528157] [2020-10-15 19:54:12,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234528157] [2020-10-15 19:54:12,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491448446] [2020-10-15 19:54:12,355 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 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 [2020-10-15 19:54:12,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:54:12,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:12,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:12,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:12,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:12,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038343203] [2020-10-15 19:54:12,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:12,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:12,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:12,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:12,522 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-15 19:54:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:13,002 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-15 19:54:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:54:13,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:13,003 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:54:13,003 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:54:13,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:54:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:54:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-15 19:54:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-15 19:54:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-15 19:54:13,006 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-15 19:54:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:13,006 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-15 19:54:13,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-15 19:54:13,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:13,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:13,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:13,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:13,207 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:13,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:13,208 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-10-15 19:54:13,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:13,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178471714] [2020-10-15 19:54:13,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178471714] [2020-10-15 19:54:13,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180876108] [2020-10-15 19:54:13,283 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 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 [2020-10-15 19:54:13,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:54:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:13,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:13,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:13,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:54:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:13,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:13,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718815069] [2020-10-15 19:54:13,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:13,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:13,429 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-15 19:54:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:14,025 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-15 19:54:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:54:14,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:14,026 INFO L225 Difference]: With dead ends: 240 [2020-10-15 19:54:14,026 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:54:14,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:54:14,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:54:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-15 19:54:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:54:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-15 19:54:14,031 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-15 19:54:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:14,031 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-15 19:54:14,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-15 19:54:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:14,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:14,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:14,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-15 19:54:14,242 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:14,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:14,242 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-10-15 19:54:14,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:14,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877465879] [2020-10-15 19:54:14,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:14,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877465879] [2020-10-15 19:54:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964825223] [2020-10-15 19:54:14,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:54:14,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:54:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:14,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:14,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:14,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:14,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479266929] [2020-10-15 19:54:14,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:14,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:14,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:14,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:14,508 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-15 19:54:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:15,165 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-15 19:54:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:54:15,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:15,169 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:54:15,169 INFO L226 Difference]: Without dead ends: 230 [2020-10-15 19:54:15,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:54:15,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-15 19:54:15,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-15 19:54:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:15,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:54:15,173 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:54:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:15,173 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:54:15,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:15,173 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:54:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:15,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:15,174 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:15,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:15,383 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-10-15 19:54:15,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:15,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510467127] [2020-10-15 19:54:15,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:15,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510467127] [2020-10-15 19:54:15,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441558311] [2020-10-15 19:54:15,459 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 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 [2020-10-15 19:54:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:15,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:15,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:15,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882007932] [2020-10-15 19:54:15,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:15,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:15,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:15,635 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:54:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:15,906 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-15 19:54:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:54:15,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:15,907 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:54:15,907 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:54:15,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:54:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:54:15,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-15 19:54:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:54:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-15 19:54:15,910 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-15 19:54:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:15,910 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-15 19:54:15,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-15 19:54:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:15,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:15,911 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:16,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-15 19:54:16,117 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:16,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:16,117 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-10-15 19:54:16,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:16,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208592016] [2020-10-15 19:54:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:16,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:16,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208592016] [2020-10-15 19:54:16,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947107393] [2020-10-15 19:54:16,200 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 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 [2020-10-15 19:54:16,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:54:16,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:16,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:54:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171050854] [2020-10-15 19:54:16,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:54:16,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:16,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:54:16,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:54:16,375 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-15 19:54:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:54:16,865 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-15 19:54:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:54:16,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:54:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:54:16,867 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:54:16,867 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:54:16,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:54:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:54:16,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-15 19:54:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-15 19:54:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-15 19:54:16,870 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-15 19:54:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:54:16,870 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-15 19:54:16,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:54:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-15 19:54:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:54:16,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:54:16,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:54:17,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:54:17,072 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:54:17,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:54:17,072 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-10-15 19:54:17,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:54:17,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660853171] [2020-10-15 19:54:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:54:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:54:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:17,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660853171] [2020-10-15 19:54:17,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278402806] [2020-10-15 19:54:17,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:54:17,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:54:17,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:54:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:54:17,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:54:17,308 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:54:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:54:18,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:54:18,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-15 19:54:18,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415105101] [2020-10-15 19:54:18,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:54:18,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:54:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:54:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-15 19:54:18,461 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-15 19:54:20,886 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:54:41,144 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-15 19:55:02,143 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-15 19:55:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:20,428 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-10-15 19:55:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:55:20,432 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-15 19:55:20,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:20,432 INFO L225 Difference]: With dead ends: 242 [2020-10-15 19:55:20,433 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:55:20,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-15 19:55:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:55:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-10-15 19:55:20,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-15 19:55:20,437 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-15 19:55:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:20,437 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-15 19:55:20,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:55:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-15 19:55:20,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:20,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:20,438 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:20,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-15 19:55:20,649 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-10-15 19:55:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:20,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938595911] [2020-10-15 19:55:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:20,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:20,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938595911] [2020-10-15 19:55:20,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89896239] [2020-10-15 19:55:20,734 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 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 [2020-10-15 19:55:20,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:20,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:20,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:20,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:20,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:20,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:20,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342682508] [2020-10-15 19:55:20,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:20,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:20,911 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-15 19:55:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:21,130 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:55:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:21,131 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:21,132 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:21,132 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:21,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:55:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-15 19:55:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:55:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-15 19:55:21,136 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-15 19:55:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:21,136 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-15 19:55:21,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-15 19:55:21,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:21,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:21,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:21,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:21,337 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:21,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:21,338 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-10-15 19:55:21,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:21,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769213473] [2020-10-15 19:55:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:21,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769213473] [2020-10-15 19:55:21,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100239561] [2020-10-15 19:55:21,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:55:21,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:21,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:21,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:21,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:21,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:21,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:21,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474756253] [2020-10-15 19:55:21,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:21,607 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-15 19:55:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:21,936 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-15 19:55:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:21,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:21,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:21,938 INFO L225 Difference]: With dead ends: 205 [2020-10-15 19:55:21,938 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 19:55:21,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:21,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 19:55:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-15 19:55:21,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:21,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-15 19:55:21,942 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-15 19:55:21,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:21,943 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-15 19:55:21,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:21,943 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-15 19:55:21,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:21,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:21,943 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:22,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:22,154 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:22,154 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-10-15 19:55:22,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:22,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474617732] [2020-10-15 19:55:22,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474617732] [2020-10-15 19:55:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625749220] [2020-10-15 19:55:22,238 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 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 [2020-10-15 19:55:22,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:22,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:22,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:22,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:22,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968072960] [2020-10-15 19:55:22,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:22,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:22,425 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-15 19:55:22,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:22,717 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:55:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:55:22,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:22,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:22,718 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:55:22,718 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:55:22,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:55:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-15 19:55:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:22,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-15 19:55:22,722 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-15 19:55:22,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:22,723 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-15 19:55:22,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:22,723 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-15 19:55:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:22,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:22,723 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:22,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:22,924 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-10-15 19:55:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:22,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191549897] [2020-10-15 19:55:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:23,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191549897] [2020-10-15 19:55:23,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698242294] [2020-10-15 19:55:23,004 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 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 [2020-10-15 19:55:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:23,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:23,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:23,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:23,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054068645] [2020-10-15 19:55:23,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:23,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:23,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:23,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:23,181 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-15 19:55:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:23,425 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-15 19:55:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:23,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:23,427 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:23,427 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:23,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:55:23,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-15 19:55:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-15 19:55:23,429 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-15 19:55:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:23,430 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-15 19:55:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-15 19:55:23,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:23,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:23,430 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:23,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-15 19:55:23,631 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:23,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:23,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-10-15 19:55:23,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:23,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364178085] [2020-10-15 19:55:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:23,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364178085] [2020-10-15 19:55:23,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764163298] [2020-10-15 19:55:23,704 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 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 [2020-10-15 19:55:23,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:23,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:23,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:23,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:23,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907847426] [2020-10-15 19:55:23,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:23,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:23,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:23,893 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-15 19:55:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:24,251 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-15 19:55:24,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:24,252 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:24,253 INFO L225 Difference]: With dead ends: 209 [2020-10-15 19:55:24,253 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 19:55:24,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:24,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 19:55:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-15 19:55:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-15 19:55:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-15 19:55:24,256 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-15 19:55:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:24,256 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-15 19:55:24,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-15 19:55:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:24,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:24,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:24,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:24,458 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-10-15 19:55:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:24,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713871772] [2020-10-15 19:55:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713871772] [2020-10-15 19:55:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152403192] [2020-10-15 19:55:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:55:24,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:24,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:24,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:24,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:24,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:24,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155684501] [2020-10-15 19:55:24,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:24,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:24,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:24,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:24,720 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-15 19:55:25,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:25,052 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-15 19:55:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:55:25,052 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:25,053 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:25,053 INFO L226 Difference]: Without dead ends: 200 [2020-10-15 19:55:25,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-15 19:55:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-15 19:55:25,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:55:25,056 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:55:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:25,056 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:55:25,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:55:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:25,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:25,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:25,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-15 19:55:25,258 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-10-15 19:55:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:25,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895188005] [2020-10-15 19:55:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895188005] [2020-10-15 19:55:25,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248562976] [2020-10-15 19:55:25,331 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 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 [2020-10-15 19:55:25,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:25,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:25,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:25,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:25,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777731888] [2020-10-15 19:55:25,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:25,510 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:25,815 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-15 19:55:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:55:25,816 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:25,816 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:55:25,817 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:55:25,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:25,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:55:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-15 19:55:25,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-15 19:55:25,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-15 19:55:25,821 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-15 19:55:25,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:25,821 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-15 19:55:25,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-15 19:55:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:25,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:25,822 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:26,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-15 19:55:26,025 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:26,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-10-15 19:55:26,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:26,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991158604] [2020-10-15 19:55:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:26,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:26,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991158604] [2020-10-15 19:55:26,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105803637] [2020-10-15 19:55:26,104 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 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 [2020-10-15 19:55:26,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:26,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:26,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:26,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367615688] [2020-10-15 19:55:26,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:26,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:26,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:26,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:26,282 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-15 19:55:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:26,749 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-15 19:55:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:55:26,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:26,751 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:55:26,751 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:55:26,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:55:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:55:26,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-15 19:55:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:55:26,755 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:55:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:26,755 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:55:26,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:55:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:26,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:26,756 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:26,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:26,965 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-10-15 19:55:26,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:26,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864024884] [2020-10-15 19:55:26,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864024884] [2020-10-15 19:55:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748269676] [2020-10-15 19:55:27,048 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 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 [2020-10-15 19:55:27,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:27,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:27,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:27,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:27,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644304180] [2020-10-15 19:55:27,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:27,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:27,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:27,218 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:55:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:27,617 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-15 19:55:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:55:27,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:27,619 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:55:27,620 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:55:27,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:55:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-15 19:55:27,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:27,624 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:27,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:27,624 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:27,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:27,625 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:27,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:27,827 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:27,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:27,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-10-15 19:55:27,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:27,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221073012] [2020-10-15 19:55:27,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:27,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221073012] [2020-10-15 19:55:27,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742691733] [2020-10-15 19:55:27,908 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 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 [2020-10-15 19:55:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:27,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:28,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:28,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:28,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:28,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016886038] [2020-10-15 19:55:28,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:28,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:28,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:28,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:28,056 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:28,434 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-15 19:55:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:28,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:28,437 INFO L225 Difference]: With dead ends: 191 [2020-10-15 19:55:28,437 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:55:28,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:55:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-15 19:55:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:28,443 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:28,444 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:28,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:28,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:28,445 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:28,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-15 19:55:28,657 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-10-15 19:55:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:28,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618187824] [2020-10-15 19:55:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:28,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618187824] [2020-10-15 19:55:28,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445763310] [2020-10-15 19:55:28,775 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 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 [2020-10-15 19:55:28,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:28,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:29,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:29,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:29,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61034378] [2020-10-15 19:55:29,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:29,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:29,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:29,022 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:29,700 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-15 19:55:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:29,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:29,702 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:55:29,702 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:55:29,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:55:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-15 19:55:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-15 19:55:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-15 19:55:29,706 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-15 19:55:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:29,706 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-15 19:55:29,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-15 19:55:29,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:29,707 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:29,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:29,915 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-10-15 19:55:29,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:29,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525786922] [2020-10-15 19:55:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:30,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525786922] [2020-10-15 19:55:30,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677764090] [2020-10-15 19:55:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:55:30,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:30,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:30,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:30,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227399897] [2020-10-15 19:55:30,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:30,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:30,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:30,283 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-15 19:55:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:30,867 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-15 19:55:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:55:30,868 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:30,869 INFO L225 Difference]: With dead ends: 222 [2020-10-15 19:55:30,869 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 19:55:30,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-15 19:55:30,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 19:55:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-15 19:55:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-15 19:55:30,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-15 19:55:30,872 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-15 19:55:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:30,873 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-15 19:55:30,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-15 19:55:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:30,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:30,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:31,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:31,074 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-10-15 19:55:31,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:31,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310023444] [2020-10-15 19:55:31,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:31,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310023444] [2020-10-15 19:55:31,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898367962] [2020-10-15 19:55:31,159 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 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 [2020-10-15 19:55:31,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:31,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:31,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:31,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:31,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:31,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:31,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:31,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:31,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773511137] [2020-10-15 19:55:31,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:31,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:31,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:31,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:31,357 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-15 19:55:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:32,161 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-15 19:55:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:32,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:32,163 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:55:32,163 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 19:55:32,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 19:55:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-15 19:55:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 19:55:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-15 19:55:32,167 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-15 19:55:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:32,167 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-15 19:55:32,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-15 19:55:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:32,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:32,168 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:32,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:32,379 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:32,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:32,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-10-15 19:55:32,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:32,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732178678] [2020-10-15 19:55:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:32,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732178678] [2020-10-15 19:55:32,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325777123] [2020-10-15 19:55:32,462 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 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 [2020-10-15 19:55:32,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:32,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:32,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:32,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:32,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:32,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:32,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:32,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642545297] [2020-10-15 19:55:32,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:32,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:32,649 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-15 19:55:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:33,435 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-15 19:55:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:33,436 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:33,437 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:55:33,437 INFO L226 Difference]: Without dead ends: 238 [2020-10-15 19:55:33,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:55:33,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-15 19:55:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-15 19:55:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-15 19:55:33,441 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-15 19:55:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:33,441 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-15 19:55:33,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:33,442 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-15 19:55:33,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:33,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:33,442 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:33,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-15 19:55:33,651 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-10-15 19:55:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:33,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279297635] [2020-10-15 19:55:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:33,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279297635] [2020-10-15 19:55:33,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394904075] [2020-10-15 19:55:33,729 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 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 [2020-10-15 19:55:33,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:33,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:33,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:33,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:33,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76120881] [2020-10-15 19:55:33,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:33,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:33,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:33,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:33,910 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-15 19:55:34,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:34,326 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-15 19:55:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:55:34,326 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:34,327 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:55:34,327 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:55:34,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:55:34,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:55:34,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-15 19:55:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 19:55:34,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-15 19:55:34,331 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-15 19:55:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:34,331 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-15 19:55:34,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:34,331 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-15 19:55:34,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:34,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:34,331 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:34,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-15 19:55:34,532 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:34,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-10-15 19:55:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:34,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922026766] [2020-10-15 19:55:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:34,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922026766] [2020-10-15 19:55:34,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001937452] [2020-10-15 19:55:34,616 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 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 [2020-10-15 19:55:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:34,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:34,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:34,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911019769] [2020-10-15 19:55:34,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:34,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:34,781 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-15 19:55:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:35,334 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-15 19:55:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:55:35,335 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:35,336 INFO L225 Difference]: With dead ends: 215 [2020-10-15 19:55:35,336 INFO L226 Difference]: Without dead ends: 213 [2020-10-15 19:55:35,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:55:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-15 19:55:35,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-15 19:55:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:55:35,339 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:55:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:35,340 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:55:35,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:55:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:35,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:35,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:35,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-15 19:55:35,541 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-10-15 19:55:35,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:35,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198719430] [2020-10-15 19:55:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198719430] [2020-10-15 19:55:35,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355788564] [2020-10-15 19:55:35,626 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 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 [2020-10-15 19:55:35,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:35,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:35,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:35,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:35,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:35,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:35,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:35,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885747794] [2020-10-15 19:55:35,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:35,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:35,786 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:36,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:36,372 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-15 19:55:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:36,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:36,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:36,373 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:55:36,373 INFO L226 Difference]: Without dead ends: 228 [2020-10-15 19:55:36,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:36,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-15 19:55:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-15 19:55:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-15 19:55:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-15 19:55:36,376 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-15 19:55:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:36,376 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-15 19:55:36,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-15 19:55:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:36,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:36,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:36,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-15 19:55:36,578 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-10-15 19:55:36,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:36,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903968560] [2020-10-15 19:55:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903968560] [2020-10-15 19:55:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042220443] [2020-10-15 19:55:36,665 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 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 [2020-10-15 19:55:36,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:55:36,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:36,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:36,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:36,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:36,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:36,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:36,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368082807] [2020-10-15 19:55:36,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:36,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:36,838 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-15 19:55:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:37,490 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-15 19:55:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:55:37,491 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:37,491 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:55:37,492 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:55:37,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:55:37,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:55:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-15 19:55:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-15 19:55:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-15 19:55:37,495 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-15 19:55:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:37,495 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-15 19:55:37,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:37,496 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-15 19:55:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:37,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:37,496 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:37,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-15 19:55:37,697 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-10-15 19:55:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:37,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498915515] [2020-10-15 19:55:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498915515] [2020-10-15 19:55:37,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010300655] [2020-10-15 19:55:37,792 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 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 [2020-10-15 19:55:37,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:37,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-15 19:55:37,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:37,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:37,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:37,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-15 19:55:37,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908919883] [2020-10-15 19:55:37,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 19:55:37,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:37,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 19:55:37,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-15 19:55:37,960 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-15 19:55:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:38,573 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-15 19:55:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:55:38,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-15 19:55:38,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:38,574 INFO L225 Difference]: With dead ends: 232 [2020-10-15 19:55:38,574 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 19:55:38,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:55:38,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 19:55:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-15 19:55:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-15 19:55:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-15 19:55:38,578 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-15 19:55:38,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:38,579 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-15 19:55:38,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 19:55:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-15 19:55:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:38,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:38,579 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:38,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:38,780 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-10-15 19:55:38,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:38,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607774871] [2020-10-15 19:55:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:38,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607774871] [2020-10-15 19:55:38,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447609260] [2020-10-15 19:55:38,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:38,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:55:38,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:38,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:39,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:55:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:39,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:39,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:55:39,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515010572] [2020-10-15 19:55:39,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:55:39,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:39,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:55:39,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:55:39,169 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-15 19:55:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:39,431 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-15 19:55:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:55:39,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-15 19:55:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:39,433 INFO L225 Difference]: With dead ends: 185 [2020-10-15 19:55:39,433 INFO L226 Difference]: Without dead ends: 180 [2020-10-15 19:55:39,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:55:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-15 19:55:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-15 19:55:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-15 19:55:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-15 19:55:39,438 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-15 19:55:39,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:39,438 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-15 19:55:39,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 19:55:39,438 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-15 19:55:39,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:39,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:39,439 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:39,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-15 19:55:39,649 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-10-15 19:55:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:39,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997389564] [2020-10-15 19:55:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:39,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997389564] [2020-10-15 19:55:39,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85523574] [2020-10-15 19:55:39,813 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 [2020-10-15 19:55:39,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:55:39,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:39,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:40,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:40,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050097469] [2020-10-15 19:55:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:40,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:40,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:40,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:40,045 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-15 19:55:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:40,104 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-15 19:55:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:55:40,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:40,106 INFO L225 Difference]: With dead ends: 180 [2020-10-15 19:55:40,106 INFO L226 Difference]: Without dead ends: 177 [2020-10-15 19:55:40,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-15 19:55:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-15 19:55:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:55:40,109 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:55:40,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:40,110 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:55:40,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:55:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:40,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:40,110 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:40,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-15 