/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-16 13:53:45,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 13:53:45,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 13:53:45,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 13:53:45,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 13:53:45,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 13:53:45,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 13:53:45,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 13:53:45,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 13:53:45,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 13:53:45,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 13:53:45,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 13:53:45,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 13:53:45,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 13:53:45,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 13:53:45,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 13:53:45,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 13:53:45,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 13:53:45,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 13:53:45,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 13:53:45,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 13:53:45,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 13:53:45,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 13:53:45,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 13:53:45,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-16 13:53:45,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 13:53:45,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 13:53:45,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 13:53:45,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 13:53:45,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 13:53:45,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 13:53:45,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 13:53:45,934 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 13:53:45,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 13:53:45,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 13:53:45,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 13:53:45,939 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-16 13:53:45,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 13:53:45,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 13:53:45,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 13:53:45,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 13:53:45,993 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 13:53:45,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 13:53:45,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 13:53:45,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 13:53:45,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 13:53:45,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 13:53:45,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 13:53:45,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 13:53:45,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 13:53:45,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 13:53:45,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 13:53:45,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 13:53:45,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 13:53:45,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 13:53:45,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 13:53:45,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 13:53:45,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 13:53:45,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 13:53:45,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 13:53:45,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-16 13:53:45,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 13:53:45,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 13:53:45,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 13:53:46,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 13:53:46,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-16 13:53:46,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-16 13:53:47,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 13:53:47,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 13:53:47,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 13:53:47,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 13:53:47,304 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 13:53:47,305 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-16 13:53:47,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9e5e208/45e7d1ade77b4d1c8255f9ccf767ec8c/FLAGec1ed86d1 [2020-09-16 13:53:48,046 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 13:53:48,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-16 13:53:48,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9e5e208/45e7d1ade77b4d1c8255f9ccf767ec8c/FLAGec1ed86d1 [2020-09-16 13:53:48,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc9e5e208/45e7d1ade77b4d1c8255f9ccf767ec8c [2020-09-16 13:53:48,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 13:53:48,301 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 13:53:48,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 13:53:48,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 13:53:48,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 13:53:48,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:48,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a52987c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:48, skipping insertion in model container [2020-09-16 13:53:48,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:53:48" (1/1) ... [2020-09-16 13:53:48,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 13:53:48,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 13:53:48,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 13:53:48,929 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 13:53:48,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 13:53:49,057 INFO L208 MainTranslator]: Completed translation [2020-09-16 13:53:49,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49 WrapperNode [2020-09-16 13:53:49,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 13:53:49,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 13:53:49,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 13:53:49,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 13:53:49,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 13:53:49,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 13:53:49,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 13:53:49,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 13:53:49,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,134 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... [2020-09-16 13:53:49,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 13:53:49,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 13:53:49,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 13:53:49,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 13:53:49,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 13:53:49,226 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-16 13:53:49,227 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-16 13:53:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-16 13:53:49,227 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-16 13:53:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 13:53:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-16 13:53:49,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 13:53:49,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 13:53:49,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-16 13:53:49,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 13:53:49,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 13:53:49,230 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 13:53:49,610 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 13:53:49,610 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-16 13:53:49,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:53:49 BoogieIcfgContainer [2020-09-16 13:53:49,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 13:53:49,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 13:53:49,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 13:53:49,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 13:53:49,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 01:53:48" (1/3) ... [2020-09-16 13:53:49,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:53:49, skipping insertion in model container [2020-09-16 13:53:49,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:53:49" (2/3) ... [2020-09-16 13:53:49,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:53:49, skipping insertion in model container [2020-09-16 13:53:49,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:53:49" (3/3) ... [2020-09-16 13:53:49,626 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-16 13:53:49,639 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 13:53:49,640 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-16 13:53:49,650 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 13:53:49,651 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 13:53:49,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,685 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,686 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,686 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,687 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,687 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,688 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,688 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,691 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,691 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,692 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,692 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,697 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,697 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,698 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,705 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,705 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,705 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,706 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,706 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,706 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 13:53:49,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-16 