19:55:40,311 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:40,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-10-15 19:55:40,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:40,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510257336] [2020-10-15 19:55:40,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510257336] [2020-10-15 19:55:40,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034321240] [2020-10-15 19:55:40,463 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 [2020-10-15 19:55:40,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:40,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:40,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:40,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:40,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601218584] [2020-10-15 19:55:40,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:40,676 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:55:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:40,752 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-15 19:55:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:55:40,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:40,753 INFO L225 Difference]: With dead ends: 197 [2020-10-15 19:55:40,753 INFO L226 Difference]: Without dead ends: 194 [2020-10-15 19:55:40,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:55:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-15 19:55:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-15 19:55:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-15 19:55:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-15 19:55:40,757 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-15 19:55:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:40,757 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-15 19:55:40,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-15 19:55:40,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:40,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:40,757 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:40,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:40,958 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:40,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:40,959 INFO L82 PathProgramCache]: Analyzing trace with hash 551260342, now seen corresponding path program 23 times [2020-10-15 19:55:40,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:40,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87442292] [2020-10-15 19:55:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:41,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87442292] [2020-10-15 19:55:41,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927561909] [2020-10-15 19:55:41,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:55:41,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 19:55:41,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:41,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:41,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:41,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293531604] [2020-10-15 19:55:41,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:41,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:41,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:41,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:41,392 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-15 19:55:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:41,499 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-15 19:55:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:55:41,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:41,501 INFO L225 Difference]: With dead ends: 196 [2020-10-15 19:55:41,501 INFO L226 Difference]: Without dead ends: 193 [2020-10-15 19:55:41,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:55:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-15 19:55:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-15 19:55:41,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-15 19:55:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-15 19:55:41,504 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-15 19:55:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:41,504 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-15 19:55:41,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-15 19:55:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:41,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:41,505 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:41,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:41,705 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:41,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1216195462, now seen corresponding path program 24 times [2020-10-15 19:55:41,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:41,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564418736] [2020-10-15 19:55:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564418736] [2020-10-15 19:55:41,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923927663] [2020-10-15 19:55:41,828 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 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 [2020-10-15 19:55:41,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 19:55:41,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:41,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:42,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:42,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:42,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301470432] [2020-10-15 19:55:42,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:42,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:42,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:42,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:42,163 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-15 19:55:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:42,335 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-15 19:55:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:55:42,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:42,336 INFO L225 Difference]: With dead ends: 195 [2020-10-15 19:55:42,336 INFO L226 Difference]: Without dead ends: 192 [2020-10-15 19:55:42,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:55:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-15 19:55:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-15 19:55:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 19:55:42,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-15 19:55:42,340 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-15 19:55:42,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:42,340 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-15 19:55:42,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:42,341 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-15 19:55:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:42,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:42,341 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:42,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:42,551 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1237644982, now seen corresponding path program 25 times [2020-10-15 19:55:42,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:42,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740631565] [2020-10-15 19:55:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:42,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740631565] [2020-10-15 19:55:42,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599463189] [2020-10-15 19:55:42,668 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 [2020-10-15 19:55:42,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:42,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:42,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:42,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346151983] [2020-10-15 19:55:42,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:42,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:42,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:42,872 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-15 19:55:43,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:43,054 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-15 19:55:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:55:43,055 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:43,056 INFO L225 Difference]: With dead ends: 194 [2020-10-15 19:55:43,056 INFO L226 Difference]: Without dead ends: 191 [2020-10-15 19:55:43,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:55:43,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-15 19:55:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-15 19:55:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 19:55:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-15 19:55:43,060 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-15 19:55:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:43,061 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-15 19:55:43,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-15 19:55:43,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:43,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:43,062 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:43,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:43,271 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1238336902, now seen corresponding path program 26 times [2020-10-15 19:55:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:43,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232491913] [2020-10-15 19:55:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232491913] [2020-10-15 19:55:43,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217606534] [2020-10-15 19:55:43,374 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 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 [2020-10-15 19:55:43,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:43,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:43,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:43,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:43,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:43,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358270734] [2020-10-15 19:55:43,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:43,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:43,595 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-15 19:55:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:43,802 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-15 19:55:43,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:55:43,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:43,804 INFO L225 Difference]: With dead ends: 193 [2020-10-15 19:55:43,804 INFO L226 Difference]: Without dead ends: 190 [2020-10-15 19:55:43,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:55:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-15 19:55:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-15 19:55:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:55:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-15 19:55:43,808 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-15 19:55:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:43,808 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-15 19:55:43,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-15 19:55:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-15 19:55:43,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:43,809 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:44,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-15 19:55:44,010 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:44,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:44,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1238359222, now seen corresponding path program 27 times [2020-10-15 19:55:44,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:44,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337344964] [2020-10-15 19:55:44,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337344964] [2020-10-15 19:55:44,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063792078] [2020-10-15 19:55:44,114 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 [2020-10-15 19:55:44,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:55:44,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:44,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:44,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:44,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:55:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:44,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:44,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:44,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310936350] [2020-10-15 19:55:44,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:44,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:44,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:44,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:44,345 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-15 19:55:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:44,596 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-15 19:55:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:55:44,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-15 19:55:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:44,598 INFO L225 Difference]: With dead ends: 202 [2020-10-15 19:55:44,599 INFO L226 Difference]: Without dead ends: 196 [2020-10-15 19:55:44,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-15 19:55:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-15 19:55:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 19:55:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-15 19:55:44,602 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-15 19:55:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:44,602 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-15 19:55:44,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-15 19:55:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:44,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:44,603 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:44,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-15 19:55:44,818 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-10-15 19:55:44,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:44,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986320301] [2020-10-15 19:55:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:44,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986320301] [2020-10-15 19:55:44,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676093953] [2020-10-15 19:55:44,942 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 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 [2020-10-15 19:55:44,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:55:44,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:44,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:45,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:45,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:45,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985494797] [2020-10-15 19:55:45,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:45,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:45,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:45,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:45,170 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-15 19:55:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:45,233 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-15 19:55:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 19:55:45,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:45,234 INFO L225 Difference]: With dead ends: 188 [2020-10-15 19:55:45,235 INFO L226 Difference]: Without dead ends: 186 [2020-10-15 19:55:45,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:45,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-15 19:55:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-15 19:55:45,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:55:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-15 19:55:45,239 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-15 19:55:45,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:45,239 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-15 19:55:45,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:45,239 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-15 19:55:45,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:45,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:45,239 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:45,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-15 19:55:45,440 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:45,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:45,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-10-15 19:55:45,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:45,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653996221] [2020-10-15 19:55:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:45,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653996221] [2020-10-15 19:55:45,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863670212] [2020-10-15 19:55:45,562 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 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 [2020-10-15 19:55:45,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:55:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:45,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:45,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:45,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961301376] [2020-10-15 19:55:45,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:45,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:45,787 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-15 19:55:46,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:46,009 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-15 19:55:46,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:55:46,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:46,010 INFO L225 Difference]: With dead ends: 199 [2020-10-15 19:55:46,011 INFO L226 Difference]: Without dead ends: 197 [2020-10-15 19:55:46,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:55:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-15 19:55:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-15 19:55:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:55:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:55:46,014 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:55:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:46,014 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:55:46,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:55:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:46,015 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:46,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-15 19:55:46,215 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-10-15 19:55:46,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:46,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653153896] [2020-10-15 19:55:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:46,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653153896] [2020-10-15 19:55:46,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102327776] [2020-10-15 19:55:46,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:55:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:46,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:46,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:46,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:46,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:46,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057684549] [2020-10-15 19:55:46,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:46,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:46,680 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:55:46,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:46,976 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:55:46,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:55:46,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:46,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:46,977 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:55:46,977 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:55:46,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:55:46,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:55:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-15 19:55:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 19:55:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-15 19:55:46,981 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-15 19:55:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:46,981 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-15 19:55:46,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:46,981 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-15 19:55:46,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:46,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:46,981 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-15 19:55:47,182 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:47,183 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-10-15 19:55:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:47,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886663685] [2020-10-15 19:55:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886663685] [2020-10-15 19:55:47,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299320882] [2020-10-15 19:55:47,304 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 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 [2020-10-15 19:55:47,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:55:47,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:47,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:49,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:49,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:49,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395598270] [2020-10-15 19:55:49,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:49,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:49,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:49,937 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-15 19:55:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:50,282 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-15 19:55:50,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:55:50,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:50,283 INFO L225 Difference]: With dead ends: 210 [2020-10-15 19:55:50,283 INFO L226 Difference]: Without dead ends: 208 [2020-10-15 19:55:50,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:50,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-15 19:55:50,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-15 19:55:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 19:55:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-15 19:55:50,287 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-15 19:55:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:50,287 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-15 19:55:50,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-15 19:55:50,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:50,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:50,288 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:50,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-15 19:55:50,488 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-10-15 19:55:50,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:50,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031608050] [2020-10-15 19:55:50,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:50,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031608050] [2020-10-15 19:55:50,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563450363] [2020-10-15 19:55:50,610 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 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 [2020-10-15 19:55:50,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-15 19:55:50,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:50,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:50,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:54,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:54,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859936948] [2020-10-15 19:55:54,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:55:54,205 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-15 19:55:58,444 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:55:58,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:58,712 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:55:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:55:58,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:58,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:58,713 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:55:58,713 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:55:58,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-15 19:55:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:55:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:55:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:55:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:55:58,717 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:55:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:58,717 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:55:58,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:55:58,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:58,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:58,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:55:58,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:55:58,918 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:55:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:55:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-10-15 19:55:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:55:58,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853955455] [2020-10-15 19:55:58,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:55:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:55:59,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:59,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853955455] [2020-10-15 19:55:59,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804629590] [2020-10-15 19:55:59,038 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 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 [2020-10-15 19:55:59,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:55:59,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:55:59,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:55:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:55:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:55:59,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:55:59,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:55:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744573974] [2020-10-15 19:55:59,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:55:59,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:55:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:55:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:55:59,484 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:55:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:55:59,962 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-15 19:55:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:55:59,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:55:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:55:59,964 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:55:59,964 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:55:59,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:55:59,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:55:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-15 19:55:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 19:55:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-15 19:55:59,967 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-15 19:55:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:55:59,968 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-15 19:55:59,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:55:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-15 19:55:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:55:59,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:55:59,969 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:00,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:00,177 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:00,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:00,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-10-15 19:56:00,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:00,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866566345] [2020-10-15 19:56:00,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:00,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866566345] [2020-10-15 19:56:00,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322749966] [2020-10-15 19:56:00,291 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 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 [2020-10-15 19:56:00,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:00,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:00,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:00,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:00,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646635357] [2020-10-15 19:56:00,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:00,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:00,509 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-15 19:56:00,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:00,864 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:56:00,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:00,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:00,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:00,865 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:56:00,865 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:56:00,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:00,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:56:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-15 19:56:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:00,868 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:00,868 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:00,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:00,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:00,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:01,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:01,069 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-10-15 19:56:01,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:01,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004709520] [2020-10-15 19:56:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:01,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004709520] [2020-10-15 19:56:01,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738004970] [2020-10-15 19:56:01,191 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 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 [2020-10-15 19:56:01,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:56:01,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:01,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:01,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:01,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:01,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:01,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:01,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130872729] [2020-10-15 19:56:01,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:01,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:01,435 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:01,807 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-15 19:56:01,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:01,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:01,808 INFO L225 Difference]: With dead ends: 224 [2020-10-15 19:56:01,809 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 19:56:01,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 19:56:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-15 19:56:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:01,812 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:01,813 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:01,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:01,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:01,813 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:02,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:02,015 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:02,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:02,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-10-15 19:56:02,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:02,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461948468] [2020-10-15 19:56:02,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:02,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461948468] [2020-10-15 19:56:02,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659220018] [2020-10-15 19:56:02,131 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 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 [2020-10-15 19:56:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:02,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:02,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:02,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:02,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:02,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:02,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918946667] [2020-10-15 19:56:02,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:02,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:02,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:02,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:02,338 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:02,669 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-15 19:56:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:02,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:02,671 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:02,671 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:02,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:02,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-15 19:56:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 19:56:02,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-15 19:56:02,676 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-15 19:56:02,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:02,676 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-15 19:56:02,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-15 19:56:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:02,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:02,677 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:02,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:02,878 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-10-15 19:56:02,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:02,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183428342] [2020-10-15 19:56:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:02,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183428342] [2020-10-15 19:56:02,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911131983] [2020-10-15 19:56:02,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:56:03,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:03,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:03,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:03,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:03,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:03,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748562094] [2020-10-15 19:56:03,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:03,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:03,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:03,219 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:03,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:03,515 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-15 19:56:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:03,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:03,517 INFO L225 Difference]: With dead ends: 206 [2020-10-15 19:56:03,517 INFO L226 Difference]: Without dead ends: 204 [2020-10-15 19:56:03,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-15 19:56:03,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-15 19:56:03,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-15 19:56:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-15 19:56:03,521 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-15 19:56:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:03,521 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-15 19:56:03,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-15 19:56:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:03,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:03,522 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:03,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-15 19:56:03,723 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:03,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:03,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-10-15 19:56:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:03,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118988035] [2020-10-15 19:56:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:03,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118988035] [2020-10-15 19:56:03,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841371344] [2020-10-15 19:56:03,849 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 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 [2020-10-15 19:56:03,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 19:56:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:03,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:04,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:04,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:04,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975993445] [2020-10-15 19:56:04,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:04,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:04,075 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-15 19:56:04,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:04,367 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-15 19:56:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:04,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:04,368 INFO L225 Difference]: With dead ends: 207 [2020-10-15 19:56:04,369 INFO L226 Difference]: Without dead ends: 205 [2020-10-15 19:56:04,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-15 19:56:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-15 19:56:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:56:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-15 19:56:04,372 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-15 19:56:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:04,372 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-15 19:56:04,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:04,372 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-15 19:56:04,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:04,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:04,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:04,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-15 19:56:04,574 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-10-15 19:56:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:04,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828955635] [2020-10-15 19:56:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:04,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828955635] [2020-10-15 19:56:04,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994830434] [2020-10-15 19:56:04,700 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 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 [2020-10-15 19:56:04,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:04,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:04,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:04,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385768799] [2020-10-15 19:56:04,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:04,922 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-15 19:56:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:05,245 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-15 19:56:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:05,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:05,247 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:56:05,247 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:56:05,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:56:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-15 19:56:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:56:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-15 19:56:05,251 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-15 19:56:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:05,251 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-15 19:56:05,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-15 19:56:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:05,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:05,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:05,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-15 19:56:05,452 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:05,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-10-15 19:56:05,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:05,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186942882] [2020-10-15 19:56:05,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:05,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186942882] [2020-10-15 19:56:05,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877725364] [2020-10-15 19:56:05,572 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 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 [2020-10-15 19:56:05,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:06,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:06,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:06,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791732847] [2020-10-15 19:56:06,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:06,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:06,475 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-15 19:56:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:06,899 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-15 19:56:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:06,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:06,901 INFO L225 Difference]: With dead ends: 223 [2020-10-15 19:56:06,901 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:56:06,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:56:06,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-15 19:56:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-15 19:56:06,904 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-15 19:56:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:06,905 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-15 19:56:06,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-15 19:56:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:06,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:06,905 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:07,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-15 19:56:07,108 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-10-15 19:56:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:07,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130678148] [2020-10-15 19:56:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130678148] [2020-10-15 19:56:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897983409] [2020-10-15 19:56:07,229 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 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 [2020-10-15 19:56:07,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:07,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:07,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:07,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:07,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:07,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:07,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:07,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780912852] [2020-10-15 19:56:07,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:07,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:07,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:07,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:07,457 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:07,774 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-15 19:56:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:07,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:07,776 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:07,776 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:07,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:07,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-15 19:56:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:07,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-15 19:56:07,780 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-15 19:56:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:07,780 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-15 19:56:07,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-15 19:56:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:07,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:07,780 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:07,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:07,981 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:07,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-10-15 19:56:07,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:07,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460130081] [2020-10-15 19:56:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:07,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:08,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460130081] [2020-10-15 19:56:08,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843600074] [2020-10-15 19:56:08,112 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 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 [2020-10-15 19:56:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:08,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:08,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:08,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:08,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:08,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133643515] [2020-10-15 19:56:08,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:08,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:08,349 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-15 19:56:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:08,682 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-15 19:56:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:08,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:08,683 INFO L225 Difference]: With dead ends: 214 [2020-10-15 19:56:08,683 INFO L226 Difference]: Without dead ends: 212 [2020-10-15 19:56:08,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-15 19:56:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-15 19:56:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-15 19:56:08,687 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-15 19:56:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:08,687 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-15 19:56:08,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-15 19:56:08,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:08,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:08,688 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:08,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:08,888 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-10-15 19:56:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:08,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919955393] [2020-10-15 19:56:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:09,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919955393] [2020-10-15 19:56:09,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549598319] [2020-10-15 19:56:09,056 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 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 [2020-10-15 19:56:09,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:09,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:09,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:09,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:09,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38629502] [2020-10-15 19:56:09,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:09,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:09,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:09,292 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-15 19:56:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:09,525 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-15 19:56:09,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:09,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:09,526 INFO L225 Difference]: With dead ends: 203 [2020-10-15 19:56:09,526 INFO L226 Difference]: Without dead ends: 201 [2020-10-15 19:56:09,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-15 19:56:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-15 19:56:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-15 19:56:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 19:56:09,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-15 19:56:09,530 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-15 19:56:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:09,530 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-15 19:56:09,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-15 19:56:09,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:09,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:09,531 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:09,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-15 19:56:09,731 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:09,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-10-15 19:56:09,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:09,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7976352] [2020-10-15 19:56:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:09,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:09,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7976352] [2020-10-15 19:56:09,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056185651] [2020-10-15 19:56:09,911 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 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 [2020-10-15 19:56:09,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:09,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:10,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:10,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685355716] [2020-10-15 19:56:10,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:10,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:10,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:10,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:10,143 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:10,232 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-15 19:56:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 19:56:10,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:10,234 INFO L225 Difference]: With dead ends: 212 [2020-10-15 19:56:10,234 INFO L226 Difference]: Without dead ends: 210 [2020-10-15 19:56:10,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-15 19:56:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-15 19:56:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-15 19:56:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-15 19:56:10,238 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-15 19:56:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:10,238 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-15 19:56:10,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-15 19:56:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:10,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:10,239 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:10,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:10,440 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-10-15 19:56:10,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381597319] [2020-10-15 19:56:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:10,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381597319] [2020-10-15 19:56:10,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052076598] [2020-10-15 19:56:10,601 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 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 [2020-10-15 19:56:10,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:10,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:10,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:10,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512923476] [2020-10-15 19:56:10,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:10,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:10,847 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-15 19:56:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:11,120 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-15 19:56:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:11,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:11,122 INFO L225 Difference]: With dead ends: 217 [2020-10-15 19:56:11,122 INFO L226 Difference]: Without dead ends: 215 [2020-10-15 19:56:11,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 19:56:11,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-15 19:56:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-15 19:56:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:56:11,125 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:56:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:11,125 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:56:11,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:56:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:11,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:11,126 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:11,327 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-10-15 19:56:11,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:11,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834983321] [2020-10-15 19:56:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:11,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834983321] [2020-10-15 19:56:11,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877562694] [2020-10-15 19:56:11,480 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 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 [2020-10-15 19:56:11,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:11,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:11,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:11,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:11,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255340601] [2020-10-15 19:56:11,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:11,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:11,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:11,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:11,746 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:56:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:12,097 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:56:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:12,098 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:12,098 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:56:12,098 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:56:12,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:56:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-15 19:56:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-15 19:56:12,102 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-15 19:56:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:12,102 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-15 19:56:12,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-15 19:56:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:12,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:12,102 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:12,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:12,303 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:12,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:12,304 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-10-15 19:56:12,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:12,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304071479] [2020-10-15 19:56:12,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:12,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:12,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304071479] [2020-10-15 19:56:12,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75858117] [2020-10-15 19:56:12,439 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 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 [2020-10-15 19:56:12,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:12,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:12,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:12,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:12,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:12,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307991545] [2020-10-15 19:56:12,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:12,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:12,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:12,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:12,703 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-15 19:56:13,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:13,146 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-15 19:56:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:13,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:13,148 INFO L225 Difference]: With dead ends: 227 [2020-10-15 19:56:13,148 INFO L226 Difference]: Without dead ends: 225 [2020-10-15 19:56:13,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-15 19:56:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-15 19:56:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-15 19:56:13,151 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-15 19:56:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:13,151 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-15 19:56:13,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-15 19:56:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:13,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:13,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:13,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-15 19:56:13,354 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:13,355 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-10-15 19:56:13,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:13,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52835706] [2020-10-15 19:56:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:13,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52835706] [2020-10-15 19:56:13,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127474616] [2020-10-15 19:56:13,483 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 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 [2020-10-15 19:56:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:13,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:17,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:17,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:17,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089791639] [2020-10-15 19:56:17,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:17,708 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-15 19:56:21,942 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:56:22,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:22,277 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-15 19:56:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:22,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:22,281 INFO L225 Difference]: With dead ends: 237 [2020-10-15 19:56:22,281 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 19:56:22,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-15 19:56:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 19:56:22,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-15 19:56:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:22,284 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:22,284 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:22,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:22,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:22,285 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:22,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-15 19:56:22,486 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-10-15 19:56:22,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:22,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652572913] [2020-10-15 19:56:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:22,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652572913] [2020-10-15 19:56:22,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992351512] [2020-10-15 19:56:22,626 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 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 [2020-10-15 19:56:22,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:22,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:22,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:22,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281634144] [2020-10-15 19:56:22,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:22,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:22,932 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:23,408 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-15 19:56:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:23,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:23,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:23,409 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:56:23,409 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:23,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 19:56:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-15 19:56:23,413 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-15 19:56:23,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:23,414 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-15 19:56:23,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:23,414 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-15 19:56:23,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:23,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:23,414 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:23,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-15 19:56:23,615 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:23,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-10-15 19:56:23,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:23,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199853312] [2020-10-15 19:56:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:23,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199853312] [2020-10-15 19:56:23,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723262920] [2020-10-15 19:56:23,732 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 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 [2020-10-15 19:56:23,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:23,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:23,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:23,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:23,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237177250] [2020-10-15 19:56:23,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:23,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:23,965 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-15 19:56:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:24,414 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-15 19:56:24,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:24,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:24,415 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:24,415 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:24,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-15 19:56:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:24,418 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:24,418 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:24,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:24,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:24,419 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:24,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-15 19:56:24,619 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-10-15 19:56:24,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:24,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592278761] [2020-10-15 19:56:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:24,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592278761] [2020-10-15 19:56:24,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275563280] [2020-10-15 19:56:24,733 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 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 [2020-10-15 19:56:24,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:24,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:25,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:25,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:25,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550712731] [2020-10-15 19:56:25,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:25,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:25,027 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:25,777 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-15 19:56:25,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:25,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:25,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:25,780 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:56:25,780 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:56:25,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:56:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:56:25,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:25,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:25,786 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:25,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:25,787 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:25,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:25,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:25,788 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-15 19:56:26,001 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-10-15 19:56:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219816076] [2020-10-15 19:56:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:26,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:26,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219816076] [2020-10-15 19:56:26,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584871941] [2020-10-15 19:56:26,121 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 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 [2020-10-15 19:56:26,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:26,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:26,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:26,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301667576] [2020-10-15 19:56:26,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:26,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:26,342 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:26,743 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-15 19:56:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:26,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:26,744 INFO L225 Difference]: With dead ends: 234 [2020-10-15 19:56:26,745 INFO L226 Difference]: Without dead ends: 232 [2020-10-15 19:56:26,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:26,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-15 19:56:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-15 19:56:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-15 19:56:26,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-15 19:56:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:26,748 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-15 19:56:26,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:26,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-15 19:56:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:26,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:26,749 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:26,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-15 19:56:26,956 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-10-15 19:56:26,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:26,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196962857] [2020-10-15 19:56:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196962857] [2020-10-15 19:56:27,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309526049] [2020-10-15 19:56:27,072 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 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 [2020-10-15 19:56:27,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:27,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:27,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:27,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287224629] [2020-10-15 19:56:27,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:27,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:27,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:27,289 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-15 19:56:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:27,642 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-15 19:56:27,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:27,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:27,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:27,644 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:27,644 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:27,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-15 19:56:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:56:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-15 19:56:27,648 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-15 19:56:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:27,648 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-15 19:56:27,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-15 19:56:27,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:27,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:27,649 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:27,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:27,856 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-10-15 19:56:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:27,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775870266] [2020-10-15 19:56:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:28,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775870266] [2020-10-15 19:56:28,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659753149] [2020-10-15 19:56:28,021 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 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 [2020-10-15 19:56:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:28,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:28,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:28,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695226715] [2020-10-15 19:56:28,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:28,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:28,277 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-15 19:56:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:28,439 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-15 19:56:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 19:56:28,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:28,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:28,441 INFO L225 Difference]: With dead ends: 208 [2020-10-15 19:56:28,441 INFO L226 Difference]: Without dead ends: 206 [2020-10-15 19:56:28,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 19:56:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-15 19:56:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-15 19:56:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:56:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-15 19:56:28,447 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-15 19:56:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:28,448 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-15 19:56:28,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:28,448 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-15 19:56:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:28,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:28,449 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:28,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:28,661 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-10-15 19:56:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766288739] [2020-10-15 19:56:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:28,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766288739] [2020-10-15 19:56:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672063673] [2020-10-15 19:56:28,888 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 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 [2020-10-15 19:56:28,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:28,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:28,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:29,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:29,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:29,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113128800] [2020-10-15 19:56:29,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:29,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:29,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:29,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:29,182 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-15 19:56:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:29,508 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-15 19:56:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:29,509 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:29,510 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:56:29,510 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:56:29,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-15 19:56:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:56:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-15 19:56:29,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:56:29,513 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:56:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:29,513 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:56:29,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:29,514 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:56:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:29,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:29,514 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:29,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:29,715 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-10-15 19:56:29,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:29,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050622894] [2020-10-15 19:56:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:29,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050622894] [2020-10-15 19:56:29,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354595769] [2020-10-15 19:56:29,857 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 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 [2020-10-15 19:56:29,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:30,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:30,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:30,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183086937] [2020-10-15 19:56:30,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:30,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:30,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:30,119 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:30,533 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-15 19:56:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:30,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:30,535 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:56:30,535 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:30,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-15 19:56:30,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-15 19:56:30,539 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-15 19:56:30,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:30,539 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-15 19:56:30,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:30,539 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-15 19:56:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:30,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:30,539 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:30,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:30,740 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-10-15 19:56:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:30,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162846499] [2020-10-15 19:56:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:30,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162846499] [2020-10-15 19:56:30,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493113890] [2020-10-15 19:56:30,862 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 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 [2020-10-15 19:56:30,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:30,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:31,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:31,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:31,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467263919] [2020-10-15 19:56:31,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:31,147 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-15 19:56:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:31,635 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-15 19:56:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:31,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:31,636 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:56:31,637 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:56:31,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:56:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-15 19:56:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:31,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-15 19:56:31,640 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-15 19:56:31,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:31,640 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-15 19:56:31,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-15 19:56:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:31,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:31,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:31,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:31,849 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-10-15 19:56:31,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:31,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625756586] [2020-10-15 19:56:31,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:31,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625756586] [2020-10-15 19:56:31,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819483106] [2020-10-15 19:56:31,966 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 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 [2020-10-15 19:56:32,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:32,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:32,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:34,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:34,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:34,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850316570] [2020-10-15 19:56:34,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:34,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:34,998 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:39,281 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:56:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:39,648 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-15 19:56:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:39,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:39,650 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:56:39,650 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:56:39,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:56:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:56:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:56:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-15 19:56:39,653 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-15 19:56:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:39,653 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-15 19:56:39,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-15 19:56:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:39,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:39,653 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:39,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:39,854 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:39,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-10-15 19:56:39,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:39,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63894573] [2020-10-15 19:56:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63894573] [2020-10-15 19:56:39,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846911698] [2020-10-15 19:56:39,965 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 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 [2020-10-15 19:56:40,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:40,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:40,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:40,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386514836] [2020-10-15 19:56:40,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:40,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:40,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:40,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:40,274 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-15 19:56:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:40,758 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-15 19:56:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:40,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:40,759 INFO L225 Difference]: With dead ends: 233 [2020-10-15 19:56:40,759 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 19:56:40,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:40,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 19:56:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-15 19:56:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:56:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-15 19:56:40,763 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-15 19:56:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:40,763 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-15 19:56:40,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-15 19:56:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:40,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:40,763 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:40,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-15 19:56:40,964 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-10-15 19:56:40,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:40,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647871114] [2020-10-15 19:56:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647871114] [2020-10-15 19:56:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571105712] [2020-10-15 19:56:41,109 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 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 [2020-10-15 19:56:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:41,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:41,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988825071] [2020-10-15 19:56:41,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:41,365 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-15 19:56:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:41,511 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-15 19:56:41,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 19:56:41,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:41,513 INFO L225 Difference]: With dead ends: 204 [2020-10-15 19:56:41,513 INFO L226 Difference]: Without dead ends: 202 [2020-10-15 19:56:41,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-15 19:56:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-15 19:56:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-15 19:56:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-15 19:56:41,517 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-15 19:56:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:41,517 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-15 19:56:41,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-15 19:56:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:41,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:41,517 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:41,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:41,718 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-10-15 19:56:41,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:41,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109055620] [2020-10-15 19:56:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109055620] [2020-10-15 19:56:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087613560] [2020-10-15 19:56:41,852 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 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 [2020-10-15 19:56:41,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:41,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:42,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:42,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913691894] [2020-10-15 19:56:42,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:42,070 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-15 19:56:42,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:42,402 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-15 19:56:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:42,403 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:42,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:42,403 INFO L225 Difference]: With dead ends: 225 [2020-10-15 19:56:42,404 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 19:56:42,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 19:56:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 19:56:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-15 19:56:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-15 19:56:42,407 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-15 19:56:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:42,407 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-15 19:56:42,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-15 19:56:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:42,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:42,407 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:42,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-15 19:56:42,608 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-10-15 19:56:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:42,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582445933] [2020-10-15 19:56:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582445933] [2020-10-15 19:56:42,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704162165] [2020-10-15 19:56:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:56:42,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:42,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:42,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:42,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:42,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:42,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227171479] [2020-10-15 19:56:42,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:43,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:43,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:43,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:43,000 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-15 19:56:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:43,534 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-15 19:56:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:56:43,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:43,536 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:56:43,536 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:56:43,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:56:43,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-15 19:56:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:56:43,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-15 19:56:43,539 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-15 19:56:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:43,539 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-15 19:56:43,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-15 19:56:43,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:43,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:43,540 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:43,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:43,748 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-10-15 19:56:43,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:43,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888661325] [2020-10-15 19:56:43,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:43,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888661325] [2020-10-15 19:56:43,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930994816] [2020-10-15 19:56:43,887 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 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 [2020-10-15 19:56:43,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:43,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:44,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106508768] [2020-10-15 19:56:44,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:44,101 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-15 19:56:44,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:44,276 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-15 19:56:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 19:56:44,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:44,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:44,277 INFO L225 Difference]: With dead ends: 200 [2020-10-15 19:56:44,277 INFO L226 Difference]: Without dead ends: 198 [2020-10-15 19:56:44,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-15 19:56:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-15 19:56:44,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-15 19:56:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:56:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-15 19:56:44,279 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-15 19:56:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:44,280 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-15 19:56:44,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-15 19:56:44,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:44,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:44,280 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:44,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:44,484 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:44,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:44,484 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-10-15 19:56:44,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:44,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857171280] [2020-10-15 19:56:44,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857171280] [2020-10-15 19:56:44,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666114982] [2020-10-15 19:56:44,598 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 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 [2020-10-15 19:56:44,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:44,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:44,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:44,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543637177] [2020-10-15 19:56:44,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:44,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:44,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:44,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:44,812 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-15 19:56:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:45,178 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-15 19:56:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:56:45,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:45,180 INFO L225 Difference]: With dead ends: 221 [2020-10-15 19:56:45,180 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 19:56:45,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:56:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 19:56:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-15 19:56:45,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-15 19:56:45,184 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-15 19:56:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:45,184 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-15 19:56:45,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:45,185 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-15 19:56:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:45,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:45,185 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:45,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-15 19:56:45,394 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:45,395 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-10-15 19:56:45,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:45,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483355860] [2020-10-15 19:56:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483355860] [2020-10-15 19:56:45,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614864225] [2020-10-15 19:56:45,516 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 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 [2020-10-15 19:56:45,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:45,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-15 19:56:45,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:45,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:45,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-15 19:56:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442927486] [2020-10-15 19:56:45,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 19:56:45,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 19:56:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-15 19:56:45,583 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-15 19:56:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:45,780 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-15 19:56:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 19:56:45,781 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-15 19:56:45,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:45,781 INFO L225 Difference]: With dead ends: 201 [2020-10-15 19:56:45,781 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 19:56:45,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:56:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 19:56:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-15 19:56:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:56:45,785 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:56:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:45,785 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:56:45,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 19:56:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:56:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:45,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:45,786 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:45,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:45,986 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:45,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:45,987 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-10-15 19:56:45,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:45,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267815884] [2020-10-15 19:56:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267815884] [2020-10-15 19:56:46,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931367343] [2020-10-15 19:56:46,096 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 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 [2020-10-15 19:56:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:46,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:46,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:46,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:46,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651446150] [2020-10-15 19:56:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:46,360 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:46,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:46,857 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-15 19:56:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:46,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:46,859 INFO L225 Difference]: With dead ends: 226 [2020-10-15 19:56:46,859 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 19:56:46,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:46,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 19:56:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-15 19:56:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:56:46,863 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:56:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:46,863 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:56:46,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:56:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:46,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:46,863 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:47,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:47,064 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-10-15 19:56:47,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:47,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517292901] [2020-10-15 19:56:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517292901] [2020-10-15 19:56:47,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961508231] [2020-10-15 19:56:47,167 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 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 [2020-10-15 19:56:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:47,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:47,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:47,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:47,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:47,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147720072] [2020-10-15 19:56:47,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:47,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:47,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:47,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:47,402 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:56:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:47,824 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-15 19:56:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 19:56:47,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:47,826 INFO L225 Difference]: With dead ends: 218 [2020-10-15 19:56:47,826 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 19:56:47,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 19:56:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-15 19:56:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:47,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:56:47,829 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:56:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:47,829 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:56:47,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:56:47,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:47,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:47,830 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:48,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:48,031 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-10-15 19:56:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:48,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474864087] [2020-10-15 19:56:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474864087] [2020-10-15 19:56:48,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282573799] [2020-10-15 19:56:48,143 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 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 [2020-10-15 19:56:48,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:56:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:48,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:48,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:48,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:48,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:48,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359084716] [2020-10-15 19:56:48,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:48,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:48,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:48,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:48,398 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:49,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:49,079 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-15 19:56:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 19:56:49,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:49,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:49,081 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:56:49,081 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:56:49,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:56:49,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:56:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-15 19:56:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:56:49,084 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:56:49,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:49,084 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:56:49,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:49,085 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:56:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:49,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:49,085 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:49,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:49,286 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:49,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-10-15 19:56:49,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:49,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604316436] [2020-10-15 19:56:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:49,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604316436] [2020-10-15 19:56:49,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068839475] [2020-10-15 19:56:49,395 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 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 [2020-10-15 19:56:49,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:56:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:49,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:49,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:56:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:49,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:49,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:49,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359991051] [2020-10-15 19:56:49,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:49,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:49,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:49,626 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:50,149 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-15 19:56:50,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:50,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:50,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:50,150 INFO L225 Difference]: With dead ends: 238 [2020-10-15 19:56:50,150 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:50,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 19:56:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:56:50,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:56:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:56:50,153 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:56:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:50,153 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:56:50,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:56:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:50,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:50,154 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:50,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:50,355 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-10-15 19:56:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:50,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233724024] [2020-10-15 19:56:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233724024] [2020-10-15 19:56:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120722278] [2020-10-15 19:56:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:56:50,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:56:50,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:50,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:50,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:50,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:50,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405250119] [2020-10-15 19:56:50,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:50,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:50,763 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:56:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:51,406 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-15 19:56:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:56:51,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:51,407 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:56:51,407 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:56:51,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:56:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:56:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-15 19:56:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:56:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-15 19:56:51,410 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-15 19:56:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:51,410 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-15 19:56:51,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-15 19:56:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:51,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:51,411 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:51,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:56:51,616 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-10-15 19:56:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:51,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015291570] [2020-10-15 19:56:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:51,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015291570] [2020-10-15 19:56:51,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828929329] [2020-10-15 19:56:51,718 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 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 [2020-10-15 19:56:51,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:56:51,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:51,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:51,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:51,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:51,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:51,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254621848] [2020-10-15 19:56:51,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:51,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:51,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:51,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:51,991 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-15 19:56:52,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:52,640 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-15 19:56:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:56:52,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:52,641 INFO L225 Difference]: With dead ends: 252 [2020-10-15 19:56:52,641 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 19:56:52,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-15 19:56:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 19:56:52,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-15 19:56:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:56:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-15 19:56:52,646 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-15 19:56:52,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:52,646 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-15 19:56:52,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:52,646 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-15 19:56:52,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:52,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:52,646 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:52,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-15 19:56:52,847 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:52,848 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-10-15 19:56:52,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:52,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311143407] [2020-10-15 19:56:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:52,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311143407] [2020-10-15 19:56:52,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008566074] [2020-10-15 19:56:52,943 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 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 [2020-10-15 19:56:52,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:52,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:53,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:53,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:53,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:53,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281507537] [2020-10-15 19:56:53,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:53,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:53,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:56:53,229 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-15 19:56:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:56:54,057 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-15 19:56:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:56:54,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:56:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:56:54,059 INFO L225 Difference]: With dead ends: 258 [2020-10-15 19:56:54,059 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:56:54,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:56:54,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:56:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:56:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:56:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:56:54,063 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:56:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:56:54,064 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:56:54,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:56:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:56:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:56:54,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:56:54,064 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:56:54,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-15 19:56:54,270 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:56:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:56:54,271 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-10-15 19:56:54,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:56:54,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394924298] [2020-10-15 19:56:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:56:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:56:54,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394924298] [2020-10-15 19:56:54,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920841060] [2020-10-15 19:56:54,388 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 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 [2020-10-15 19:56:54,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:56:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:56:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:56:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:56:56,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:56:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:56:56,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:56:56,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:56:56,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667719748] [2020-10-15 19:56:56,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:56:56,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:56:56,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:56:56,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:56:56,722 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:57:01,044 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-15 19:57:05,311 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-15 19:57:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:05,924 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-15 19:57:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:57:05,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:05,926 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:57:05,926 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 19:57:05,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:57:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 19:57:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-15 19:57:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-15 19:57:05,933 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-15 19:57:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:05,933 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-15 19:57:05,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:05,933 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-15 19:57:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:05,934 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:06,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-15 19:57:06,136 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:06,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:06,137 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-10-15 19:57:06,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:06,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098804375] [2020-10-15 19:57:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:06,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098804375] [2020-10-15 19:57:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778534273] [2020-10-15 19:57:06,259 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 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 [2020-10-15 19:57:06,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:06,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:06,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:06,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:06,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:06,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:06,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:06,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114410592] [2020-10-15 19:57:06,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:06,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:06,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:06,561 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:07,417 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-10-15 19:57:07,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:57:07,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:07,418 INFO L225 Difference]: With dead ends: 260 [2020-10-15 19:57:07,418 INFO L226 Difference]: Without dead ends: 255 [2020-10-15 19:57:07,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:57:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-15 19:57:07,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-10-15 19:57:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 19:57:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-15 19:57:07,422 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-15 19:57:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:07,423 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-15 19:57:07,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-15 19:57:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:07,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:07,423 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:07,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:07,624 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-10-15 19:57:07,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:07,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984133803] [2020-10-15 19:57:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:07,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984133803] [2020-10-15 19:57:07,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718331807] [2020-10-15 19:57:07,732 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 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 [2020-10-15 19:57:07,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:07,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:08,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:08,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:08,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836916202] [2020-10-15 19:57:08,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:08,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:08,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:08,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:08,023 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-15 19:57:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:08,525 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-15 19:57:08,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:08,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:08,527 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:08,527 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:08,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:08,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-15 19:57:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-15 19:57:08,531 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-15 19:57:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:08,531 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-15 19:57:08,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-15 19:57:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:08,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:08,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:08,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:08,733 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:08,733 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-10-15 19:57:08,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:08,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019316918] [2020-10-15 19:57:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:08,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019316918] [2020-10-15 19:57:08,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136655590] [2020-10-15 19:57:08,847 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 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 [2020-10-15 19:57:08,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:08,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:08,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:12,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:12,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:12,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865040328] [2020-10-15 19:57:12,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:12,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:12,849 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-15 19:57:17,179 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:23,607 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-15 19:57:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:23,607 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:23,608 INFO L225 Difference]: With dead ends: 241 [2020-10-15 19:57:23,608 INFO L226 Difference]: Without dead ends: 239 [2020-10-15 19:57:23,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-15 19:57:23,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-15 19:57:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-15 19:57:23,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:57:23,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-15 19:57:23,611 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-15 19:57:23,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:23,611 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-15 19:57:23,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-15 19:57:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:23,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:23,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-15 19:57:23,812 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:23,813 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-10-15 19:57:23,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:23,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974882254] [2020-10-15 19:57:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:23,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974882254] [2020-10-15 19:57:23,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608189161] [2020-10-15 19:57:23,922 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 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 [2020-10-15 19:57:23,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:57:23,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:23,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:24,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:24,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:24,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791380345] [2020-10-15 