13:53:49,758 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 13:53:49,758 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 13:53:49,758 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-16 13:53:49,758 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-16 13:53:49,758 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 13:53:49,759 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 13:53:49,759 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 13:53:49,759 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 13:53:49,777 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,780 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,825 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-16 13:53:49,826 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 13:53:49,835 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. [2020-09-16 13:53:49,838 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-16 13:53:49,856 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-16 13:53:49,857 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-16 13:53:49,858 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. [2020-09-16 13:53:49,860 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-16 13:53:49,861 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-16 13:53:51,202 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-16 13:53:51,348 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-16 13:53:51,348 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-16 13:53:51,353 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-16 13:53:51,368 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-16 13:53:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-16 13:53:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 13:53:51,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:51,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-16 13:53:51,383 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-16 13:53:51,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:51,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695762954] [2020-09-16 13:53:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:51,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:51,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695762954] [2020-09-16 13:53:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:51,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 13:53:51,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324457401] [2020-09-16 13:53:51,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 13:53:51,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 13:53:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-16 13:53:51,720 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-16 13:53:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:51,802 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-16 13:53:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 13:53:51,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-16 13:53:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:51,824 INFO L225 Difference]: With dead ends: 83 [2020-09-16 13:53:51,824 INFO L226 Difference]: Without dead ends: 54 [2020-09-16 13:53:51,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-16 13:53:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-16 13:53:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-16 13:53:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-16 13:53:51,887 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-16 13:53:51,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:51,888 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-16 13:53:51,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 13:53:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-16 13:53:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:51,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:51,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:51,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 13:53:51,890 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-16 13:53:51,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:51,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129586924] [2020-09-16 13:53:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129586924] [2020-09-16 13:53:52,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:52,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:52,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723189407] [2020-09-16 13:53:52,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:52,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,016 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-16 13:53:52,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,075 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-16 13:53:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:52,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:52,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,078 INFO L225 Difference]: With dead ends: 80 [2020-09-16 13:53:52,078 INFO L226 Difference]: Without dead ends: 75 [2020-09-16 13:53:52,079 INFO L675 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 [2020-09-16 13:53:52,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-16 13:53:52,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-16 13:53:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-16 13:53:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-16 13:53:52,090 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-16 13:53:52,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,091 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-16 13:53:52,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-16 13:53:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 13:53:52,093 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-16 13:53:52,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053326369] [2020-09-16 13:53:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053326369] [2020-09-16 13:53:52,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:52,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:52,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760307385] [2020-09-16 13:53:52,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:52,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:52,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,200 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-16 13:53:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,235 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-16 13:53:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 13:53:52,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,237 INFO L225 Difference]: With dead ends: 73 [2020-09-16 13:53:52,238 INFO L226 Difference]: Without dead ends: 70 [2020-09-16 13:53:52,238 INFO L675 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 [2020-09-16 13:53:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-16 13:53:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-16 13:53:52,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-16 13:53:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-16 13:53:52,248 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-16 13:53:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,248 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-16 13:53:52,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-16 13:53:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 13:53:52,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 13:53:52,250 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-16 13:53:52,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051106644] [2020-09-16 13:53:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051106644] [2020-09-16 13:53:52,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:52,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 13:53:52,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967529072] [2020-09-16 13:53:52,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-16 13:53:52,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-16 13:53:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 13:53:52,335 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-16 13:53:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,400 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-16 13:53:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:52,400 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-16 13:53:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,402 INFO L225 Difference]: With dead ends: 86 [2020-09-16 13:53:52,402 INFO L226 Difference]: Without dead ends: 80 [2020-09-16 13:53:52,403 INFO L675 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 [2020-09-16 13:53:52,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-16 13:53:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-16 13:53:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-16 13:53:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-16 13:53:52,412 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-16 13:53:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,412 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-16 13:53:52,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-16 13:53:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-16 13:53:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:52,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,414 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:52,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-16 13:53:52,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:52,415 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-16 13:53:52,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:52,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508815526] [2020-09-16 13:53:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508815526] [2020-09-16 13:53:52,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122369519] [2020-09-16 13:53:52,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:52,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:52,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:52,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:53:52,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:52,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:52,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-16 13:53:52,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145632403] [2020-09-16 13:53:52,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-16 13:53:52,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-16 