19:57:24,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:24,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:24,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:24,335 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-15 19:57:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:24,839 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-15 19:57:24,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:57:24,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:24,841 INFO L225 Difference]: With dead ends: 235 [2020-10-15 19:57:24,841 INFO L226 Difference]: Without dead ends: 233 [2020-10-15 19:57:24,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:57:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-15 19:57:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-15 19:57:24,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:57:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-15 19:57:24,845 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-15 19:57:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:24,845 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-15 19:57:24,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-15 19:57:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:24,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:24,846 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:25,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:25,046 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:25,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:25,047 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-10-15 19:57:25,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:25,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231258244] [2020-10-15 19:57:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231258244] [2020-10-15 19:57:25,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009182791] [2020-10-15 19:57:25,166 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 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 [2020-10-15 19:57:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:25,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:25,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:25,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:25,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067507824] [2020-10-15 19:57:25,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:25,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:25,444 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-15 19:57:26,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:26,229 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-15 19:57:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:57:26,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:26,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:26,230 INFO L225 Difference]: With dead ends: 254 [2020-10-15 19:57:26,231 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 19:57:26,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:57:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 19:57:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-15 19:57:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:57:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-15 19:57:26,234 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-15 19:57:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:26,234 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-15 19:57:26,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-15 19:57:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:26,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:26,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:26,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-15 19:57:26,435 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:26,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:26,436 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-10-15 19:57:26,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:26,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103405502] [2020-10-15 19:57:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:26,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103405502] [2020-10-15 19:57:26,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635178861] [2020-10-15 19:57:26,554 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 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 [2020-10-15 19:57:26,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:57:26,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:26,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:26,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:28,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:28,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:28,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186367818] [2020-10-15 19:57:28,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:28,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:28,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:28,311 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-15 19:57:32,770 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:57:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:47,575 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-15 19:57:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 19:57:47,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:47,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:47,577 INFO L225 Difference]: With dead ends: 264 [2020-10-15 19:57:47,577 INFO L226 Difference]: Without dead ends: 262 [2020-10-15 19:57:47,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-10-15 19:57:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-15 19:57:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-15 19:57:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:57:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 19:57:47,581 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 19:57:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:47,581 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 19:57:47,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 19:57:47,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:47,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:47,582 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:47,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:47,783 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:47,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:47,783 INFO L82 PathProgramCache]: Analyzing trace with hash -742370563, now seen corresponding path program 165 times [2020-10-15 19:57:47,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:47,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890079192] [2020-10-15 19:57:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:47,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890079192] [2020-10-15 19:57:47,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224516559] [2020-10-15 19:57:47,930 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 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 [2020-10-15 19:57:47,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:57:47,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:49,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:49,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665107262] [2020-10-15 19:57:49,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:49,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:49,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:49,294 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 19:57:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:50,082 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-15 19:57:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 19:57:50,083 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:50,084 INFO L225 Difference]: With dead ends: 255 [2020-10-15 19:57:50,084 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 19:57:50,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:57:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 19:57:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-15 19:57:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:57:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:57:50,087 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:57:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:50,087 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:57:50,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:57:50,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:50,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:50,088 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:50,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:57:50,289 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash -742349204, now seen corresponding path program 166 times [2020-10-15 19:57:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:50,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628477219] [2020-10-15 19:57:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628477219] [2020-10-15 19:57:50,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138361992] [2020-10-15 19:57:50,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:57:50,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:57:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:50,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:57:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:50,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:50,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:50,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474979400] [2020-10-15 19:57:50,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:50,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:50,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:50,714 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:57:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:51,751 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-15 19:57:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:57:51,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:51,752 INFO L225 Difference]: With dead ends: 256 [2020-10-15 19:57:51,752 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 19:57:51,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:57:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 19:57:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-15 19:57:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:57:51,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:57:51,755 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:57:51,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:51,755 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:57:51,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:51,756 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:57:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:51,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:51,756 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:51,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-15 19:57:51,957 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:51,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:51,957 INFO L82 PathProgramCache]: Analyzing trace with hash -742348243, now seen corresponding path program 167 times [2020-10-15 19:57:51,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:51,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426997528] [2020-10-15 19:57:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:52,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426997528] [2020-10-15 19:57:52,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354774206] [2020-10-15 19:57:52,079 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 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 [2020-10-15 19:57:52,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:57:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:52,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,376 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,379 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:57:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:52,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:52,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:52,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713205335] [2020-10-15 19:57:52,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:52,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:52,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:57:52,451 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:57:53,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:57:53,868 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-10-15 19:57:53,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:57:53,869 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:57:53,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:57:53,870 INFO L225 Difference]: With dead ends: 279 [2020-10-15 19:57:53,870 INFO L226 Difference]: Without dead ends: 274 [2020-10-15 19:57:53,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:57:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-15 19:57:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-10-15 19:57:53,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:57:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-15 19:57:53,875 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-15 19:57:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:57:53,875 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-15 19:57:53,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:57:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-15 19:57:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:57:53,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:57:53,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:57:54,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-15 19:57:54,087 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:57:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:57:54,088 INFO L82 PathProgramCache]: Analyzing trace with hash -742340772, now seen corresponding path program 168 times [2020-10-15 19:57:54,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:57:54,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548995270] [2020-10-15 19:57:54,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:57:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:57:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548995270] [2020-10-15 19:57:54,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487755082] [2020-10-15 19:57:54,207 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 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 [2020-10-15 19:57:54,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:57:54,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:57:54,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:57:54,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:57:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:57:56,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:57:56,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:57:56,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705666575] [2020-10-15 19:57:56,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:57:56,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:57:56,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:57:56,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:57:56,784 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-15 19:58:01,160 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:58:05,448 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 19:58:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:06,117 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-15 19:58:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 19:58:06,119 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:06,120 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:58:06,120 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:58:06,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-15 19:58:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:58:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-15 19:58:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:58:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 19:58:06,125 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 19:58:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:06,125 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 19:58:06,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:06,125 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 19:58:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:06,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:06,126 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:06,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-15 19:58:06,332 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -742319413, now seen corresponding path program 169 times [2020-10-15 19:58:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:06,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044882673] [2020-10-15 19:58:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:06,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044882673] [2020-10-15 19:58:06,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894391729] [2020-10-15 19:58:06,445 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 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 [2020-10-15 19:58:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:15,554 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-15 19:58:15,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:15,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:58:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:15,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:15,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:15,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270612763] [2020-10-15 19:58:15,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:15,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=179, Unknown=6, NotChecked=0, Total=272 [2020-10-15 19:58:15,620 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 19:58:20,018 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-15 19:58:22,264 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-10-15 19:58:26,411 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-15 19:58:35,134 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-10-15 19:58:37,658 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-15 19:58:43,209 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-15 19:58:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:47,378 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-10-15 19:58:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:58:47,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:47,382 INFO L225 Difference]: With dead ends: 299 [2020-10-15 19:58:47,382 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 19:58:47,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=434, Invalid=961, Unknown=11, NotChecked=0, Total=1406 [2020-10-15 19:58:47,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 19:58:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-10-15 19:58:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 19:58:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-15 19:58:47,386 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-15 19:58:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:47,386 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-15 19:58:47,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-15 19:58:47,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:47,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:47,386 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-15 19:58:47,587 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:47,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:47,588 INFO L82 PathProgramCache]: Analyzing trace with hash -742318452, now seen corresponding path program 170 times [2020-10-15 19:58:47,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:47,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969962030] [2020-10-15 19:58:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:47,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969962030] [2020-10-15 19:58:47,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218104867] [2020-10-15 19:58:47,721 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 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 [2020-10-15 19:58:47,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:58:47,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:47,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:47,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:50,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:50,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:50,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:50,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544113663] [2020-10-15 19:58:50,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:50,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:50,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:50,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-15 19:58:50,116 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-15 19:58:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:52,039 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-15 19:58:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:58:52,040 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:52,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:52,041 INFO L225 Difference]: With dead ends: 292 [2020-10-15 19:58:52,041 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 19:58:52,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-15 19:58:52,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 19:58:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-15 19:58:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 19:58:52,044 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 19:58:52,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:52,045 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 19:58:52,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:52,045 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 19:58:52,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:52,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:52,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:52,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-15 19:58:52,246 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:52,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:52,246 INFO L82 PathProgramCache]: Analyzing trace with hash -742110132, now seen corresponding path program 171 times [2020-10-15 19:58:52,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:52,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667702797] [2020-10-15 19:58:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667702797] [2020-10-15 19:58:52,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890271050] [2020-10-15 19:58:52,399 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 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 [2020-10-15 19:58:52,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:58:52,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:52,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:52,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:52,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:52,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:52,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979103711] [2020-10-15 19:58:52,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:52,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:52,786 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 19:58:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:53,419 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-15 19:58:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 19:58:53,420 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:53,421 INFO L225 Difference]: With dead ends: 231 [2020-10-15 19:58:53,421 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 19:58:53,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:58:53,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 19:58:53,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-15 19:58:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 19:58:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-15 19:58:53,425 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-15 19:58:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:53,425 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-15 19:58:53,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-15 19:58:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:53,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:53,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:53,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-15 19:58:53,627 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:53,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash -741447042, now seen corresponding path program 172 times [2020-10-15 19:58:53,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:53,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734977722] [2020-10-15 19:58:53,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:53,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734977722] [2020-10-15 19:58:53,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322898506] [2020-10-15 19:58:53,785 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 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 [2020-10-15 19:58:53,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:58:53,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:53,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:54,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:54,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:54,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064415391] [2020-10-15 19:58:54,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:54,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:54,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:54,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:54,176 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-15 19:58:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:55,231 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-15 19:58:55,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 19:58:55,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:55,233 INFO L225 Difference]: With dead ends: 250 [2020-10-15 19:58:55,233 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 19:58:55,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:58:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 19:58:55,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-15 19:58:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:58:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-15 19:58:55,237 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-15 19:58:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:55,237 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-15 19:58:55,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:55,238 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-15 19:58:55,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:55,238 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:55,238 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:55,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:55,439 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:55,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:55,439 INFO L82 PathProgramCache]: Analyzing trace with hash -741424722, now seen corresponding path program 173 times [2020-10-15 19:58:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:55,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087473546] [2020-10-15 19:58:55,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087473546] [2020-10-15 19:58:55,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542451445] [2020-10-15 19:58:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:58:55,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:58:55,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:55,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:58:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:55,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:55,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656557152] [2020-10-15 19:58:55,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:55,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:55,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:55,960 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-15 19:58:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:57,589 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-15 19:58:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:58:57,590 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:57,591 INFO L225 Difference]: With dead ends: 288 [2020-10-15 19:58:57,591 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 19:58:57,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 19:58:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 19:58:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-15 19:58:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 19:58:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-15 19:58:57,594 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-15 19:58:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:57,595 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-15 19:58:57,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-15 19:58:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:57,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:57,595 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:57,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-15 19:58:57,796 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:57,796 INFO L82 PathProgramCache]: Analyzing trace with hash -541944403, now seen corresponding path program 174 times [2020-10-15 19:58:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:57,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776116735] [2020-10-15 19:58:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:57,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776116735] [2020-10-15 19:58:57,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309593541] [2020-10-15 19:58:57,928 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 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 [2020-10-15 19:58:57,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:58:57,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:58:57,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:58,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:58,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299209614] [2020-10-15 19:58:58,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:58,220 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-15 19:58:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:58:59,041 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-15 19:58:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:58:59,043 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:58:59,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:58:59,044 INFO L225 Difference]: With dead ends: 236 [2020-10-15 19:58:59,044 INFO L226 Difference]: Without dead ends: 234 [2020-10-15 19:58:59,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:58:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-15 19:58:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-15 19:58:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:58:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:58:59,048 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:58:59,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:58:59,048 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:58:59,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:58:59,049 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:58:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:58:59,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:58:59,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:58:59,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:58:59,257 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:58:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:58:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash -541943442, now seen corresponding path program 175 times [2020-10-15 19:58:59,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:58:59,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474775556] [2020-10-15 19:58:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:58:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474775556] [2020-10-15 19:58:59,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222285129] [2020-10-15 19:58:59,396 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 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 [2020-10-15 19:58:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:58:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:58:59,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:58:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:58:59,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:58:59,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:58:59,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074283625] [2020-10-15 19:58:59,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:58:59,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:58:59,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:58:59,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:58:59,719 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:00,341 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-15 19:59:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 19:59:00,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:00,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:00,343 INFO L225 Difference]: With dead ends: 246 [2020-10-15 19:59:00,343 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 19:59:00,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-15 19:59:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 19:59:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-15 19:59:00,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:00,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:59:00,346 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:59:00,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:00,346 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:59:00,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:00,347 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:59:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:00,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:00,347 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:00,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:00,548 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash -541914612, now seen corresponding path program 176 times [2020-10-15 19:59:00,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:00,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290244864] [2020-10-15 19:59:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:00,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290244864] [2020-10-15 19:59:00,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547610419] [2020-10-15 19:59:00,695 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 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 [2020-10-15 19:59:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:00,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:00,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:00,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073756835] [2020-10-15 19:59:00,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:00,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:00,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:00,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:00,973 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:01,481 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-15 19:59:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 19:59:01,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:01,483 INFO L225 Difference]: With dead ends: 239 [2020-10-15 19:59:01,484 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 19:59:01,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-15 19:59:01,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 19:59:01,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-15 19:59:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 19:59:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-15 19:59:01,487 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-15 19:59:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:01,487 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-15 19:59:01,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-15 19:59:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:01,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:01,488 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:01,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:01,689 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash -540990130, now seen corresponding path program 177 times [2020-10-15 19:59:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:01,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138223413] [2020-10-15 19:59:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138223413] [2020-10-15 19:59:01,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131179208] [2020-10-15 19:59:01,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:59:01,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:01,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:01,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:02,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:02,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630665470] [2020-10-15 19:59:02,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:02,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:02,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:02,108 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-15 19:59:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:02,583 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-15 19:59:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 19:59:02,584 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:02,585 INFO L225 Difference]: With dead ends: 229 [2020-10-15 19:59:02,585 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 19:59:02,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 19:59:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 19:59:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 19:59:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 19:59:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 19:59:02,589 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 19:59:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:02,589 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 19:59:02,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 19:59:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:02,590 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:02,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-15 19:59:02,791 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 95285087, now seen corresponding path program 178 times [2020-10-15 19:59:02,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:02,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562561345] [2020-10-15 19:59:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:02,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562561345] [2020-10-15 19:59:02,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805628083] [2020-10-15 19:59:02,926 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 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 [2020-10-15 19:59:02,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:02,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:02,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:02,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:03,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:03,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:03,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161820922] [2020-10-15 19:59:03,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:03,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:03,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:03,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:03,232 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 19:59:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:04,199 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-15 19:59:04,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:04,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:04,201 INFO L225 Difference]: With dead ends: 261 [2020-10-15 19:59:04,202 INFO L226 Difference]: Without dead ends: 259 [2020-10-15 19:59:04,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:59:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-15 19:59:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-15 19:59:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 19:59:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-15 19:59:04,205 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-15 19:59:04,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:04,205 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-15 19:59:04,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:04,205 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-15 19:59:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:04,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:04,205 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:04,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:04,406 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:04,407 INFO L82 PathProgramCache]: Analyzing trace with hash 95286048, now seen corresponding path program 179 times [2020-10-15 19:59:04,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:04,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019178140] [2020-10-15 19:59:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:04,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019178140] [2020-10-15 19:59:04,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881524539] [2020-10-15 19:59:04,548 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 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 [2020-10-15 19:59:04,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:04,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:04,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:04,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:04,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:04,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858475122] [2020-10-15 19:59:04,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:04,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:04,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:04,855 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-15 19:59:05,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:05,793 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-15 19:59:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:05,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:05,795 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:59:05,795 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:59:05,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 19:59:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:59:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-15 19:59:05,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 19:59:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-15 19:59:05,798 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-15 19:59:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:05,798 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-15 19:59:05,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-15 19:59:05,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:05,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:05,799 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:06,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-15 19:59:06,006 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash 95314878, now seen corresponding path program 180 times [2020-10-15 19:59:06,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:06,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706491320] [2020-10-15 19:59:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706491320] [2020-10-15 19:59:06,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563840934] [2020-10-15 19:59:06,159 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 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 [2020-10-15 19:59:06,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:06,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:06,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:06,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:06,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:06,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:06,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052493145] [2020-10-15 19:59:06,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:06,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:06,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:06,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:06,450 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-15 19:59:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:07,247 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-15 19:59:07,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 19:59:07,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:07,249 INFO L225 Difference]: With dead ends: 253 [2020-10-15 19:59:07,249 INFO L226 Difference]: Without dead ends: 251 [2020-10-15 19:59:07,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-15 19:59:07,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-15 19:59:07,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:59:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 19:59:07,253 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 19:59:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:07,253 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 19:59:07,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 19:59:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:07,254 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:07,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-15 19:59:07,455 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:07,455 INFO L82 PathProgramCache]: Analyzing trace with hash 115840877, now seen corresponding path program 181 times [2020-10-15 19:59:07,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:07,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600535735] [2020-10-15 19:59:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:07,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600535735] [2020-10-15 19:59:07,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431982947] [2020-10-15 19:59:07,605 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 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 [2020-10-15 19:59:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:07,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:07,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:07,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:07,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:07,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162026934] [2020-10-15 19:59:07,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:07,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:07,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:07,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:07,902 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 19:59:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:08,960 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-15 19:59:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:08,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:08,962 INFO L225 Difference]: With dead ends: 268 [2020-10-15 19:59:08,962 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 19:59:08,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:59:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 19:59:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-15 19:59:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 19:59:08,967 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 19:59:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:08,967 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 19:59:08,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 19:59:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:08,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:08,967 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:09,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:09,168 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:09,169 INFO L82 PathProgramCache]: Analyzing trace with hash 115841838, now seen corresponding path program 182 times [2020-10-15 19:59:09,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:09,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378365024] [2020-10-15 19:59:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:09,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378365024] [2020-10-15 19:59:09,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679170527] [2020-10-15 19:59:09,322 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 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 [2020-10-15 19:59:09,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:09,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:09,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:09,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152303340] [2020-10-15 19:59:09,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:09,658 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 19:59:10,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:10,717 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-15 19:59:10,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-15 19:59:10,718 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:10,718 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:59:10,719 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:59:10,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:59:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:59:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 19:59:10,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 19:59:10,723 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 19:59:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:10,723 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 19:59:10,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:10,723 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 19:59:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:10,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:10,723 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:10,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-15 19:59:10,924 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:10,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:10,925 INFO L82 PathProgramCache]: Analyzing trace with hash 116503967, now seen corresponding path program 183 times [2020-10-15 19:59:10,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:10,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047853430] [2020-10-15 19:59:10,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047853430] [2020-10-15 19:59:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203071529] [2020-10-15 19:59:11,061 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 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 [2020-10-15 19:59:11,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:11,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:11,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-15 19:59:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:11,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:11,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-10-15 19:59:11,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270603742] [2020-10-15 19:59:11,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 19:59:11,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:11,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 19:59:11,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-15 19:59:11,267 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 16 states. [2020-10-15 19:59:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:12,241 INFO L93 Difference]: Finished difference Result 249 states and 587 transitions. [2020-10-15 19:59:12,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:12,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-10-15 19:59:12,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:12,243 INFO L225 Difference]: With dead ends: 249 [2020-10-15 19:59:12,243 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 19:59:12,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-10-15 19:59:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 19:59:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2020-10-15 19:59:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:12,247 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:12,247 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:12,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 19:59:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:12,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:12,248 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:12,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-15 19:59:12,449 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:12,449 INFO L82 PathProgramCache]: Analyzing trace with hash 116525326, now seen corresponding path program 184 times [2020-10-15 19:59:12,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:12,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775418197] [2020-10-15 19:59:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:12,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775418197] [2020-10-15 19:59:12,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13562468] [2020-10-15 19:59:12,602 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 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 [2020-10-15 19:59:12,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:12,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:12,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:12,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:12,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:12,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:12,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:12,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58074824] [2020-10-15 19:59:12,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:12,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:12,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:12,860 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:13,886 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-15 19:59:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:13,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:13,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:13,889 INFO L225 Difference]: With dead ends: 248 [2020-10-15 19:59:13,889 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 19:59:13,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 19:59:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 19:59:13,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-15 19:59:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:13,893 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:13,893 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:13,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:13,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:13,894 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:14,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:14,094 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:14,095 INFO L82 PathProgramCache]: Analyzing trace with hash 116526287, now seen corresponding path program 185 times [2020-10-15 19:59:14,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:14,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823491060] [2020-10-15 19:59:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:14,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823491060] [2020-10-15 19:59:14,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360254624] [2020-10-15 19:59:14,246 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 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 [2020-10-15 19:59:14,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:59:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:14,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:59:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:14,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:14,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:14,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200734812] [2020-10-15 19:59:14,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:14,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:14,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:14,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:14,568 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:15,969 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-15 19:59:15,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 19:59:15,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:15,971 INFO L225 Difference]: With dead ends: 287 [2020-10-15 19:59:15,971 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 19:59:15,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 19:59:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 19:59:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-15 19:59:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-15 19:59:15,974 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-15 19:59:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:15,974 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-15 19:59:15,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-15 19:59:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:15,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:15,975 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:16,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:16,176 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash 116533758, now seen corresponding path program 186 times [2020-10-15 19:59:16,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:16,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443191331] [2020-10-15 19:59:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443191331] [2020-10-15 19:59:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202822254] [2020-10-15 19:59:16,361 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 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 [2020-10-15 19:59:16,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-15 19:59:16,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:16,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:16,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:16,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88187824] [2020-10-15 19:59:16,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:16,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:16,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:16,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:16,862 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-15 19:59:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:18,643 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-15 19:59:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:59:18,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:18,646 INFO L225 Difference]: With dead ends: 284 [2020-10-15 19:59:18,646 INFO L226 Difference]: Without dead ends: 282 [2020-10-15 19:59:18,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-15 19:59:18,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-15 19:59:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-15 19:59:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-15 19:59:18,650 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-15 19:59:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:18,650 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-15 19:59:18,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-15 19:59:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:18,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:18,651 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:18,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:18,852 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:18,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash 116555117, now seen corresponding path program 187 times [2020-10-15 19:59:18,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:18,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394544554] [2020-10-15 19:59:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:19,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394544554] [2020-10-15 19:59:19,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547266792] [2020-10-15 19:59:19,015 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 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 [2020-10-15 19:59:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:19,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:19,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:19,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:19,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:19,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282698821] [2020-10-15 19:59:19,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:19,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:19,355 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-15 19:59:20,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:20,828 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-15 19:59:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 19:59:20,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:20,830 INFO L225 Difference]: With dead ends: 289 [2020-10-15 19:59:20,830 INFO L226 Difference]: Without dead ends: 284 [2020-10-15 19:59:20,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 19:59:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-15 19:59:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-15 19:59:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 19:59:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-15 19:59:20,834 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-15 19:59:20,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:20,834 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-15 19:59:20,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:20,834 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-15 19:59:20,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:20,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:20,834 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:21,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:21,035 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash 116556078, now seen corresponding path program 188 times [2020-10-15 19:59:21,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:21,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382362444] [2020-10-15 19:59:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382362444] [2020-10-15 19:59:21,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414404223] [2020-10-15 19:59:21,189 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 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 [2020-10-15 19:59:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:21,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:21,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:59:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:21,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:21,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607191143] [2020-10-15 19:59:21,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:21,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:21,504 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-15 19:59:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:23,300 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-15 19:59:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 19:59:23,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:23,302 INFO L225 Difference]: With dead ends: 312 [2020-10-15 19:59:23,302 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 19:59:23,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:59:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 19:59:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-15 19:59:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 19:59:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-15 19:59:23,307 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-15 19:59:23,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:23,307 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-15 19:59:23,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-15 19:59:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:23,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:23,307 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:23,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:23,508 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:23,509 INFO L82 PathProgramCache]: Analyzing trace with hash 116764398, now seen corresponding path program 189 times [2020-10-15 19:59:23,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:23,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507889742] [2020-10-15 19:59:23,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:23,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507889742] [2020-10-15 19:59:23,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113689989] [2020-10-15 19:59:23,653 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 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 [2020-10-15 19:59:23,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:23,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:23,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:23,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:23,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825918811] [2020-10-15 19:59:23,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:23,947 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-15 19:59:24,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:24,931 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-15 19:59:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 19:59:24,932 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:24,933 INFO L225 Difference]: With dead ends: 262 [2020-10-15 19:59:24,933 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 19:59:24,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 19:59:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 19:59:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-15 19:59:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 19:59:24,937 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 19:59:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:24,937 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 19:59:24,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 19:59:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:24,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:24,938 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:25,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-15 19:59:25,146 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:25,147 INFO L82 PathProgramCache]: Analyzing trace with hash 117427488, now seen corresponding path program 190 times [2020-10-15 19:59:25,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:25,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420352093] [2020-10-15 19:59:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:25,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420352093] [2020-10-15 19:59:25,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974988283] [2020-10-15 19:59:25,306 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 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 [2020-10-15 19:59:25,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:25,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:25,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:25,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:25,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:25,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:25,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:25,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311694767] [2020-10-15 19:59:25,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:25,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:25,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:25,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:25,616 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 19:59:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:26,804 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-15 19:59:26,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:26,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:26,806 INFO L225 Difference]: With dead ends: 271 [2020-10-15 19:59:26,806 INFO L226 Difference]: Without dead ends: 269 [2020-10-15 19:59:26,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 19:59:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-15 19:59:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-15 19:59:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 19:59:26,810 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 19:59:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:26,810 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 19:59:26,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 19:59:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:26,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:26,811 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:27,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-15 19:59:27,012 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:27,013 INFO L82 PathProgramCache]: Analyzing trace with hash 117448847, now seen corresponding path program 191 times [2020-10-15 19:59:27,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:27,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135493991] [2020-10-15 19:59:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135493991] [2020-10-15 19:59:27,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931702598] [2020-10-15 19:59:27,174 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 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 [2020-10-15 19:59:27,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:59:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:27,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:27,424 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:27,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:27,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:27,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352967700] [2020-10-15 19:59:27,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:27,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:27,444 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 19:59:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:28,885 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-15 19:59:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 19:59:28,886 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:28,887 INFO L225 Difference]: With dead ends: 296 [2020-10-15 19:59:28,887 INFO L226 Difference]: Without dead ends: 288 [2020-10-15 19:59:28,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 19:59:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-15 19:59:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-15 19:59:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 19:59:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 19:59:28,891 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 19:59:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:28,891 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 19:59:28,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 19:59:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:28,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:28,892 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:29,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-15 19:59:29,093 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:29,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:29,093 INFO L82 PathProgramCache]: Analyzing trace with hash 117449808, now seen corresponding path program 192 times [2020-10-15 19:59:29,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:29,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739058710] [2020-10-15 19:59:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:29,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739058710] [2020-10-15 19:59:29,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149778187] [2020-10-15 19:59:29,259 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 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 [2020-10-15 19:59:29,298 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 19:59:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:29,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 19:59:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:29,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:29,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:29,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647955414] [2020-10-15 19:59:29,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:29,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:29,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:29,539 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 19:59:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:30,896 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-15 19:59:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 19:59:30,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:30,898 INFO L225 Difference]: With dead ends: 298 [2020-10-15 19:59:30,899 INFO L226 Difference]: Without dead ends: 290 [2020-10-15 19:59:30,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 19:59:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-15 19:59:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-15 19:59:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-15 19:59:30,908 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-15 19:59:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:30,908 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-15 19:59:30,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-15 19:59:30,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:30,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:30,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:31,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-15 19:59:31,109 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:31,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:31,110 INFO L82 PathProgramCache]: Analyzing trace with hash 117478638, now seen corresponding path program 193 times [2020-10-15 19:59:31,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:31,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790713787] [2020-10-15 19:59:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790713787] [2020-10-15 19:59:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899274366] [2020-10-15 19:59:31,252 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 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 [2020-10-15 19:59:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:31,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:31,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:31,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:31,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409441930] [2020-10-15 19:59:31,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:31,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:31,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:31,509 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-15 19:59:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:33,011 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-15 19:59:33,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 19:59:33,013 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:33,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:33,014 INFO L225 Difference]: With dead ends: 291 [2020-10-15 19:59:33,014 INFO L226 Difference]: Without dead ends: 283 [2020-10-15 19:59:33,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 19:59:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-15 19:59:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-15 19:59:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 19:59:33,017 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 19:59:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:33,018 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 19:59:33,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 19:59:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:33,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:33,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:33,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-15 19:59:33,219 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:33,219 INFO L82 PathProgramCache]: Analyzing trace with hash 144470028, now seen corresponding path program 194 times [2020-10-15 19:59:33,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:33,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500405158] [2020-10-15 19:59:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500405158] [2020-10-15 19:59:33,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207347625] [2020-10-15 19:59:33,376 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 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 [2020-10-15 19:59:33,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 19:59:33,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:33,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:33,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:33,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126102914] [2020-10-15 19:59:33,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:33,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:33,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:33,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:33,737 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 19:59:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:34,915 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-15 19:59:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 19:59:34,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:34,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:34,917 INFO L225 Difference]: With dead ends: 265 [2020-10-15 19:59:34,917 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 19:59:34,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 19:59:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 19:59:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-15 19:59:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 19:59:34,921 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 19:59:34,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:34,921 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 19:59:34,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 19:59:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:34,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:34,921 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:35,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:35,122 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash 145133118, now seen corresponding path program 195 times [2020-10-15 19:59:35,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:35,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374126072] [2020-10-15 19:59:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:35,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374126072] [2020-10-15 19:59:35,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609167598] [2020-10-15 19:59:35,266 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 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 [2020-10-15 19:59:35,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 19:59:35,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 19:59:35,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:35,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:35,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:35,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516602262] [2020-10-15 19:59:35,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:35,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:35,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:35,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:35,647 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-15 19:59:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:37,472 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-15 19:59:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 19:59:37,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:37,476 INFO L225 Difference]: With dead ends: 262 [2020-10-15 19:59:37,476 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 19:59:37,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 19:59:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 19:59:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-15 19:59:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 19:59:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 19:59:37,481 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 19:59:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:37,481 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 19:59:37,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 19:59:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:37,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:37,482 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:37,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-15 19:59:37,682 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:37,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:37,683 INFO L82 PathProgramCache]: Analyzing trace with hash 145155438, now seen corresponding path program 196 times [2020-10-15 19:59:37,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:37,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317619310] [2020-10-15 19:59:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317619310] [2020-10-15 19:59:37,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775046802] [2020-10-15 19:59:37,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 19:59:37,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 19:59:37,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:37,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:37,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:38,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:38,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:38,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 19:59:38,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990890619] [2020-10-15 19:59:38,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 19:59:38,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:38,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 19:59:38,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 19:59:38,305 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 19:59:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 19:59:40,645 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-15 19:59:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 19:59:40,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 19:59:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 19:59:40,646 INFO L225 Difference]: With dead ends: 285 [2020-10-15 19:59:40,646 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 19:59:40,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 19:59:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 19:59:40,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-15 19:59:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 19:59:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-15 19:59:40,650 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-15 19:59:40,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 19:59:40,650 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-15 19:59:40,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 19:59:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-15 19:59:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 19:59:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 19:59:40,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 19:59:40,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 19:59:40,852 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 19:59:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 19:59:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 145184268, now seen corresponding path program 197 times [2020-10-15 19:59:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 19:59:40,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591695485] [2020-10-15 19:59:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 19:59:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 19:59:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:41,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591695485] [2020-10-15 19:59:41,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168419920] [2020-10-15 19:59:41,024 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 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 [2020-10-15 19:59:41,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 19:59:41,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 19:59:41,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 19:59:41,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 19:59:45,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 19:59:51,583 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-10-15 19:59:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 19:59:51,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 19:59:51,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 19:59:51,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852737823] [2020-10-15 19:59:51,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 19:59:51,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 19:59:51,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 19:59:51,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-15 19:59:51,586 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-15 19:59:55,787 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-15 20:00:00,405 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:00:04,601 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-10-15 20:00:09,030 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-15 20:00:11,227 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:00:19,978 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-15 20:00:24,514 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-15 20:00:57,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:57,262 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-15 20:00:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:00:57,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:00:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:57,264 INFO L225 Difference]: With dead ends: 302 [2020-10-15 20:00:57,264 INFO L226 Difference]: Without dead ends: 297 [2020-10-15 20:00:57,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=565, Invalid=1408, Unknown=7, NotChecked=0, Total=1980 [2020-10-15 20:00:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-15 20:00:57,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-15 20:00:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:00:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-15 20:00:57,268 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-15 20:00:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:57,268 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-15 20:00:57,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:00:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-15 20:00:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:57,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:57,268 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:57,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:57,469 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:57,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:57,470 INFO L82 PathProgramCache]: Analyzing trace with hash 146086430, now seen corresponding path program 198 times [2020-10-15 20:00:57,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:57,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802568853] [2020-10-15 20:00:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:57,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802568853] [2020-10-15 20:00:57,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130373416] [2020-10-15 20:00:57,610 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 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 [2020-10-15 20:00:57,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:00:57,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:00:57,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:57,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:57,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:57,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:57,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314094902] [2020-10-15 20:00:57,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:57,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:57,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:57,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:57,881 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-15 20:00:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:58,356 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-15 20:00:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:00:58,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:58,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:58,358 INFO L225 Difference]: With dead ends: 219 [2020-10-15 20:00:58,358 INFO L226 Difference]: Without dead ends: 217 [2020-10-15 20:00:58,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:00:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-15 20:00:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-15 20:00:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:00:58,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-15 20:00:58,360 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-15 20:00:58,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:58,360 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-15 20:00:58,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:58,360 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-15 20:00:58,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:58,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:58,361 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:58,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:00:58,562 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash 146108750, now seen corresponding path program 199 times [2020-10-15 20:00:58,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:58,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916941021] [2020-10-15 20:00:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916941021] [2020-10-15 20:00:58,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433678902] [2020-10-15 20:00:58,704 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 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 [2020-10-15 20:00:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:00:58,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:00:58,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:00:58,924 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:00:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:00:58,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:00:58,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:00:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011433640] [2020-10-15 20:00:58,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:00:58,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:00:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:00:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:00:58,950 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-15 20:00:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:00:59,666 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-15 20:00:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:00:59,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:00:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:00:59,668 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:00:59,668 INFO L226 Difference]: Without dead ends: 224 [2020-10-15 20:00:59,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:00:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-15 20:00:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-15 20:00:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-15 20:00:59,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-15 20:00:59,677 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-15 20:00:59,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:00:59,677 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-15 20:00:59,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:00:59,678 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-15 20:00:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:00:59,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:00:59,678 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:00:59,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-15 20:00:59,879 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:00:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:00:59,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2034084541, now seen corresponding path program 200 times [2020-10-15 20:00:59,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:00:59,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953263574] [2020-10-15 20:00:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:00:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953263574] [2020-10-15 20:01:00,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145157210] [2020-10-15 20:01:00,056 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 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 [2020-10-15 20:01:00,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:00,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:00,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:00,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:00,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956541627] [2020-10-15 20:01:00,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:00,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:00,352 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-15 20:01:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:00,872 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:01:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:00,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:00,874 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:01:00,874 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:01:00,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:01:00,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:01:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-15 20:01:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-15 20:01:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-15 20:01:00,877 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-15 20:01:00,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-15 20:01:00,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:00,878 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-15 20:01:00,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:00,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:00,878 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:01,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-15 20:01:01,079 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:01,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:01,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2034085502, now seen corresponding path program 201 times [2020-10-15 20:01:01,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:01,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118786231] [2020-10-15 20:01:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:01,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118786231] [2020-10-15 20:01:01,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651927005] [2020-10-15 20:01:01,279 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 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 [2020-10-15 20:01:01,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:01:01,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:01,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:01,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:01,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444479609] [2020-10-15 20:01:01,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:01,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:01,623 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-15 20:01:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:02,243 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-15 20:01:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:02,244 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:02,244 INFO L225 Difference]: With dead ends: 237 [2020-10-15 20:01:02,245 INFO L226 Difference]: Without dead ends: 235 [2020-10-15 20:01:02,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-15 20:01:02,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-15 20:01:02,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:01:02,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-15 20:01:02,247 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-15 20:01:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:02,248 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-15 20:01:02,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-15 20:01:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:02,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:02,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:02,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-15 20:01:02,452 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:02,452 INFO L82 PathProgramCache]: Analyzing trace with hash 2034114332, now seen corresponding path program 202 times [2020-10-15 20:01:02,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:02,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704864075] [2020-10-15 20:01:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704864075] [2020-10-15 20:01:02,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685191979] [2020-10-15 20:01:02,629 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 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 [2020-10-15 20:01:02,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:02,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:02,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:02,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:03,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:03,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:03,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298360457] [2020-10-15 20:01:03,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:03,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:03,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:03,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:03,982 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-15 20:01:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:04,861 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:01:04,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:01:04,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:04,864 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:01:04,864 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:01:04,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:01:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-15 20:01:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-15 20:01:04,867 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-15 20:01:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:04,868 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-15 20:01:04,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-15 20:01:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:04,868 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:05,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-15 20:01:05,069 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009023, now seen corresponding path program 203 times [2020-10-15 20:01:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:05,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754334204] [2020-10-15 20:01:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:05,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:05,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754334204] [2020-10-15 20:01:05,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155022781] [2020-10-15 20:01:05,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:05,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:01:05,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:05,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:05,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:05,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:05,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53539676] [2020-10-15 20:01:05,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:05,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:05,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:05,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:05,601 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-15 20:01:06,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:06,213 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-15 20:01:06,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:01:06,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:06,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:06,216 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:06,216 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:06,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:01:06,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-15 20:01:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:01:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-15 20:01:06,223 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-15 20:01:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:06,223 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-15 20:01:06,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-15 20:01:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:06,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:06,224 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:06,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-15 20:01:06,424 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash 2062713692, now seen corresponding path program 204 times [2020-10-15 20:01:06,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:06,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852998032] [2020-10-15 20:01:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:06,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852998032] [2020-10-15 20:01:06,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413492337] [2020-10-15 20:01:06,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:06,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:06,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:06,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:06,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380969082] [2020-10-15 20:01:06,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:06,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:06,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:06,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:06,946 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-15 20:01:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:07,543 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-15 20:01:07,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:07,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:07,546 INFO L225 Difference]: With dead ends: 239 [2020-10-15 20:01:07,546 INFO L226 Difference]: Without dead ends: 237 [2020-10-15 20:01:07,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:01:07,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-15 20:01:07,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-15 20:01:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:01:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-15 20:01:07,550 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-15 20:01:07,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:07,550 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-15 20:01:07,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:07,550 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-15 20:01:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:07,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:07,550 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:07,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-15 20:01:07,751 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:07,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:07,752 INFO L82 PathProgramCache]: Analyzing trace with hash 2063667004, now seen corresponding path program 205 times [2020-10-15 20:01:07,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:07,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133407392] [2020-10-15 20:01:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133407392] [2020-10-15 20:01:07,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843628466] [2020-10-15 20:01:07,993 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 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 [2020-10-15 20:01:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:08,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:08,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:08,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:08,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:08,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048856477] [2020-10-15 20:01:08,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:08,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:08,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:08,323 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-15 20:01:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:08,735 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-15 20:01:08,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:01:08,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:08,738 INFO L225 Difference]: With dead ends: 220 [2020-10-15 20:01:08,738 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:01:08,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-15 20:01:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:01:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-15 20:01:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-15 20:01:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-15 20:01:08,741 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-15 20:01:08,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:08,742 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-15 20:01:08,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-15 20:01:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:08,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:08,742 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:08,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-15 20:01:08,943 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash 313362251, now seen corresponding path program 206 times [2020-10-15 20:01:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:08,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866013424] [2020-10-15 20:01:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866013424] [2020-10-15 20:01:09,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862044344] [2020-10-15 20:01:09,103 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 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 [2020-10-15 20:01:09,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:09,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:09,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:09,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:09,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:09,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:09,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539379402] [2020-10-15 20:01:09,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:09,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:09,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:09,445 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-15 20:01:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:10,058 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-15 20:01:10,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:10,060 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:10,060 INFO L225 Difference]: With dead ends: 229 [2020-10-15 20:01:10,061 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:01:10,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:01:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-15 20:01:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-15 20:01:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-15 20:01:10,064 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-15 20:01:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:10,064 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-15 20:01:10,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-15 20:01:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:10,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:10,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-15 20:01:10,265 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash 313363212, now seen corresponding path program 207 times [2020-10-15 20:01:10,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:10,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420987511] [2020-10-15 20:01:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:10,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420987511] [2020-10-15 20:01:10,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92569705] [2020-10-15 20:01:10,436 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 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 [2020-10-15 20:01:10,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:01:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:10,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:10,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:10,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:10,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705319748] [2020-10-15 20:01:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:10,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:10,803 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-15 20:01:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:11,410 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-15 20:01:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:01:11,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:11,413 INFO L225 Difference]: With dead ends: 233 [2020-10-15 20:01:11,413 INFO L226 Difference]: Without dead ends: 231 [2020-10-15 20:01:11,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:01:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-15 20:01:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-15 20:01:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-15 20:01:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-15 20:01:11,416 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-15 20:01:11,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:11,416 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-15 20:01:11,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:11,416 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-15 20:01:11,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:11,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:11,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:11,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:11,617 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash 313392042, now seen corresponding path program 208 times [2020-10-15 20:01:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693841944] [2020-10-15 20:01:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:11,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693841944] [2020-10-15 20:01:11,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033450220] [2020-10-15 20:01:11,784 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 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 [2020-10-15 20:01:11,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:13,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:13,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854148449] [2020-10-15 20:01:13,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:13,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:13,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:13,645 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-15 20:01:14,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:14,756 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-15 20:01:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:14,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:14,759 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:01:14,759 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:01:14,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:01:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:01:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-15 20:01:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-15 20:01:14,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-15 20:01:14,762 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-15 20:01:14,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:14,762 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-15 20:01:14,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:14,762 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-15 20:01:14,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:14,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:14,763 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:14,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:14,964 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash 314286733, now seen corresponding path program 209 times [2020-10-15 20:01:14,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:14,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705174912] [2020-10-15 20:01:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:15,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705174912] [2020-10-15 20:01:15,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780776581] [2020-10-15 20:01:15,135 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 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 [2020-10-15 20:01:15,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:01:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:15,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:15,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:15,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:15,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472626872] [2020-10-15 20:01:15,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:15,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:15,498 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-15 20:01:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:16,221 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-15 20:01:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:16,222 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:16,223 INFO L225 Difference]: With dead ends: 246 [2020-10-15 20:01:16,223 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 20:01:16,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 20:01:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-15 20:01:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-15 20:01:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-15 20:01:16,226 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-15 20:01:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:16,226 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-15 20:01:16,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-15 20:01:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:16,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:16,227 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:16,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:16,428 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:16,428 INFO L82 PathProgramCache]: Analyzing trace with hash 950591741, now seen corresponding path program 210 times [2020-10-15 20:01:16,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:16,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466112541] [2020-10-15 20:01:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:16,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466112541] [2020-10-15 20:01:16,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476084584] [2020-10-15 20:01:16,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:16,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:01:16,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:16,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:16,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:16,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:16,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:16,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:16,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048162810] [2020-10-15 20:01:16,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:16,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:16,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:16,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:16,876 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-15 20:01:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:17,539 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-15 20:01:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:17,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:17,541 INFO L225 Difference]: With dead ends: 250 [2020-10-15 20:01:17,541 INFO L226 Difference]: Without dead ends: 248 [2020-10-15 20:01:17,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:01:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-15 20:01:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-15 20:01:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:01:17,545 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:01:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:17,545 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:01:17,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:17,545 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:01:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:17,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:17,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:17,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-15 20:01:17,747 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash 950592702, now seen corresponding path program 211 times [2020-10-15 20:01:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397210473] [2020-10-15 20:01:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:17,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397210473] [2020-10-15 20:01:17,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541905621] [2020-10-15 20:01:17,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:18,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:18,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:18,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802751924] [2020-10-15 20:01:18,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:18,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:18,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:18,289 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:01:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:19,079 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-15 20:01:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 20:01:19,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:19,082 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:19,082 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:19,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-15 20:01:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:01:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-15 20:01:19,085 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-15 20:01:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:19,086 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-15 20:01:19,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-15 20:01:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:19,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:19,086 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:19,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:19,287 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash 950621532, now seen corresponding path program 212 times [2020-10-15 20:01:19,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:19,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505869844] [2020-10-15 20:01:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:19,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505869844] [2020-10-15 20:01:19,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890605005] [2020-10-15 20:01:19,462 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 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 [2020-10-15 20:01:19,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:19,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:19,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:19,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:19,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495568230] [2020-10-15 20:01:19,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:19,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:19,960 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-15 20:01:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:21,158 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-15 20:01:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:21,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:21,162 INFO L225 Difference]: With dead ends: 262 [2020-10-15 20:01:21,162 INFO L226 Difference]: Without dead ends: 260 [2020-10-15 20:01:21,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:01:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-15 20:01:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-15 20:01:21,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:01:21,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:01:21,169 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:01:21,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:21,169 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:01:21,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:01:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:21,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:21,169 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:21,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-15 20:01:21,370 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:21,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:21,371 INFO L82 PathProgramCache]: Analyzing trace with hash 971147531, now seen corresponding path program 213 times [2020-10-15 20:01:21,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:21,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311005250] [2020-10-15 20:01:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:21,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311005250] [2020-10-15 20:01:21,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695070211] [2020-10-15 