13:53:52,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-16 13:53:52,748 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-16 13:53:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:52,823 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-16 13:53:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:52,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-16 13:53:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:52,825 INFO L225 Difference]: With dead ends: 101 [2020-09-16 13:53:52,825 INFO L226 Difference]: Without dead ends: 96 [2020-09-16 13:53:52,826 INFO L675 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 [2020-09-16 13:53:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-16 13:53:52,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-16 13:53:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-16 13:53:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-16 13:53:52,834 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-16 13:53:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:52,834 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-16 13:53:52,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-16 13:53:52,835 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-16 13:53:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:52,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:52,836 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:53,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,050 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:53,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-16 13:53:53,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:53,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293586361] [2020-09-16 13:53:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293586361] [2020-09-16 13:53:53,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367615888] [2020-09-16 13:53:53,174 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 [2020-09-16 13:53:53,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:53,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:53,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:53,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:53,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:53,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262222561] [2020-09-16 13:53:53,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:53,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:53,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,303 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-16 13:53:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:53,335 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-16 13:53:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 13:53:53,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:53,337 INFO L225 Difference]: With dead ends: 84 [2020-09-16 13:53:53,337 INFO L226 Difference]: Without dead ends: 81 [2020-09-16 13:53:53,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-16 13:53:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-16 13:53:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-16 13:53:53,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-16 13:53:53,345 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-16 13:53:53,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:53,345 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-16 13:53:53,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-16 13:53:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:53,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:53,347 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:53,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:53,560 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:53,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-16 13:53:53,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:53,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130429467] [2020-09-16 13:53:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130429467] [2020-09-16 13:53:53,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595107058] [2020-09-16 13:53:53,643 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 [2020-09-16 13:53:53,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:53:53,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:53,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:53,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:53,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:53,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776842698] [2020-09-16 13:53:53,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:53,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:53,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:53,765 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-16 13:53:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:53,823 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-16 13:53:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:53,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:53,826 INFO L225 Difference]: With dead ends: 90 [2020-09-16 13:53:53,826 INFO L226 Difference]: Without dead ends: 87 [2020-09-16 13:53:53,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-16 13:53:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-16 13:53:53,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-16 13:53:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-16 13:53:53,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-16 13:53:53,834 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-16 13:53:53,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:53,834 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-16 13:53:53,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:53,834 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-16 13:53:53,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 13:53:53,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:53,835 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:54,047 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-16 13:53:54,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841560932] [2020-09-16 13:53:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841560932] [2020-09-16 13:53:54,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121695541] [2020-09-16 13:53:54,140 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 [2020-09-16 13:53:54,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:54,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-16 13:53:54,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:54,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:53:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:54,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 13:53:54,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823345925] [2020-09-16 13:53:54,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:53:54,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:53:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:53:54,275 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-16 13:53:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,373 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-16 13:53:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:54,373 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-16 13:53:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,374 INFO L225 Difference]: With dead ends: 99 [2020-09-16 13:53:54,374 INFO L226 Difference]: Without dead ends: 93 [2020-09-16 13:53:54,375 INFO L675 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 [2020-09-16 13:53:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-16 13:53:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-16 13:53:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-16 13:53:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-16 13:53:54,382 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-16 13:53:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,382 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-16 13:53:54,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:53:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-16 13:53:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:54,599 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-16 13:53:54,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061208902] [2020-09-16 13:53:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061208902] [2020-09-16 13:53:54,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772587323] [2020-09-16 13:53:54,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,676 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-16 13:53:54,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,706 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-16 13:53:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-16 13:53:54,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:54,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,707 INFO L225 Difference]: With dead ends: 92 [2020-09-16 13:53:54,708 INFO L226 Difference]: Without dead ends: 90 [2020-09-16 13:53:54,708 INFO L675 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 [2020-09-16 13:53:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-16 13:53:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-16 13:53:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-16 13:53:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-16 13:53:54,714 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-16 13:53:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,715 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-16 13:53:54,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-16 13:53:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-16 13:53:54,717 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-16 13:53:54,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808205383] [2020-09-16 13:53:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808205383] [2020-09-16 13:53:54,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690131686] [2020-09-16 13:53:54,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,815 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-16 13:53:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:54,864 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-16 13:53:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:54,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:54,866 INFO L225 Difference]: With dead ends: 100 [2020-09-16 13:53:54,866 INFO L226 Difference]: Without dead