20:01:21,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:21,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:01:21,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:21,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:21,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:21,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:21,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352386384] [2020-10-15 20:01:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:21,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:21,891 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:01:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:22,909 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-15 20:01:22,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:01:22,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:22,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:22,912 INFO L225 Difference]: With dead ends: 254 [2020-10-15 20:01:22,912 INFO L226 Difference]: Without dead ends: 252 [2020-10-15 20:01:22,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:01:22,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-15 20:01:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-15 20:01:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:01:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-15 20:01:22,916 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-15 20:01:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:22,916 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-15 20:01:22,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:22,916 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-15 20:01:22,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:22,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:22,917 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:23,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-15 20:01:23,118 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 971148492, now seen corresponding path program 214 times [2020-10-15 20:01:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:23,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732403971] [2020-10-15 20:01:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:23,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732403971] [2020-10-15 20:01:23,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451892688] [2020-10-15 20:01:23,308 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 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 [2020-10-15 20:01:23,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:23,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:23,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:23,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:23,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:23,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010150790] [2020-10-15 20:01:23,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:23,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:23,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:23,770 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-15 20:01:24,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:24,740 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-15 20:01:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:24,741 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:24,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:24,742 INFO L225 Difference]: With dead ends: 248 [2020-10-15 20:01:24,742 INFO L226 Difference]: Without dead ends: 246 [2020-10-15 20:01:24,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:01:24,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-15 20:01:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-15 20:01:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:01:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:01:24,746 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:01:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:24,747 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:01:24,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:01:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:24,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:24,747 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:24,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:24,948 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 971810621, now seen corresponding path program 215 times [2020-10-15 20:01:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:24,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145013931] [2020-10-15 20:01:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145013931] [2020-10-15 20:01:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86032287] [2020-10-15 20:01:25,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:25,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:01:25,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:25,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:25,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:25,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:25,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536362137] [2020-10-15 20:01:25,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:25,439 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:01:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:26,447 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-15 20:01:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-15 20:01:26,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:26,450 INFO L225 Difference]: With dead ends: 245 [2020-10-15 20:01:26,450 INFO L226 Difference]: Without dead ends: 243 [2020-10-15 20:01:26,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:01:26,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-15 20:01:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-15 20:01:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:26,454 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:26,455 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:26,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:26,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:26,455 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:26,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:26,656 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash 971831980, now seen corresponding path program 216 times [2020-10-15 20:01:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:26,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815610759] [2020-10-15 20:01:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815610759] [2020-10-15 20:01:26,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509738328] [2020-10-15 20:01:26,814 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 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 [2020-10-15 20:01:26,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:26,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:26,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:26,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:27,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:01:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:27,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:27,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:27,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658843825] [2020-10-15 20:01:27,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:27,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:27,081 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:27,674 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-15 20:01:27,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:01:27,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:27,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:27,676 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:01:27,676 INFO L226 Difference]: Without dead ends: 218 [2020-10-15 20:01:27,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:01:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-15 20:01:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-15 20:01:27,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:27,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:27,680 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:27,680 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:27,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:27,680 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:27,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:27,680 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:27,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-15 20:01:27,881 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:27,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:27,882 INFO L82 PathProgramCache]: Analyzing trace with hash 971832941, now seen corresponding path program 217 times [2020-10-15 20:01:27,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:27,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837574982] [2020-10-15 20:01:27,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:28,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837574982] [2020-10-15 20:01:28,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193190734] [2020-10-15 20:01:28,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:28,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:28,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:28,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:01:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:28,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:28,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:28,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175620603] [2020-10-15 20:01:28,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:28,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:28,410 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:29,724 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-15 20:01:29,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:01:29,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:29,727 INFO L225 Difference]: With dead ends: 286 [2020-10-15 20:01:29,727 INFO L226 Difference]: Without dead ends: 281 [2020-10-15 20:01:29,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:01:29,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-15 20:01:29,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-15 20:01:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-15 20:01:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-15 20:01:29,731 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-15 20:01:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:29,731 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-15 20:01:29,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-15 20:01:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:29,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:29,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:29,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:29,932 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 971840412, now seen corresponding path program 218 times [2020-10-15 20:01:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:29,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285022021] [2020-10-15 20:01:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:30,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285022021] [2020-10-15 20:01:30,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223605234] [2020-10-15 20:01:30,086 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 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 [2020-10-15 20:01:30,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:30,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:30,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:30,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:30,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575656080] [2020-10-15 20:01:30,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:30,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:30,532 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-15 20:01:31,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:31,873 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-15 20:01:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-15 20:01:31,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:31,876 INFO L225 Difference]: With dead ends: 268 [2020-10-15 20:01:31,876 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 20:01:31,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-15 20:01:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 20:01:31,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-15 20:01:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:31,880 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:31,880 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:31,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:31,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:31,881 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:32,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-15 20:01:32,082 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:32,082 INFO L82 PathProgramCache]: Analyzing trace with hash 971861771, now seen corresponding path program 219 times [2020-10-15 20:01:32,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:32,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008791897] [2020-10-15 20:01:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008791897] [2020-10-15 20:01:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600424364] [2020-10-15 20:01:32,270 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 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 [2020-10-15 20:01:32,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:01:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:32,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:32,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:01:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:32,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:32,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:32,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801177100] [2020-10-15 20:01:32,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:32,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:32,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:32,691 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:34,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:34,347 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-15 20:01:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:01:34,349 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:34,350 INFO L225 Difference]: With dead ends: 296 [2020-10-15 20:01:34,351 INFO L226 Difference]: Without dead ends: 291 [2020-10-15 20:01:34,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:01:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-15 20:01:34,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-15 20:01:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-15 20:01:34,354 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-15 20:01:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:34,354 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-15 20:01:34,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-15 20:01:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:34,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:34,355 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:34,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:34,556 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash 971862732, now seen corresponding path program 220 times [2020-10-15 20:01:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:34,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120762916] [2020-10-15 20:01:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120762916] [2020-10-15 20:01:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475780808] [2020-10-15 20:01:34,732 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 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 [2020-10-15 20:01:34,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:01:34,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:34,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:34,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:35,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:01:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:35,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:35,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:35,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769145305] [2020-10-15 20:01:35,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:35,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:35,093 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-15 20:01:36,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:36,622 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-15 20:01:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:01:36,624 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:36,625 INFO L225 Difference]: With dead ends: 299 [2020-10-15 20:01:36,625 INFO L226 Difference]: Without dead ends: 294 [2020-10-15 20:01:36,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-15 20:01:36,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-15 20:01:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-15 20:01:36,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-15 20:01:36,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-15 20:01:36,630 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-15 20:01:36,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:36,630 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-15 20:01:36,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:36,630 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-15 20:01:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:36,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:36,630 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:36,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:36,831 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 972071052, now seen corresponding path program 221 times [2020-10-15 20:01:36,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:36,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368909923] [2020-10-15 20:01:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368909923] [2020-10-15 20:01:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624270063] [2020-10-15 20:01:36,999 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 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 [2020-10-15 20:01:37,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:01:37,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:37,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:37,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:37,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:37,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608990320] [2020-10-15 20:01:37,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:37,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:37,440 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-15 20:01:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:38,891 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-15 20:01:38,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:01:38,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:38,894 INFO L225 Difference]: With dead ends: 274 [2020-10-15 20:01:38,894 INFO L226 Difference]: Without dead ends: 272 [2020-10-15 20:01:38,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-15 20:01:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-15 20:01:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-15 20:01:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-15 20:01:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-15 20:01:38,899 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-15 20:01:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:38,899 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-15 20:01:38,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-15 20:01:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:38,900 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:39,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:01:39,110 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash 972734142, now seen corresponding path program 222 times [2020-10-15 20:01:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712480629] [2020-10-15 20:01:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:39,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:39,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712480629] [2020-10-15 20:01:39,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331313617] [2020-10-15 20:01:39,295 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 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 [2020-10-15 20:01:39,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:01:39,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:39,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:39,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:39,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:39,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896026886] [2020-10-15 20:01:39,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:39,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:39,737 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-15 20:01:41,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:41,466 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-15 20:01:41,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 20:01:41,470 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:41,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:41,470 INFO L225 Difference]: With dead ends: 282 [2020-10-15 20:01:41,470 INFO L226 Difference]: Without dead ends: 280 [2020-10-15 20:01:41,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:01:41,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-15 20:01:41,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-15 20:01:41,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-15 20:01:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-15 20:01:41,475 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-15 20:01:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:41,475 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-15 20:01:41,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-15 20:01:41,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:41,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:41,476 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:41,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-15 20:01:41,682 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:41,683 INFO L82 PathProgramCache]: Analyzing trace with hash 972755501, now seen corresponding path program 223 times [2020-10-15 20:01:41,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:41,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890272630] [2020-10-15 20:01:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:41,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890272630] [2020-10-15 20:01:41,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566851467] [2020-10-15 20:01:41,868 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 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 [2020-10-15 20:01:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:41,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:41,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:42,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:01:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:42,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:42,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:42,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689917486] [2020-10-15 20:01:42,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:42,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:42,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:42,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:01:42,272 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-15 20:01:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:01:44,513 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-15 20:01:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:01:44,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:01:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:01:44,517 INFO L225 Difference]: With dead ends: 321 [2020-10-15 20:01:44,522 INFO L226 Difference]: Without dead ends: 313 [2020-10-15 20:01:44,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-15 20:01:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-15 20:01:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-15 20:01:44,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-15 20:01:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-15 20:01:44,526 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-15 20:01:44,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:01:44,526 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-15 20:01:44,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:01:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-15 20:01:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:01:44,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:01:44,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:01:44,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-15 20:01:44,729 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:01:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:01:44,730 INFO L82 PathProgramCache]: Analyzing trace with hash 972756462, now seen corresponding path program 224 times [2020-10-15 20:01:44,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:01:44,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840492833] [2020-10-15 20:01:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:01:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:01:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:44,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840492833] [2020-10-15 20:01:44,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172514062] [2020-10-15 20:01:44,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:01:44,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:01:44,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:01:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:01:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:01:49,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:01:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:01:49,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:01:49,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:01:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8730682] [2020-10-15 20:01:49,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:01:49,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:01:49,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:01:49,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-15 20:01:49,450 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-15 20:01:54,263 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-15 20:01:58,459 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-15 20:02:02,804 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-15 20:02:07,200 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-15 20:02:09,314 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-15 20:02:14,066 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-15 20:02:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:15,046 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-15 20:02:15,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:02:15,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:15,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:15,049 INFO L225 Difference]: With dead ends: 323 [2020-10-15 20:02:15,049 INFO L226 Difference]: Without dead ends: 315 [2020-10-15 20:02:15,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-15 20:02:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-15 20:02:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-15 20:02:15,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-15 20:02:15,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-15 20:02:15,053 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-15 20:02:15,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:15,053 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-15 20:02:15,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-15 20:02:15,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:15,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:15,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:15,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-15 20:02:15,255 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:15,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:15,255 INFO L82 PathProgramCache]: Analyzing trace with hash 972785292, now seen corresponding path program 225 times [2020-10-15 20:02:15,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:15,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892416582] [2020-10-15 20:02:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:15,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892416582] [2020-10-15 20:02:15,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394229330] [2020-10-15 20:02:15,436 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 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 [2020-10-15 20:02:15,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:02:15,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:15,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:15,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:15,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:15,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:15,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:15,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:15,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64715045] [2020-10-15 20:02:15,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:15,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:15,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:15,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:15,906 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-15 20:02:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:18,522 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-10-15 20:02:18,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:02:18,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:18,526 INFO L225 Difference]: With dead ends: 320 [2020-10-15 20:02:18,526 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 20:02:18,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-15 20:02:18,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 20:02:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-10-15 20:02:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-15 20:02:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-10-15 20:02:18,531 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-10-15 20:02:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:18,531 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-10-15 20:02:18,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-10-15 20:02:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:18,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:18,532 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:18,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-15 20:02:18,735 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash 979221853, now seen corresponding path program 226 times [2020-10-15 20:02:18,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:18,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168207410] [2020-10-15 20:02:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168207410] [2020-10-15 20:02:18,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424243160] [2020-10-15 20:02:18,925 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 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 [2020-10-15 20:02:18,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:02:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:18,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:19,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:19,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:19,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296728473] [2020-10-15 20:02:19,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:19,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:19,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:19,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:19,320 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-10-15 20:02:20,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:20,316 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-10-15 20:02:20,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-15 20:02:20,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:20,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:20,320 INFO L225 Difference]: With dead ends: 256 [2020-10-15 20:02:20,320 INFO L226 Difference]: Without dead ends: 254 [2020-10-15 20:02:20,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:02:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-15 20:02:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-10-15 20:02:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-15 20:02:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-10-15 20:02:20,324 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-10-15 20:02:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:20,324 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-10-15 20:02:20,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-10-15 20:02:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:20,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:20,324 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:20,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-10-15 20:02:20,525 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:20,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash 999776682, now seen corresponding path program 227 times [2020-10-15 20:02:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:20,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146570341] [2020-10-15 20:02:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:20,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146570341] [2020-10-15 20:02:20,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927427620] [2020-10-15 20:02:20,713 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 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 [2020-10-15 20:02:20,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:02:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:21,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:21,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:21,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112278181] [2020-10-15 20:02:21,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:21,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:21,084 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-10-15 20:02:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:22,598 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-10-15 20:02:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:02:22,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:22,602 INFO L225 Difference]: With dead ends: 294 [2020-10-15 20:02:22,602 INFO L226 Difference]: Without dead ends: 292 [2020-10-15 20:02:22,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-10-15 20:02:22,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-15 20:02:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-10-15 20:02:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:02:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-10-15 20:02:22,607 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-10-15 20:02:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:22,607 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-10-15 20:02:22,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-10-15 20:02:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:22,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:22,607 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:22,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:22,808 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:22,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:22,809 INFO L82 PathProgramCache]: Analyzing trace with hash 999777643, now seen corresponding path program 228 times [2020-10-15 20:02:22,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:22,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456126448] [2020-10-15 20:02:22,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456126448] [2020-10-15 20:02:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848720693] [2020-10-15 20:02:22,955 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 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 [2020-10-15 20:02:22,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:02:22,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:22,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:22,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:23,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:23,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:23,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304555578] [2020-10-15 20:02:23,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:23,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:23,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:23,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:23,352 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-10-15 20:02:24,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:24,631 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-10-15 20:02:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-15 20:02:24,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:24,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:24,634 INFO L225 Difference]: With dead ends: 266 [2020-10-15 20:02:24,634 INFO L226 Difference]: Without dead ends: 264 [2020-10-15 20:02:24,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-10-15 20:02:24,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-15 20:02:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-10-15 20:02:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:02:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 20:02:24,637 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 20:02:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:24,637 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 20:02:24,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 20:02:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:24,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:24,638 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:24,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:24,838 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:24,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1000439772, now seen corresponding path program 229 times [2020-10-15 20:02:24,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:24,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595507357] [2020-10-15 20:02:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:25,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595507357] [2020-10-15 20:02:25,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697148924] [2020-10-15 20:02:25,029 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 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 [2020-10-15 20:02:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:25,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:25,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:25,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363178287] [2020-10-15 20:02:25,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:25,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:25,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:25,375 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 20:02:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:27,276 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-10-15 20:02:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:02:27,279 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:27,280 INFO L225 Difference]: With dead ends: 275 [2020-10-15 20:02:27,280 INFO L226 Difference]: Without dead ends: 273 [2020-10-15 20:02:27,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:02:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-15 20:02:27,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-10-15 20:02:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:02:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:02:27,285 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:02:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:27,285 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:02:27,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:02:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:27,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:27,286 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:27,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:27,487 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:27,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:27,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1000461131, now seen corresponding path program 230 times [2020-10-15 20:02:27,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:27,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921517608] [2020-10-15 20:02:27,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921517608] [2020-10-15 20:02:27,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170562521] [2020-10-15 20:02:27,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:02:27,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:02:27,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:27,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:27,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:28,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:28,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:28,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47137001] [2020-10-15 20:02:28,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:28,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:28,131 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:02:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:29,989 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-10-15 20:02:29,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-15 20:02:29,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:29,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:29,993 INFO L225 Difference]: With dead ends: 285 [2020-10-15 20:02:29,993 INFO L226 Difference]: Without dead ends: 277 [2020-10-15 20:02:29,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-10-15 20:02:29,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-15 20:02:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-10-15 20:02:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:02:29,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:02:29,997 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:02:29,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:29,997 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:02:29,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:02:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:29,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:29,998 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:30,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-10-15 20:02:30,200 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:30,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1000462092, now seen corresponding path program 231 times [2020-10-15 20:02:30,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:30,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119856407] [2020-10-15 20:02:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:30,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:30,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119856407] [2020-10-15 20:02:30,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252886713] [2020-10-15 20:02:30,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:02:30,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:02:30,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:30,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:30,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:30,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:30,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:30,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:30,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492954629] [2020-10-15 20:02:30,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:30,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:30,948 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:02:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:33,202 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-10-15 20:02:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:02:33,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:33,204 INFO L225 Difference]: With dead ends: 307 [2020-10-15 20:02:33,204 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 20:02:33,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:02:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 20:02:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-10-15 20:02:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:02:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-10-15 20:02:33,209 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-10-15 20:02:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:33,209 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-10-15 20:02:33,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-10-15 20:02:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:33,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:33,209 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:33,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:33,412 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:33,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1000469563, now seen corresponding path program 232 times [2020-10-15 20:02:33,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:33,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923848814] [2020-10-15 20:02:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:33,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923848814] [2020-10-15 20:02:33,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629130847] [2020-10-15 20:02:33,623 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 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 [2020-10-15 20:02:33,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:02:33,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:33,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:33,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:33,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:33,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:33,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134827575] [2020-10-15 20:02:33,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:33,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:33,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:33,973 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-10-15 20:02:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:35,314 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-10-15 20:02:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-15 20:02:35,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:35,317 INFO L225 Difference]: With dead ends: 280 [2020-10-15 20:02:35,318 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 20:02:35,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-10-15 20:02:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 20:02:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-10-15 20:02:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-15 20:02:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-10-15 20:02:35,321 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-10-15 20:02:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:35,321 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-10-15 20:02:35,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-10-15 20:02:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:35,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:35,322 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:35,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-10-15 20:02:35,523 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1000490922, now seen corresponding path program 233 times [2020-10-15 20:02:35,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:35,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594380089] [2020-10-15 20:02:35,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594380089] [2020-10-15 20:02:35,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244618903] [2020-10-15 20:02:35,741 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 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 [2020-10-15 20:02:35,781 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:02:35,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:35,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:35,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:36,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:36,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:36,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:36,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925933372] [2020-10-15 20:02:36,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:36,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:36,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:36,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:36,099 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-10-15 20:02:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:37,684 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-10-15 20:02:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-15 20:02:37,687 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:37,688 INFO L225 Difference]: With dead ends: 315 [2020-10-15 20:02:37,688 INFO L226 Difference]: Without dead ends: 307 [2020-10-15 20:02:37,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-15 20:02:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-10-15 20:02:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-10-15 20:02:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-15 20:02:37,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-10-15 20:02:37,692 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-10-15 20:02:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:37,692 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-10-15 20:02:37,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-10-15 20:02:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:37,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:37,693 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:37,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:37,893 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1000491883, now seen corresponding path program 234 times [2020-10-15 20:02:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:37,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542444080] [2020-10-15 20:02:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542444080] [2020-10-15 20:02:38,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992783102] [2020-10-15 20:02:38,115 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 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 [2020-10-15 20:02:38,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:02:38,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:38,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:38,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:38,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:38,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:38,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245450969] [2020-10-15 20:02:38,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:38,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:38,473 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-10-15 20:02:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:40,371 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-10-15 20:02:40,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:02:40,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:40,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:40,374 INFO L225 Difference]: With dead ends: 312 [2020-10-15 20:02:40,374 INFO L226 Difference]: Without dead ends: 304 [2020-10-15 20:02:40,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:02:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-15 20:02:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-10-15 20:02:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-15 20:02:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-10-15 20:02:40,378 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-10-15 20:02:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:40,378 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-10-15 20:02:40,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-10-15 20:02:40,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:40,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:40,379 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:40,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-15 20:02:40,579 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:40,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1001384652, now seen corresponding path program 235 times [2020-10-15 20:02:40,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:40,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000331354] [2020-10-15 20:02:40,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:40,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000331354] [2020-10-15 20:02:40,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198964252] [2020-10-15 20:02:40,785 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 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 [2020-10-15 20:02:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:41,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:02:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:41,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:41,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:41,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879799189] [2020-10-15 20:02:41,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:41,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:41,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:41,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:41,129 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-10-15 20:02:43,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:43,253 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-10-15 20:02:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-15 20:02:43,256 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:43,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:43,257 INFO L225 Difference]: With dead ends: 307 [2020-10-15 20:02:43,257 INFO L226 Difference]: Without dead ends: 299 [2020-10-15 20:02:43,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 20:02:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-15 20:02:43,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-10-15 20:02:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-15 20:02:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-10-15 20:02:43,260 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-10-15 20:02:43,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:43,260 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-10-15 20:02:43,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-10-15 20:02:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:43,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:43,261 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:43,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:43,462 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:43,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:43,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1866754364, now seen corresponding path program 236 times [2020-10-15 20:02:43,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:43,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282216511] [2020-10-15 20:02:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:43,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:43,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282216511] [2020-10-15 20:02:43,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141496444] [2020-10-15 20:02:43,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:02:43,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:02:43,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:43,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:43,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:44,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:44,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:44,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202145141] [2020-10-15 20:02:44,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:44,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:44,130 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-10-15 20:02:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:44,932 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-10-15 20:02:44,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:02:44,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:44,935 INFO L225 Difference]: With dead ends: 225 [2020-10-15 20:02:44,935 INFO L226 Difference]: Without dead ends: 223 [2020-10-15 20:02:44,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:02:44,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-15 20:02:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-10-15 20:02:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-15 20:02:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-10-15 20:02:44,938 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-10-15 20:02:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:44,939 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-10-15 20:02:44,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-10-15 20:02:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:44,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:44,939 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:45,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-15 20:02:45,140 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1888203884, now seen corresponding path program 237 times [2020-10-15 20:02:45,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:45,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660551272] [2020-10-15 20:02:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:45,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660551272] [2020-10-15 20:02:45,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980861573] [2020-10-15 20:02:45,436 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 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 [2020-10-15 20:02:45,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:02:45,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:45,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:45,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:45,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:45,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532588178] [2020-10-15 20:02:45,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:45,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:45,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:45,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:45,916 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-10-15 20:02:46,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:46,787 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-10-15 20:02:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:02:46,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:46,791 INFO L225 Difference]: With dead ends: 223 [2020-10-15 20:02:46,791 INFO L226 Difference]: Without dead ends: 221 [2020-10-15 20:02:46,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:02:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-15 20:02:46,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-10-15 20:02:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 20:02:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-10-15 20:02:46,796 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-10-15 20:02:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:46,796 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-10-15 20:02:46,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-10-15 20:02:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:46,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:46,796 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:46,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-10-15 20:02:46,997 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:46,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1888866974, now seen corresponding path program 238 times [2020-10-15 20:02:46,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:46,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843984736] [2020-10-15 20:02:46,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843984736] [2020-10-15 20:02:47,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783947322] [2020-10-15 20:02:47,233 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 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 [2020-10-15 20:02:47,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:02:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:47,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:47,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:47,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:47,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:02:47,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600312362] [2020-10-15 20:02:47,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:02:47,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:02:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:02:47,791 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-10-15 20:02:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:02:48,728 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-10-15 20:02:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:02:48,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:02:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:02:48,733 INFO L225 Difference]: With dead ends: 221 [2020-10-15 20:02:48,733 INFO L226 Difference]: Without dead ends: 219 [2020-10-15 20:02:48,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:02:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-15 20:02:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-10-15 20:02:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-15 20:02:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-10-15 20:02:48,736 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-10-15 20:02:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:02:48,736 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-10-15 20:02:48,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:02:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-10-15 20:02:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:02:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:02:48,736 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:02:48,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:02:48,937 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:02:48,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:02:48,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1888889294, now seen corresponding path program 239 times [2020-10-15 20:02:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:02:48,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056197247] [2020-10-15 20:02:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:02:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:02:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:49,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056197247] [2020-10-15 20:02:49,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633446092] [2020-10-15 20:02:49,159 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 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 [2020-10-15 20:02:49,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:02:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:02:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:02:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:02:49,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-15 20:02:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:02:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:02:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-15 20:02:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903813008] [2020-10-15 20:02:51,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 20:02:51,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:02:51,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 20:02:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-10-15 20:02:51,720 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-10-15 20:03:13,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:13,717 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-10-15 20:03:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-15 20:03:13,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-15 20:03:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:13,727 INFO L225 Difference]: With dead ends: 252 [2020-10-15 20:03:13,727 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 20:03:13,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-10-15 20:03:13,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 20:03:13,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-10-15 20:03:13,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-15 20:03:13,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-10-15 20:03:13,730 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-10-15 20:03:13,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:13,730 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-10-15 20:03:13,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 20:03:13,730 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-10-15 20:03:13,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:13,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:13,731 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:13,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:13,931 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:13,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:13,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1888918124, now seen corresponding path program 240 times [2020-10-15 20:03:13,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:13,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071907145] [2020-10-15 20:03:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:14,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071907145] [2020-10-15 20:03:14,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803415071] [2020-10-15 20:03:14,190 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 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 [2020-10-15 20:03:14,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:14,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:14,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-15 20:03:14,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:14,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-15 20:03:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:14,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:14,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-15 20:03:14,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057360643] [2020-10-15 20:03:14,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 20:03:14,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:14,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 20:03:14,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-15 20:03:14,686 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-10-15 20:03:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:15,959 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-10-15 20:03:15,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:03:15,963 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-15 20:03:15,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:15,964 INFO L225 Difference]: With dead ends: 225 [2020-10-15 20:03:15,964 INFO L226 Difference]: Without dead ends: 220 [2020-10-15 20:03:15,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:03:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-15 20:03:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-10-15 20:03:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-15 20:03:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-10-15 20:03:15,967 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-10-15 20:03:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:15,967 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-10-15 20:03:15,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 20:03:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-10-15 20:03:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:15,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:15,968 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:16,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:16,169 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:16,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1949255125, now seen corresponding path program 7 times [2020-10-15 20:03:16,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:16,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963891204] [2020-10-15 20:03:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:16,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963891204] [2020-10-15 20:03:16,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406078650] [2020-10-15 20:03:16,496 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 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 [2020-10-15 20:03:16,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:16,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:03:16,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:16,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:03:16,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 20:03:16,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451714564] [2020-10-15 20:03:16,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:03:16,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:16,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:03:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:16,866 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 9 states. [2020-10-15 20:03:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:16,950 INFO L93 Difference]: Finished difference Result 235 states and 626 transitions. [2020-10-15 20:03:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:03:16,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 20:03:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:16,954 INFO L225 Difference]: With dead ends: 235 [2020-10-15 20:03:16,954 INFO L226 Difference]: Without dead ends: 227 [2020-10-15 20:03:16,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-15 20:03:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-10-15 20:03:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-15 20:03:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 611 transitions. [2020-10-15 20:03:16,959 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 611 transitions. Word has length 14 [2020-10-15 20:03:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:16,959 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 611 transitions. [2020-10-15 20:03:16,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:03:16,959 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 611 transitions. [2020-10-15 20:03:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-15 20:03:16,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:16,960 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:17,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:17,161 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 163688120, now seen corresponding path program 28 times [2020-10-15 20:03:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:17,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699031272] [2020-10-15 20:03:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:17,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699031272] [2020-10-15 20:03:17,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588200440] [2020-10-15 20:03:17,690 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 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 [2020-10-15 20:03:17,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:17,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-15 20:03:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:18,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-15 20:03:18,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 18 [2020-10-15 20:03:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76024244] [2020-10-15 20:03:18,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 20:03:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 20:03:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:18,083 INFO L87 Difference]: Start difference. First operand 227 states and 611 transitions. Second operand 9 states. [2020-10-15 20:03:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:18,177 INFO L93 Difference]: Finished difference Result 338 states and 895 transitions. [2020-10-15 20:03:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 20:03:18,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-10-15 20:03:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:18,182 INFO L225 Difference]: With dead ends: 338 [2020-10-15 20:03:18,182 INFO L226 Difference]: Without dead ends: 312 [2020-10-15 20:03:18,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-15 20:03:18,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-15 20:03:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-15 20:03:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-15 20:03:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 836 transitions. [2020-10-15 20:03:18,196 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 836 transitions. Word has length 14 [2020-10-15 20:03:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:18,196 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 836 transitions. [2020-10-15 20:03:18,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 20:03:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 836 transitions. [2020-10-15 20:03:18,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:18,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:18,197 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:18,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-10-15 20:03:18,411 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash 491277249, now seen corresponding path program 241 times [2020-10-15 20:03:18,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:18,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033870938] [2020-10-15 20:03:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033870938] [2020-10-15 20:03:18,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794251448] [2020-10-15 20:03:18,792 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 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 [2020-10-15 20:03:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:19,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:19,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:19,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429554786] [2020-10-15 20:03:19,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:19,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:19,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:19,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:19,405 INFO L87 Difference]: Start difference. First operand 312 states and 836 transitions. Second operand 19 states. [2020-10-15 20:03:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:19,561 INFO L93 Difference]: Finished difference Result 353 states and 914 transitions. [2020-10-15 20:03:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 20:03:19,564 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:19,565 INFO L225 Difference]: With dead ends: 353 [2020-10-15 20:03:19,565 INFO L226 Difference]: Without dead ends: 351 [2020-10-15 20:03:19,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-10-15 20:03:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 324. [2020-10-15 20:03:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-15 20:03:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2020-10-15 20:03:19,572 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 15 [2020-10-15 20:03:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:19,572 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2020-10-15 20:03:19,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:19,573 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2020-10-15 20:03:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:19,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:19,573 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:19,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:19,775 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:19,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:19,775 INFO L82 PathProgramCache]: Analyzing trace with hash 491278210, now seen corresponding path program 242 times [2020-10-15 20:03:19,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:19,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231327105] [2020-10-15 20:03:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231327105] [2020-10-15 20:03:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168440295] [2020-10-15 20:03:20,155 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 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 [2020-10-15 20:03:20,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:20,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:20,804 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:20,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:20,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:20,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209170744] [2020-10-15 20:03:20,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:20,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:20,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:20,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:20,805 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand 19 states. [2020-10-15 20:03:21,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:21,591 INFO L93 Difference]: Finished difference Result 377 states and 965 transitions. [2020-10-15 20:03:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:03:21,595 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:21,597 INFO L225 Difference]: With dead ends: 377 [2020-10-15 20:03:21,597 INFO L226 Difference]: Without dead ends: 374 [2020-10-15 20:03:21,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-10-15 20:03:21,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-15 20:03:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 325. [2020-10-15 20:03:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-15 20:03:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 873 transitions. [2020-10-15 20:03:21,602 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 873 transitions. Word has length 15 [2020-10-15 20:03:21,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:21,602 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 873 transitions. [2020-10-15 20:03:21,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:21,602 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 873 transitions. [2020-10-15 20:03:21,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:21,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:21,603 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:21,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-15 20:03:21,804 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash 491307040, now seen corresponding path program 243 times [2020-10-15 20:03:21,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:21,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500513186] [2020-10-15 20:03:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500513186] [2020-10-15 20:03:22,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264698925] [2020-10-15 20:03:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:03:22,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:22,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:22,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:22,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:23,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:23,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:23,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548615796] [2020-10-15 20:03:23,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:23,361 INFO L87 Difference]: Start difference. First operand 325 states and 873 transitions. Second operand 19 states. [2020-10-15 20:03:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:24,173 INFO L93 Difference]: Finished difference Result 408 states and 1035 transitions. [2020-10-15 20:03:24,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:03:24,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:24,178 INFO L225 Difference]: With dead ends: 408 [2020-10-15 20:03:24,178 INFO L226 Difference]: Without dead ends: 404 [2020-10-15 20:03:24,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:03:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-15 20:03:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 327. [2020-10-15 20:03:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-15 20:03:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 879 transitions. [2020-10-15 20:03:24,184 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 879 transitions. Word has length 15 [2020-10-15 20:03:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:24,184 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 879 transitions. [2020-10-15 20:03:24,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 879 transitions. [2020-10-15 20:03:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:24,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:24,185 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:24,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:24,386 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 492200770, now seen corresponding path program 244 times [2020-10-15 20:03:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:24,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950675204] [2020-10-15 20:03:24,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950675204] [2020-10-15 20:03:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179255864] [2020-10-15 20:03:24,748 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 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 [2020-10-15 20:03:24,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:03:24,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:24,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:24,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:29,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:29,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:29,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613450161] [2020-10-15 20:03:29,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:29,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:29,260 INFO L87 Difference]: Start difference. First operand 327 states and 879 transitions. Second operand 19 states. [2020-10-15 20:03:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:30,383 INFO L93 Difference]: Finished difference Result 406 states and 1027 transitions. [2020-10-15 20:03:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 20:03:30,386 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:30,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:30,387 INFO L225 Difference]: With dead ends: 406 [2020-10-15 20:03:30,387 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 20:03:30,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 20:03:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 329. [2020-10-15 20:03:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-10-15 20:03:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 885 transitions. [2020-10-15 20:03:30,395 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 885 transitions. Word has length 15 [2020-10-15 20:03:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:30,395 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 885 transitions. [2020-10-15 20:03:30,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 885 transitions. [2020-10-15 20:03:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:30,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:30,396 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:30,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-15 20:03:30,608 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 492201731, now seen corresponding path program 245 times [2020-10-15 20:03:30,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:30,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93101426] [2020-10-15 20:03:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:30,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93101426] [2020-10-15 20:03:30,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075790761] [2020-10-15 20:03:30,872 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 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 [2020-10-15 20:03:30,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:03:30,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:35,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:35,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:35,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920755388] [2020-10-15 20:03:35,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:35,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:35,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:35,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-10-15 20:03:35,588 INFO L87 Difference]: Start difference. First operand 329 states and 885 transitions. Second operand 19 states. [2020-10-15 20:03:40,006 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:03:40,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:40,746 INFO L93 Difference]: Finished difference Result 437 states and 1102 transitions. [2020-10-15 20:03:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:03:40,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:40,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:40,748 INFO L225 Difference]: With dead ends: 437 [2020-10-15 20:03:40,748 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 20:03:40,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-10-15 20:03:40,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 20:03:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 330. [2020-10-15 20:03:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 20:03:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 20:03:40,754 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 20:03:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:40,754 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 20:03:40,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:40,754 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 20:03:40,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:40,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:40,755 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:40,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:40,955 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash 492230561, now seen corresponding path program 246 times [2020-10-15 20:03:40,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:40,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623464787] [2020-10-15 20:03:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623464787] [2020-10-15 20:03:41,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062125826] [2020-10-15 20:03:41,261 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 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 [2020-10-15 20:03:41,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:03:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:41,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:41,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152649703] [2020-10-15 20:03:41,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:41,959 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 20:03:42,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:42,928 INFO L93 Difference]: Finished difference Result 427 states and 1079 transitions. [2020-10-15 20:03:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:03:42,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:42,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:42,932 INFO L225 Difference]: With dead ends: 427 [2020-10-15 20:03:42,932 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 20:03:42,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:03:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 20:03:42,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 330. [2020-10-15 20:03:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-15 20:03:42,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2020-10-15 20:03:42,937 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 15 [2020-10-15 20:03:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:42,937 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2020-10-15 20:03:42,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2020-10-15 20:03:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:42,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:42,938 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:43,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:43,139 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:43,139 INFO L82 PathProgramCache]: Analyzing trace with hash 519906400, now seen corresponding path program 247 times [2020-10-15 20:03:43,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:43,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497598572] [2020-10-15 20:03:43,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497598572] [2020-10-15 20:03:43,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725456342] [2020-10-15 20:03:43,439 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 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 [2020-10-15 20:03:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:43,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:44,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:44,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:44,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325313197] [2020-10-15 20:03:44,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:44,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:44,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:44,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:44,054 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand 19 states. [2020-10-15 20:03:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:45,392 INFO L93 Difference]: Finished difference Result 411 states and 1040 transitions. [2020-10-15 20:03:45,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:03:45,395 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:45,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:45,397 INFO L225 Difference]: With dead ends: 411 [2020-10-15 20:03:45,397 INFO L226 Difference]: Without dead ends: 408 [2020-10-15 20:03:45,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:03:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-15 20:03:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 333. [2020-10-15 20:03:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 20:03:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 20:03:45,402 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 20:03:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:45,402 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 20:03:45,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 20:03:45,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:45,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:45,403 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:45,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-10-15 20:03:45,603 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash 519907361, now seen corresponding path program 248 times [2020-10-15 20:03:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:45,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141711748] [2020-10-15 20:03:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:45,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141711748] [2020-10-15 20:03:45,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633112758] [2020-10-15 20:03:45,892 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 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 [2020-10-15 20:03:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:03:45,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:45,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:03:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:46,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:03:46,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:03:46,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217721760] [2020-10-15 20:03:46,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:03:46,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:03:46,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:03:46,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:03:46,582 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 20:03:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:03:47,708 INFO L93 Difference]: Finished difference Result 441 states and 1112 transitions. [2020-10-15 20:03:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:03:47,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:03:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:03:47,711 INFO L225 Difference]: With dead ends: 441 [2020-10-15 20:03:47,711 INFO L226 Difference]: Without dead ends: 436 [2020-10-15 20:03:47,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:03:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-15 20:03:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-15 20:03:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-15 20:03:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 897 transitions. [2020-10-15 20:03:47,715 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 897 transitions. Word has length 15 [2020-10-15 20:03:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:03:47,716 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 897 transitions. [2020-10-15 20:03:47,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:03:47,716 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 897 transitions. [2020-10-15 20:03:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:03:47,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:03:47,716 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:03:47,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:03:47,917 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:03:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:03:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 519936191, now seen corresponding path program 249 times [2020-10-15 20:03:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:03:47,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96829766] [2020-10-15 20:03:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:03:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:03:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:03:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96829766] [2020-10-15 20:03:48,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746592716] [2020-10-15 20:03:48,257 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 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 [2020-10-15 20:03:48,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:03:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:03:48,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:03:48,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:06,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:06,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:06,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:06,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961242733] [2020-10-15 20:04:06,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:06,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:06,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:06,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=234, Unknown=3, NotChecked=0, Total=342 [2020-10-15 20:04:06,687 INFO L87 Difference]: Start difference. First operand 333 states and 897 transitions. Second operand 19 states. [2020-10-15 20:04:11,110 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-15 20:04:19,833 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-15 20:04:24,054 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-15 20:04:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:34,512 INFO L93 Difference]: Finished difference Result 455 states and 1144 transitions. [2020-10-15 20:04:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:04:34,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:34,517 INFO L225 Difference]: With dead ends: 455 [2020-10-15 20:04:34,517 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 20:04:34,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=253, Invalid=496, Unknown=7, NotChecked=0, Total=756 [2020-10-15 20:04:34,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 20:04:34,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 334. [2020-10-15 20:04:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 20:04:34,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 20:04:34,522 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 20:04:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:34,523 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 20:04:34,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 20:04:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:34,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:34,523 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:34,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:34,724 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 520830882, now seen corresponding path program 250 times [2020-10-15 20:04:34,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:34,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333828037] [2020-10-15 20:04:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333828037] [2020-10-15 20:04:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353014037] [2020-10-15 20:04:35,068 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 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 [2020-10-15 20:04:35,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:35,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:35,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:35,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:37,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:37,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:37,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476959553] [2020-10-15 20:04:37,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:37,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:37,185 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 20:04:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:38,530 INFO L93 Difference]: Finished difference Result 464 states and 1169 transitions. [2020-10-15 20:04:38,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:04:38,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:38,535 INFO L225 Difference]: With dead ends: 464 [2020-10-15 20:04:38,536 INFO L226 Difference]: Without dead ends: 458 [2020-10-15 20:04:38,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:04:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-15 20:04:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 334. [2020-10-15 20:04:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-10-15 20:04:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2020-10-15 20:04:38,541 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 15 [2020-10-15 20:04:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:38,541 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2020-10-15 20:04:38,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2020-10-15 20:04:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:38,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:38,541 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:38,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:38,742 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1378780930, now seen corresponding path program 251 times [2020-10-15 20:04:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:38,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256664122] [2020-10-15 20:04:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256664122] [2020-10-15 20:04:38,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427189215] [2020-10-15 20:04:38,984 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 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 [2020-10-15 20:04:39,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:39,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:39,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:39,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:39,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41827790] [2020-10-15 20:04:39,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:39,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:39,574 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand 19 states. [2020-10-15 20:04:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:40,793 INFO L93 Difference]: Finished difference Result 414 states and 1047 transitions. [2020-10-15 20:04:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:04:40,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:40,797 INFO L225 Difference]: With dead ends: 414 [2020-10-15 20:04:40,797 INFO L226 Difference]: Without dead ends: 411 [2020-10-15 20:04:40,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:04:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-15 20:04:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 338. [2020-10-15 20:04:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 20:04:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 20:04:40,803 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 20:04:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:40,803 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 20:04:40,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 20:04:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:40,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:40,804 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:41,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:41,005 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1378781891, now seen corresponding path program 252 times [2020-10-15 20:04:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123825545] [2020-10-15 20:04:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:41,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123825545] [2020-10-15 20:04:41,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858570886] [2020-10-15 20:04:41,321 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 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 [2020-10-15 20:04:41,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:04:41,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:41,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:41,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:41,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:41,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:41,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870762309] [2020-10-15 20:04:41,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:41,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:41,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:41,919 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 20:04:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:43,050 INFO L93 Difference]: Finished difference Result 441 states and 1109 transitions. [2020-10-15 20:04:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:04:43,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:43,054 INFO L225 Difference]: With dead ends: 441 [2020-10-15 20:04:43,054 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 20:04:43,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:04:43,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 20:04:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 337. [2020-10-15 20:04:43,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-15 20:04:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 909 transitions. [2020-10-15 20:04:43,070 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 909 transitions. Word has length 15 [2020-10-15 20:04:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:43,070 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 909 transitions. [2020-10-15 20:04:43,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 909 transitions. [2020-10-15 20:04:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:43,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:43,071 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:43,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-15 20:04:43,271 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1378810721, now seen corresponding path program 253 times [2020-10-15 20:04:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:43,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478814666] [2020-10-15 20:04:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:43,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478814666] [2020-10-15 20:04:43,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120972793] [2020-10-15 20:04:43,596 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 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 [2020-10-15 20:04:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:43,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:44,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:44,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:44,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202826213] [2020-10-15 20:04:44,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:44,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:44,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:44,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:44,490 INFO L87 Difference]: Start difference. First operand 337 states and 909 transitions. Second operand 19 states. [2020-10-15 20:04:45,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:45,520 INFO L93 Difference]: Finished difference Result 454 states and 1141 transitions. [2020-10-15 20:04:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:04:45,524 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:45,525 INFO L225 Difference]: With dead ends: 454 [2020-10-15 20:04:45,525 INFO L226 Difference]: Without dead ends: 449 [2020-10-15 20:04:45,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:04:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-15 20:04:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 336. [2020-10-15 20:04:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-15 20:04:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 906 transitions. [2020-10-15 20:04:45,531 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 906 transitions. Word has length 15 [2020-10-15 20:04:45,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:45,531 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 906 transitions. [2020-10-15 20:04:45,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 906 transitions. [2020-10-15 20:04:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:45,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:45,532 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:45,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-15 20:04:45,733 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1379704451, now seen corresponding path program 254 times [2020-10-15 20:04:45,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:45,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37729338] [2020-10-15 20:04:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:46,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37729338] [2020-10-15 20:04:46,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893964895] [2020-10-15 20:04:46,060 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 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 [2020-10-15 20:04:46,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:04:46,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:46,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:46,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:46,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:46,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:46,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273400524] [2020-10-15 20:04:46,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:46,590 INFO L87 Difference]: Start difference. First operand 336 states and 906 transitions. Second operand 19 states. [2020-10-15 20:04:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:47,635 INFO L93 Difference]: Finished difference Result 464 states and 1163 transitions. [2020-10-15 20:04:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:04:47,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:47,639 INFO L225 Difference]: With dead ends: 464 [2020-10-15 20:04:47,640 INFO L226 Difference]: Without dead ends: 459 [2020-10-15 20:04:47,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:04:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-10-15 20:04:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 341. [2020-10-15 20:04:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-15 20:04:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 921 transitions. [2020-10-15 20:04:47,644 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 921 transitions. Word has length 15 [2020-10-15 20:04:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:47,644 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 921 transitions. [2020-10-15 20:04:47,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:47,645 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 921 transitions. [2020-10-15 20:04:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:47,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:47,645 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:47,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-15 20:04:47,846 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1379705412, now seen corresponding path program 255 times [2020-10-15 20:04:47,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:47,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228441308] [2020-10-15 20:04:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228441308] [2020-10-15 20:04:48,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670861565] [2020-10-15 20:04:48,190 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 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 [2020-10-15 20:04:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:04:48,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:48,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:48,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:48,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:48,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:48,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453342601] [2020-10-15 20:04:48,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:48,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:48,656 INFO L87 Difference]: Start difference. First operand 341 states and 921 transitions. Second operand 19 states. [2020-10-15 20:04:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:49,537 INFO L93 Difference]: Finished difference Result 475 states and 1194 transitions. [2020-10-15 20:04:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:04:49,541 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:49,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:49,542 INFO L225 Difference]: With dead ends: 475 [2020-10-15 20:04:49,542 INFO L226 Difference]: Without dead ends: 469 [2020-10-15 20:04:49,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:04:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-10-15 20:04:49,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 342. [2020-10-15 20:04:49,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-15 20:04:49,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 924 transitions. [2020-10-15 20:04:49,548 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 924 transitions. Word has length 15 [2020-10-15 20:04:49,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:49,548 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 924 transitions. [2020-10-15 20:04:49,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:49,548 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 924 transitions. [2020-10-15 20:04:49,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:49,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:49,548 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:49,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:04:49,749 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1379734242, now seen corresponding path program 256 times [2020-10-15 20:04:49,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:49,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961194130] [2020-10-15 20:04:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:50,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961194130] [2020-10-15 20:04:50,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317181367] [2020-10-15 20:04:50,077 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 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 [2020-10-15 20:04:50,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:04:50,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:50,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:50,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:50,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:50,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:50,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853453074] [2020-10-15 20:04:50,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:50,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:50,636 INFO L87 Difference]: Start difference. First operand 342 states and 924 transitions. Second operand 19 states. [2020-10-15 20:04:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:51,749 INFO L93 Difference]: Finished difference Result 474 states and 1199 transitions. [2020-10-15 20:04:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:04:51,751 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:51,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:51,752 INFO L225 Difference]: With dead ends: 474 [2020-10-15 20:04:51,752 INFO L226 Difference]: Without dead ends: 468 [2020-10-15 20:04:51,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:04:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-15 20:04:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 340. [2020-10-15 20:04:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 20:04:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 20:04:51,757 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 20:04:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:51,757 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 20:04:51,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 20:04:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:51,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:51,758 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:51,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-10-15 20:04:51,959 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:51,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:51,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1407411042, now seen corresponding path program 257 times [2020-10-15 20:04:51,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:51,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337310231] [2020-10-15 20:04:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337310231] [2020-10-15 20:04:52,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809120588] [2020-10-15 20:04:52,291 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 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 [2020-10-15 20:04:52,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:04:52,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:52,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:52,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:04:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:52,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:04:52,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:04:52,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467784159] [2020-10-15 20:04:52,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:04:52,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:04:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:04:52,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:04:52,993 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 20:04:54,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:04:54,584 INFO L93 Difference]: Finished difference Result 478 states and 1207 transitions. [2020-10-15 20:04:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:04:54,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:04:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:04:54,589 INFO L225 Difference]: With dead ends: 478 [2020-10-15 20:04:54,589 INFO L226 Difference]: Without dead ends: 472 [2020-10-15 20:04:54,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:04:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-15 20:04:54,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 340. [2020-10-15 20:04:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-15 20:04:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 918 transitions. [2020-10-15 20:04:54,595 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 918 transitions. Word has length 15 [2020-10-15 20:04:54,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:04:54,595 INFO L481 AbstractCegarLoop]: Abstraction has 340 states and 918 transitions. [2020-10-15 20:04:54,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:04:54,595 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 918 transitions. [2020-10-15 20:04:54,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:04:54,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:04:54,595 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:04:54,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-10-15 20:04:54,796 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:04:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:04:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1407439872, now seen corresponding path program 258 times [2020-10-15 20:04:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:04:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333845246] [2020-10-15 20:04:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:04:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:04:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:04:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333845246] [2020-10-15 20:04:55,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076183552] [2020-10-15 20:04:55,084 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 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 [2020-10-15 20:04:55,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:04:55,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:04:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:04:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:01,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:01,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:01,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405438723] [2020-10-15 20:05:01,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:01,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:01,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:01,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 20:05:01,872 INFO L87 Difference]: Start difference. First operand 340 states and 918 transitions. Second operand 19 states. [2020-10-15 20:05:06,506 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 20:05:10,884 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 20:05:13,596 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 20:05:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:14,032 INFO L93 Difference]: Finished difference Result 461 states and 1164 transitions. [2020-10-15 20:05:14,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:14,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:14,036 INFO L225 Difference]: With dead ends: 461 [2020-10-15 20:05:14,036 INFO L226 Difference]: Without dead ends: 456 [2020-10-15 20:05:14,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 20:05:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-10-15 20:05:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 338. [2020-10-15 20:05:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-15 20:05:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 912 transitions. [2020-10-15 20:05:14,041 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 912 transitions. Word has length 15 [2020-10-15 20:05:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:14,041 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 912 transitions. [2020-10-15 20:05:14,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 912 transitions. [2020-10-15 20:05:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:14,042 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:14,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:14,242 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:14,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:14,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1408364354, now seen corresponding path program 259 times [2020-10-15 20:05:14,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:14,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263841489] [2020-10-15 20:05:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:14,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263841489] [2020-10-15 20:05:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168939116] [2020-10-15 20:05:14,519 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 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 [2020-10-15 20:05:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:14,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:14,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:14,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004999644] [2020-10-15 20:05:14,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:14,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:14,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:14,977 INFO L87 Difference]: Start difference. First operand 338 states and 912 transitions. Second operand 19 states. [2020-10-15 20:05:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:15,931 INFO L93 Difference]: Finished difference Result 438 states and 1112 transitions. [2020-10-15 20:05:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:05:15,935 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:15,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:15,936 INFO L225 Difference]: With dead ends: 438 [2020-10-15 20:05:15,936 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:05:15,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:05:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 339. [2020-10-15 20:05:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-15 20:05:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 907 transitions. [2020-10-15 20:05:15,942 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 907 transitions. Word has length 15 [2020-10-15 20:05:15,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:15,942 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 907 transitions. [2020-10-15 20:05:15,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:15,942 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 907 transitions. [2020-10-15 20:05:15,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:15,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:15,943 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:16,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:16,143 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:16,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:16,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2060879712, now seen corresponding path program 260 times [2020-10-15 20:05:16,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:16,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697565333] [2020-10-15 20:05:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697565333] [2020-10-15 20:05:16,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468892152] [2020-10-15 20:05:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:05:16,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:05:16,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:16,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:16,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:16,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819867088] [2020-10-15 20:05:16,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:16,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:16,946 INFO L87 Difference]: Start difference. First operand 339 states and 907 transitions. Second operand 19 states. [2020-10-15 20:05:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:17,918 INFO L93 Difference]: Finished difference Result 406 states and 1029 transitions. [2020-10-15 20:05:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:05:17,922 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:17,923 INFO L225 Difference]: With dead ends: 406 [2020-10-15 20:05:17,923 INFO L226 Difference]: Without dead ends: 403 [2020-10-15 20:05:17,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-15 20:05:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 345. [2020-10-15 20:05:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 20:05:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 923 transitions. [2020-10-15 20:05:17,937 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 923 transitions. Word has length 15 [2020-10-15 20:05:17,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:17,937 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 923 transitions. [2020-10-15 20:05:17,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:17,937 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 923 transitions. [2020-10-15 20:05:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:17,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:17,938 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:18,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:18,139 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:18,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2060878751, now seen corresponding path program 261 times [2020-10-15 20:05:18,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:18,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604107466] [2020-10-15 20:05:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:18,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604107466] [2020-10-15 20:05:18,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261942889] [2020-10-15 20:05:18,457 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 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 [2020-10-15 20:05:18,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:05:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:18,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:18,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:18,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664784927] [2020-10-15 20:05:18,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:18,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:18,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:18,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:18,965 INFO L87 Difference]: Start difference. First operand 345 states and 923 transitions. Second operand 19 states. [2020-10-15 20:05:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:19,876 INFO L93 Difference]: Finished difference Result 436 states and 1098 transitions. [2020-10-15 20:05:19,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:05:19,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:19,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:19,881 INFO L225 Difference]: With dead ends: 436 [2020-10-15 20:05:19,881 INFO L226 Difference]: Without dead ends: 432 [2020-10-15 20:05:19,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-15 20:05:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 344. [2020-10-15 20:05:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-15 20:05:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 920 transitions. [2020-10-15 20:05:19,887 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 920 transitions. Word has length 15 [2020-10-15 20:05:19,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:19,887 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 920 transitions. [2020-10-15 20:05:19,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:19,887 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 920 transitions. [2020-10-15 20:05:19,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:19,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:19,888 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:20,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-10-15 20:05:20,088 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2060849921, now seen corresponding path program 262 times [2020-10-15 20:05:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:20,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808575463] [2020-10-15 20:05:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808575463] [2020-10-15 20:05:20,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814136789] [2020-10-15 20:05:20,425 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 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 [2020-10-15 20:05:20,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:05:20,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:20,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:21,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533689696] [2020-10-15 20:05:21,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:21,475 INFO L87 Difference]: Start difference. First operand 344 states and 920 transitions. Second operand 19 states. [2020-10-15 20:05:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:22,589 INFO L93 Difference]: Finished difference Result 452 states and 1133 transitions. [2020-10-15 20:05:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:05:22,593 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:22,594 INFO L225 Difference]: With dead ends: 452 [2020-10-15 20:05:22,594 INFO L226 Difference]: Without dead ends: 447 [2020-10-15 20:05:22,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-15 20:05:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 343. [2020-10-15 20:05:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-15 20:05:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 917 transitions. [2020-10-15 20:05:22,600 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 917 transitions. Word has length 15 [2020-10-15 20:05:22,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:22,600 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 917 transitions. [2020-10-15 20:05:22,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 917 transitions. [2020-10-15 20:05:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:22,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:22,601 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:22,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:05:22,802 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:22,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2059956191, now seen corresponding path program 263 times [2020-10-15 20:05:22,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:22,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864891594] [2020-10-15 20:05:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:23,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864891594] [2020-10-15 20:05:23,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625551595] [2020-10-15 20:05:23,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-15 20:05:23,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:05:23,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:23,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:23,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:23,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:23,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:23,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421926643] [2020-10-15 20:05:23,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:23,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:23,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:23,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:23,697 INFO L87 Difference]: Start difference. First operand 343 states and 917 transitions. Second operand 19 states. [2020-10-15 20:05:25,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:25,106 INFO L93 Difference]: Finished difference Result 451 states and 1130 transitions. [2020-10-15 20:05:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:05:25,109 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:25,110 INFO L225 Difference]: With dead ends: 451 [2020-10-15 20:05:25,110 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 20:05:25,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:05:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 20:05:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 350. [2020-10-15 20:05:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:05:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 936 transitions. [2020-10-15 20:05:25,116 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 936 transitions. Word has length 15 [2020-10-15 20:05:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:25,116 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 936 transitions. [2020-10-15 20:05:25,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 936 transitions. [2020-10-15 20:05:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:25,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:25,117 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:25,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-10-15 20:05:25,317 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:25,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2059955230, now seen corresponding path program 264 times [2020-10-15 20:05:25,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:25,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752082507] [2020-10-15 20:05:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752082507] [2020-10-15 20:05:25,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411299930] [2020-10-15 20:05:25,642 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 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 [2020-10-15 20:05:25,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:05:25,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:34,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:34,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090486105] [2020-10-15 20:05:34,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-10-15 20:05:34,521 INFO L87 Difference]: Start difference. First operand 350 states and 936 transitions. Second operand 19 states. [2020-10-15 20:05:39,205 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-15 20:05:43,480 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-15 20:05:45,999 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-15 20:05:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:46,625 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 20:05:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:46,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:46,630 INFO L225 Difference]: With dead ends: 481 [2020-10-15 20:05:46,630 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 20:05:46,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-10-15 20:05:46,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 20:05:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2020-10-15 20:05:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 20:05:46,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 945 transitions. [2020-10-15 20:05:46,636 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 945 transitions. Word has length 15 [2020-10-15 20:05:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:46,636 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 945 transitions. [2020-10-15 20:05:46,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 945 transitions. [2020-10-15 20:05:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:46,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:46,637 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:46,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-15 20:05:46,838 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2059926400, now seen corresponding path program 265 times [2020-10-15 20:05:46,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:46,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125905565] [2020-10-15 20:05:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125905565] [2020-10-15 20:05:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070294289] [2020-10-15 20:05:47,134 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 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 [2020-10-15 20:05:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:47,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:47,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:47,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:47,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:47,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608441121] [2020-10-15 20:05:47,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:47,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:47,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:47,899 INFO L87 Difference]: Start difference. First operand 353 states and 945 transitions. Second operand 19 states. [2020-10-15 20:05:49,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:49,651 INFO L93 Difference]: Finished difference Result 482 states and 1207 transitions. [2020-10-15 20:05:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:05:49,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:49,657 INFO L225 Difference]: With dead ends: 482 [2020-10-15 20:05:49,657 INFO L226 Difference]: Without dead ends: 476 [2020-10-15 20:05:49,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-10-15 20:05:49,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-15 20:05:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 351. [2020-10-15 20:05:49,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 20:05:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 939 transitions. [2020-10-15 20:05:49,664 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 939 transitions. Word has length 15 [2020-10-15 20:05:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:49,664 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 939 transitions. [2020-10-15 20:05:49,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 939 transitions. [2020-10-15 20:05:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:49,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:49,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:49,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-15 20:05:49,865 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:49,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2032250561, now seen corresponding path program 266 times [2020-10-15 20:05:49,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:49,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869215773] [2020-10-15 20:05:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869215773] [2020-10-15 20:05:50,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53978709] [2020-10-15 20:05:50,198 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 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 [2020-10-15 20:05:50,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:05:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:50,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:50,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:50,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600873581] [2020-10-15 20:05:50,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:50,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:50,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:50,699 INFO L87 Difference]: Start difference. First operand 351 states and 939 transitions. Second operand 19 states. [2020-10-15 20:05:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:51,937 INFO L93 Difference]: Finished difference Result 460 states and 1154 transitions. [2020-10-15 20:05:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:51,940 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:51,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:51,942 INFO L225 Difference]: With dead ends: 460 [2020-10-15 20:05:51,942 INFO L226 Difference]: Without dead ends: 455 [2020-10-15 20:05:51,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:05:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-15 20:05:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 356. [2020-10-15 20:05:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-15 20:05:51,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 952 transitions. [2020-10-15 20:05:51,948 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 952 transitions. Word has length 15 [2020-10-15 20:05:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:51,948 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 952 transitions. [2020-10-15 20:05:51,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 952 transitions. [2020-10-15 20:05:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:51,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:51,949 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:52,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-15 20:05:52,150 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2032220770, now seen corresponding path program 267 times [2020-10-15 20:05:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:52,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703805230] [2020-10-15 20:05:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:52,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703805230] [2020-10-15 20:05:52,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558650570] [2020-10-15 20:05:52,480 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 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 [2020-10-15 20:05:52,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:05:52,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:52,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:52,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:52,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:52,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298439164] [2020-10-15 20:05:52,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:52,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:52,942 INFO L87 Difference]: Start difference. First operand 356 states and 952 transitions. Second operand 19 states. [2020-10-15 20:05:53,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:53,881 INFO L93 Difference]: Finished difference Result 481 states and 1200 transitions. [2020-10-15 20:05:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:05:53,885 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:53,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:53,886 INFO L225 Difference]: With dead ends: 481 [2020-10-15 20:05:53,886 INFO L226 Difference]: Without dead ends: 475 [2020-10-15 20:05:53,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:05:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-10-15 20:05:53,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 354. [2020-10-15 20:05:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:05:53,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 946 transitions. [2020-10-15 20:05:53,892 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 946 transitions. Word has length 15 [2020-10-15 20:05:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:53,893 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 946 transitions. [2020-10-15 20:05:53,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:53,893 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 946 transitions. [2020-10-15 20:05:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:53,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:53,893 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:54,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-10-15 20:05:54,094 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -2031296288, now seen corresponding path program 268 times [2020-10-15 20:05:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:54,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423285192] [2020-10-15 20:05:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423285192] [2020-10-15 20:05:54,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087452188] [2020-10-15 20:05:54,449 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 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 [2020-10-15 20:05:54,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:05:54,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:55,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:55,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051467082] [2020-10-15 20:05:55,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:55,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:55,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:55,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:55,016 INFO L87 Difference]: Start difference. First operand 354 states and 946 transitions. Second operand 19 states. [2020-10-15 20:05:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:56,256 INFO L93 Difference]: Finished difference Result 442 states and 1116 transitions. [2020-10-15 20:05:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:05:56,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:56,261 INFO L225 Difference]: With dead ends: 442 [2020-10-15 20:05:56,261 INFO L226 Difference]: Without dead ends: 423 [2020-10-15 20:05:56,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:05:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-15 20:05:56,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 352. [2020-10-15 20:05:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-15 20:05:56,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 940 transitions. [2020-10-15 20:05:56,276 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 940 transitions. Word has length 15 [2020-10-15 20:05:56,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:56,276 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 940 transitions. [2020-10-15 20:05:56,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:56,276 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 940 transitions. [2020-10-15 20:05:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:56,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:56,277 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:56,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-15 20:05:56,478 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:56,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1173375070, now seen corresponding path program 269 times [2020-10-15 20:05:56,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:56,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377064375] [2020-10-15 20:05:56,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377064375] [2020-10-15 20:05:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783142109] [2020-10-15 20:05:56,827 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 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 [2020-10-15 20:05:56,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-15 20:05:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:05:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:57,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:05:57,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:05:57,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399850365] [2020-10-15 20:05:57,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:05:57,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:05:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:05:57,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:05:57,546 INFO L87 Difference]: Start difference. First operand 352 states and 940 transitions. Second operand 19 states. [2020-10-15 20:05:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:05:58,753 INFO L93 Difference]: Finished difference Result 456 states and 1147 transitions. [2020-10-15 20:05:58,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 20:05:58,757 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:05:58,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:05:58,758 INFO L225 Difference]: With dead ends: 456 [2020-10-15 20:05:58,758 INFO L226 Difference]: Without dead ends: 450 [2020-10-15 20:05:58,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-15 20:05:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-10-15 20:05:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 350. [2020-10-15 20:05:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:05:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 934 transitions. [2020-10-15 20:05:58,764 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 934 transitions. Word has length 15 [2020-10-15 20:05:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:05:58,764 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 934 transitions. [2020-10-15 20:05:58,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:05:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 934 transitions. [2020-10-15 20:05:58,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:05:58,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:05:58,765 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:05:58,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-10-15 20:05:58,966 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:05:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:05:58,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1173345279, now seen corresponding path program 270 times [2020-10-15 20:05:58,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:05:58,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945240963] [2020-10-15 20:05:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:05:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:05:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:05:59,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945240963] [2020-10-15 20:05:59,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612140090] [2020-10-15 20:05:59,365 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 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 [2020-10-15 20:05:59,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-15 20:05:59,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:05:59,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:05:59,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:05,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:05,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:05,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302308006] [2020-10-15 20:06:05,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:05,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:05,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:05,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:05,965 INFO L87 Difference]: Start difference. First operand 350 states and 934 transitions. Second operand 19 states. [2020-10-15 20:06:06,264 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:06:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:07,580 INFO L93 Difference]: Finished difference Result 466 states and 1163 transitions. [2020-10-15 20:06:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 20:06:07,583 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:07,584 INFO L225 Difference]: With dead ends: 466 [2020-10-15 20:06:07,584 INFO L226 Difference]: Without dead ends: 446 [2020-10-15 20:06:07,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2020-10-15 20:06:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-15 20:06:07,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 345. [2020-10-15 20:06:07,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2020-10-15 20:06:07,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 919 transitions. [2020-10-15 20:06:07,589 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 919 transitions. Word has length 15 [2020-10-15 20:06:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:07,589 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 919 transitions. [2020-10-15 20:06:07,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 919 transitions. [2020-10-15 20:06:07,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:07,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:07,590 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:07,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:07,791 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1143823359, now seen corresponding path program 271 times [2020-10-15 20:06:07,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:07,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312281221] [2020-10-15 20:06:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:08,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312281221] [2020-10-15 20:06:08,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352976744] [2020-10-15 20:06:08,224 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 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 [2020-10-15 20:06:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:08,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:08,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:08,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893617678] [2020-10-15 20:06:08,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:08,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:08,870 INFO L87 Difference]: Start difference. First operand 345 states and 919 transitions. Second operand 19 states. [2020-10-15 20:06:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:09,716 INFO L93 Difference]: Finished difference Result 437 states and 1106 transitions. [2020-10-15 20:06:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:06:09,719 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:09,720 INFO L225 Difference]: With dead ends: 437 [2020-10-15 20:06:09,721 INFO L226 Difference]: Without dead ends: 422 [2020-10-15 20:06:09,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=436, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-15 20:06:09,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 350. [2020-10-15 20:06:09,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-15 20:06:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 928 transitions. [2020-10-15 20:06:09,729 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 928 transitions. Word has length 15 [2020-10-15 20:06:09,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:09,729 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 928 transitions. [2020-10-15 20:06:09,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 928 transitions. [2020-10-15 20:06:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:09,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:09,731 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:09,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2020-10-15 20:06:09,947 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:09,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:09,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1143822398, now seen corresponding path program 272 times [2020-10-15 20:06:09,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:09,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305728479] [2020-10-15 20:06:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305728479] [2020-10-15 20:06:10,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128233620] [2020-10-15 20:06:10,426 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 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 [2020-10-15 20:06:10,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:10,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:10,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:11,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:11,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:11,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459155869] [2020-10-15 20:06:11,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:11,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:11,063 INFO L87 Difference]: Start difference. First operand 350 states and 928 transitions. Second operand 19 states. [2020-10-15 20:06:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:11,915 INFO L93 Difference]: Finished difference Result 433 states and 1087 transitions. [2020-10-15 20:06:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 20:06:11,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:11,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:11,918 INFO L225 Difference]: With dead ends: 433 [2020-10-15 20:06:11,919 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:06:11,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:06:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2020-10-15 20:06:11,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-15 20:06:11,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 925 transitions. [2020-10-15 20:06:11,923 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 925 transitions. Word has length 15 [2020-10-15 20:06:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 925 transitions. [2020-10-15 20:06:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 925 transitions. [2020-10-15 20:06:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:11,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:11,924 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:12,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:12,125 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 439565519, now seen corresponding path program 273 times [2020-10-15 20:06:12,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:12,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311382966] [2020-10-15 20:06:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311382966] [2020-10-15 20:06:12,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610753568] [2020-10-15 20:06:12,697 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 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 [2020-10-15 20:06:12,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-15 20:06:12,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:12,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:12,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:13,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:13,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:13,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420209361] [2020-10-15 20:06:13,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:13,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:13,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:13,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:13,273 INFO L87 Difference]: Start difference. First operand 349 states and 925 transitions. Second operand 19 states. [2020-10-15 20:06:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:13,471 INFO L93 Difference]: Finished difference Result 394 states and 1001 transitions. [2020-10-15 20:06:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 20:06:13,475 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:13,476 INFO L225 Difference]: With dead ends: 394 [2020-10-15 20:06:13,476 INFO L226 Difference]: Without dead ends: 392 [2020-10-15 20:06:13,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-10-15 20:06:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-15 20:06:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 357. [2020-10-15 20:06:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-10-15 20:06:13,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 949 transitions. [2020-10-15 20:06:13,481 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 949 transitions. Word has length 15 [2020-10-15 20:06:13,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:13,482 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 949 transitions. [2020-10-15 20:06:13,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:13,482 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 949 transitions. [2020-10-15 20:06:13,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:13,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:13,482 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:13,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:13,683 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:13,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:13,683 INFO L82 PathProgramCache]: Analyzing trace with hash 439566480, now seen corresponding path program 274 times [2020-10-15 20:06:13,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:13,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513456175] [2020-10-15 20:06:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:14,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513456175] [2020-10-15 20:06:14,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034094749] [2020-10-15 20:06:14,137 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 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 [2020-10-15 20:06:14,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:14,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:14,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:14,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825948266] [2020-10-15 20:06:14,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:14,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:14,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:14,951 INFO L87 Difference]: Start difference. First operand 357 states and 949 transitions. Second operand 19 states. [2020-10-15 20:06:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:15,735 INFO L93 Difference]: Finished difference Result 420 states and 1064 transitions. [2020-10-15 20:06:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:15,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:15,738 INFO L225 Difference]: With dead ends: 420 [2020-10-15 20:06:15,739 INFO L226 Difference]: Without dead ends: 417 [2020-10-15 20:06:15,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2020-10-15 20:06:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-15 20:06:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 355. [2020-10-15 20:06:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:06:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:06:15,744 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:06:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:15,744 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:06:15,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:06:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:15,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:15,745 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:15,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:15,946 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash 439595310, now seen corresponding path program 275 times [2020-10-15 20:06:15,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:15,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485712721] [2020-10-15 20:06:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485712721] [2020-10-15 20:06:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19651388] [2020-10-15 20:06:16,420 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 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 [2020-10-15 20:06:16,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:16,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:21,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:21,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:21,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284252004] [2020-10-15 20:06:21,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:21,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:21,088 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:06:22,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:22,116 INFO L93 Difference]: Finished difference Result 452 states and 1140 transitions. [2020-10-15 20:06:22,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 20:06:22,120 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:22,121 INFO L225 Difference]: With dead ends: 452 [2020-10-15 20:06:22,121 INFO L226 Difference]: Without dead ends: 448 [2020-10-15 20:06:22,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-15 20:06:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2020-10-15 20:06:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 353. [2020-10-15 20:06:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-10-15 20:06:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 937 transitions. [2020-10-15 20:06:22,128 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 937 transitions. Word has length 15 [2020-10-15 20:06:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:22,128 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 937 transitions. [2020-10-15 20:06:22,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:22,128 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 937 transitions. [2020-10-15 20:06:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:22,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:22,129 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:22,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-15 20:06:22,329 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash 440489040, now seen corresponding path program 276 times [2020-10-15 20:06:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:22,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390236689] [2020-10-15 20:06:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:22,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390236689] [2020-10-15 20:06:22,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24415134] [2020-10-15 20:06:22,773 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 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 [2020-10-15 20:06:22,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-15 20:06:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:29,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:29,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:29,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833095553] [2020-10-15 20:06:29,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:29,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:29,454 INFO L87 Difference]: Start difference. First operand 353 states and 937 transitions. Second operand 19 states. [2020-10-15 20:06:30,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:30,866 INFO L93 Difference]: Finished difference Result 446 states and 1118 transitions. [2020-10-15 20:06:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 20:06:30,871 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:30,872 INFO L225 Difference]: With dead ends: 446 [2020-10-15 20:06:30,872 INFO L226 Difference]: Without dead ends: 443 [2020-10-15 20:06:30,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-15 20:06:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 355. [2020-10-15 20:06:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:06:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:06:30,878 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:06:30,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:30,878 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:06:30,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:06:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:30,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:30,878 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:31,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-15 20:06:31,079 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 440490001, now seen corresponding path program 277 times [2020-10-15 20:06:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:31,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960695333] [2020-10-15 20:06:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960695333] [2020-10-15 20:06:31,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16283254] [2020-10-15 20:06:31,541 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 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 [2020-10-15 20:06:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:31,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:31,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:36,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:36,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634499210] [2020-10-15 20:06:36,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:36,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:36,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:36,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=251, Unknown=1, NotChecked=0, Total=342 [2020-10-15 20:06:36,267 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:06:40,839 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-15 20:06:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:41,916 INFO L93 Difference]: Finished difference Result 483 states and 1210 transitions. [2020-10-15 20:06:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:06:41,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:41,919 INFO L225 Difference]: With dead ends: 483 [2020-10-15 20:06:41,919 INFO L226 Difference]: Without dead ends: 478 [2020-10-15 20:06:41,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=256, Invalid=555, Unknown=1, NotChecked=0, Total=812 [2020-10-15 20:06:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2020-10-15 20:06:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 355. [2020-10-15 20:06:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-15 20:06:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 943 transitions. [2020-10-15 20:06:41,924 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 943 transitions. Word has length 15 [2020-10-15 20:06:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:41,924 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 943 transitions. [2020-10-15 20:06:41,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 943 transitions. [2020-10-15 20:06:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:41,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:41,925 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:42,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-15 20:06:42,126 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:42,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:42,126 INFO L82 PathProgramCache]: Analyzing trace with hash 440518831, now seen corresponding path program 278 times [2020-10-15 20:06:42,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:42,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734269838] [2020-10-15 20:06:42,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734269838] [2020-10-15 20:06:42,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727748299] [2020-10-15 20:06:42,578 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 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 [2020-10-15 20:06:42,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-15 20:06:42,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:43,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:43,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495720991] [2020-10-15 20:06:43,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:43,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:43,403 INFO L87 Difference]: Start difference. First operand 355 states and 943 transitions. Second operand 19 states. [2020-10-15 20:06:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:44,811 INFO L93 Difference]: Finished difference Result 469 states and 1175 transitions. [2020-10-15 20:06:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 20:06:44,817 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:44,818 INFO L225 Difference]: With dead ends: 469 [2020-10-15 20:06:44,818 INFO L226 Difference]: Without dead ends: 465 [2020-10-15 20:06:44,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2020-10-15 20:06:44,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-15 20:06:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 351. [2020-10-15 20:06:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-10-15 20:06:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 931 transitions. [2020-10-15 20:06:44,823 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 931 transitions. Word has length 15 [2020-10-15 20:06:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:44,823 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 931 transitions. [2020-10-15 20:06:44,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 931 transitions. [2020-10-15 20:06:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:44,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:44,824 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-15 20:06:45,025 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 468194670, now seen corresponding path program 279 times [2020-10-15 20:06:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:45,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799390541] [2020-10-15 20:06:45,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:45,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799390541] [2020-10-15 20:06:45,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215111603] [2020-10-15 20:06:45,470 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 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 [2020-10-15 20:06:45,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-15 20:06:45,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:45,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:50,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:50,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:50,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224636670] [2020-10-15 20:06:50,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:50,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:50,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:50,365 INFO L87 Difference]: Start difference. First operand 351 states and 931 transitions. Second operand 19 states. [2020-10-15 20:06:51,459 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-10-15 20:06:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:52,163 INFO L93 Difference]: Finished difference Result 440 states and 1101 transitions. [2020-10-15 20:06:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:06:52,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:52,169 INFO L225 Difference]: With dead ends: 440 [2020-10-15 20:06:52,169 INFO L226 Difference]: Without dead ends: 437 [2020-10-15 20:06:52,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=312, Invalid=680, Unknown=0, NotChecked=0, Total=992 [2020-10-15 20:06:52,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-15 20:06:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 354. [2020-10-15 20:06:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:06:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 20:06:52,176 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 20:06:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:52,176 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 20:06:52,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 20:06:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:52,177 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:52,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 20:06:52,379 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:52,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash 468195631, now seen corresponding path program 280 times [2020-10-15 20:06:52,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:52,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809749232] [2020-10-15 20:06:52,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809749232] [2020-10-15 20:06:52,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219448285] [2020-10-15 20:06:52,803 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 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 [2020-10-15 20:06:52,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-15 20:06:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:06:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:53,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:06:53,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:06:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361765674] [2020-10-15 20:06:53,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:06:53,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:06:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:06:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-15 20:06:53,477 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 20:06:54,722 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-10-15 20:06:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 20:06:55,238 INFO L93 Difference]: Finished difference Result 478 states and 1194 transitions. [2020-10-15 20:06:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 20:06:55,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-10-15 20:06:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 20:06:55,244 INFO L225 Difference]: With dead ends: 478 [2020-10-15 20:06:55,245 INFO L226 Difference]: Without dead ends: 473 [2020-10-15 20:06:55,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=291, Invalid=639, Unknown=0, NotChecked=0, Total=930 [2020-10-15 20:06:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-10-15 20:06:55,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 354. [2020-10-15 20:06:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-15 20:06:55,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 940 transitions. [2020-10-15 20:06:55,252 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 940 transitions. Word has length 15 [2020-10-15 20:06:55,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 20:06:55,252 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 940 transitions. [2020-10-15 20:06:55,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 20:06:55,252 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 940 transitions. [2020-10-15 20:06:55,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 20:06:55,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 20:06:55,253 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 20:06:55,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-15 20:06:55,468 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 20:06:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 20:06:55,468 INFO L82 PathProgramCache]: Analyzing trace with hash 468224461, now seen corresponding path program 281 times [2020-10-15 20:06:55,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 20:06:55,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197428988] [2020-10-15 20:06:55,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 20:06:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 20:06:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:06:55,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197428988] [2020-10-15 20:06:55,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108902562] [2020-10-15 20:06:55,902 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 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 [2020-10-15 20:06:55,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-15 20:06:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-15 20:06:55,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-15 20:06:55,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 20:07:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 20:07:13,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 20:07:13,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-15 20:07:13,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842377828] [2020-10-15 20:07:13,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 20:07:13,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 20:07:13,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 20:07:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=249, Unknown=4, NotChecked=0, Total=342 [2020-10-15 20:07:13,865 INFO L87 Difference]: Start difference. First operand 354 states and 940 transitions. Second operand 19 states. [2020-10-15 20:07:18,364 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 Received shutdown request... [2020-10-15 20:07:22,115 WARN L210 SmtUtils]: Removed 3 from assertion stack [2020-10-15 20:07:22,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 20:07:22,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-15 20:07:22,317 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-15 20:07:22,323 WARN L235 ceAbstractionStarter]: Timeout [2020-10-15 20:07:22,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:07:22 BasicIcfg [2020-10-15 20:07:22,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-15 20:07:22,325 INFO L168 Benchmark]: Toolchain (without parser) took 872349.01 ms. Allocated memory was 248.0 MB in the beginning and 218.1 MB in the end (delta: -29.9 MB). Free memory was 201.7 MB in the beginning and 128.5 MB in the end (delta: 73.2 MB). Peak memory consumption was 43.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:22,325 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:22,326 INFO L168 Benchmark]: CACSL2BoogieTranslator took 708.36 ms. Allocated memory was 248.0 MB in the beginning and 306.2 MB in the end (delta: 58.2 MB). Free memory was 201.7 MB in the beginning and 261.5 MB in the end (delta: -59.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:22,326 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.64 ms. Allocated memory is still 306.2 MB. Free memory is still 261.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-15 20:07:22,326 INFO L168 Benchmark]: Boogie Preprocessor took 61.80 ms. Allocated memory is still 306.2 MB. Free memory was 261.5 MB in the beginning and 259.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:22,326 INFO L168 Benchmark]: RCFGBuilder took 393.53 ms. Allocated memory is still 306.2 MB. Free memory was 259.0 MB in the beginning and 236.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:22,326 INFO L168 Benchmark]: TraceAbstraction took 871093.90 ms. Allocated memory was 306.2 MB in the beginning and 218.1 MB in the end (delta: -88.1 MB). Free memory was 236.9 MB in the beginning and 128.5 MB in the end (delta: 108.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. [2020-10-15 20:07:22,329 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 248.0 MB. Free memory is still 224.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 708.36 ms. Allocated memory was 248.0 MB in the beginning and 306.2 MB in the end (delta: 58.2 MB). Free memory was 201.7 MB in the beginning and 261.5 MB in the end (delta: -59.9 MB). Peak memory consumption was 32.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 83.64 ms. Allocated memory is still 306.2 MB. Free memory is still 261.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 61.80 ms. Allocated memory is still 306.2 MB. Free memory was 261.5 MB in the beginning and 259.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 393.53 ms. Allocated memory is still 306.2 MB. Free memory was 259.0 MB in the beginning and 236.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.1 MB. Max. memory is 14.2 GB. * TraceAbstraction took 871093.90 ms. Allocated memory was 306.2 MB in the beginning and 218.1 MB in the end (delta: -88.1 MB). Free memory was 236.9 MB in the beginning and 128.5 MB in the end (delta: 108.4 MB). Peak memory consumption was 20.3 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 697 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 50 TotalNumberOfCompositions, 943 MoverChecksTotal - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (354states) and FLOYD_HOARE automaton (currently 15 states, 19 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 33 for 2012ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 870.9s, OverallIterations: 317, TraceHistogramMax: 7, AutomataDifference: 526.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 4189 SDtfs, 36952 SDslu, 32779 SDs, 0 SdLazy, 23379 SolverSat, 9775 SolverUnsat, 58 SolverUnknown, 0 SolverNotchecked, 146.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9346 GetRequests, 1544 SyntacticMatches, 286 SemanticMatches, 7515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51332 ImplicationChecksByTransitivity, 607.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=309, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 316 MinimizatonAttempts, 20687 StatesRemovedByMinimization, 314 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 4.8s SatisfiabilityAnalysisTime, 262.2s InterpolantComputationTime, 8308 NumberOfCodeBlocks, 8306 NumberOfCodeBlocksAsserted, 1006 NumberOfCheckSat, 7682 ConstructedInterpolants, 51 QuantifiedInterpolants, 892634 SizeOfPredicates, 307 NumberOfNonLiveVariables, 27976 ConjunctsInSsa, 3224 ConjunctsInUnsatCore, 626 InterpolantComputations, 10 PerfectInterpolantSequences, 42/3966 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