ends: 98 [2020-09-16 13:53:54,866 INFO L675 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 [2020-09-16 13:53:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-16 13:53:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-16 13:53:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-16 13:53:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-16 13:53:54,872 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-16 13:53:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:54,873 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-16 13:53:54,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-16 13:53:54,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:54,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:54,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:54,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-16 13:53:54,874 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:54,875 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-16 13:53:54,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:54,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167320564] [2020-09-16 13:53:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:54,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:54,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167320564] [2020-09-16 13:53:54,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:54,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:54,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134963930] [2020-09-16 13:53:54,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:54,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:54,966 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-16 13:53:55,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,053 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-16 13:53:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:55,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:55,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,055 INFO L225 Difference]: With dead ends: 105 [2020-09-16 13:53:55,055 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 13:53:55,055 INFO L675 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 [2020-09-16 13:53:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 13:53:55,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-16 13:53:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 13:53:55,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-16 13:53:55,066 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-16 13:53:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,067 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-16 13:53:55,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-16 13:53:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-16 13:53:55,071 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-16 13:53:55,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776084538] [2020-09-16 13:53:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776084538] [2020-09-16 13:53:55,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 13:53:55,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-16 13:53:55,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991359546] [2020-09-16 13:53:55,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 13:53:55,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:55,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 13:53:55,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-16 13:53:55,151 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-16 13:53:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,223 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-16 13:53:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:55,223 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-16 13:53:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,224 INFO L225 Difference]: With dead ends: 105 [2020-09-16 13:53:55,225 INFO L226 Difference]: Without dead ends: 100 [2020-09-16 13:53:55,225 INFO L675 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 [2020-09-16 13:53:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-16 13:53:55,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-16 13:53:55,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-16 13:53:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-16 13:53:55,230 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-16 13:53:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,230 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-16 13:53:55,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 13:53:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-16 13:53:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,231 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-16 13:53:55,232 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,232 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-16 13:53:55,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245934309] [2020-09-16 13:53:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245934309] [2020-09-16 13:53:55,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653637683] [2020-09-16 13:53:55,320 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:55,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:55,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:55,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:55,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:53:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:55,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-16 13:53:55,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102803856] [2020-09-16 13:53:55,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-16 13:53:55,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:55,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-16 13:53:55,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:53:55,455 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-16 13:53:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:55,568 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-16 13:53:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:53:55,568 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-16 13:53:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:55,570 INFO L225 Difference]: With dead ends: 122 [2020-09-16 13:53:55,570 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 13:53:55,570 INFO L675 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 [2020-09-16 13:53:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 13:53:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-16 13:53:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-16 13:53:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-16 13:53:55,575 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-16 13:53:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:55,575 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-16 13:53:55,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-16 13:53:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-16 13:53:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:55,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:55,576 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:55,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 13:53:55,777 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:55,778 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-16 13:53:55,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:55,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916287027] [2020-09-16 13:53:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:55,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916287027] [2020-09-16 13:53:55,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696061692] [2020-09-16 13:53:55,883 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 [2020-09-16 13:53:55,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:53:55,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:55,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:56,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:56,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170938431] [2020-09-16 13:53:56,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:56,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:56,048 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-16 13:53:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:56,106 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-16 13:53:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:56,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:56,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:56,108 INFO L225 Difference]: With dead ends: 108 [2020-09-16 13:53:56,108 INFO L226 Difference]: Without dead ends: 105 [2020-09-16 13:53:56,109 INFO L675 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 [2020-09-16 13:53:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-16 13:53:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-16 13:53:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-16 13:53:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-16 13:53:56,118 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-16 13:53:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:56,119 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-16 13:53:56,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-16 13:53:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:56,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:56,120 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:56,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:56,333 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:56,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:56,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-16 13:53:56,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:56,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422631868] [2020-09-16 13:53:56,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422631868] [2020-09-16 13:53:56,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315912774] [2020-09-16 13:53:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:56,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:56,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:56,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:56,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692687533] [2020-09-16 13:53:56,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:56,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:56,593 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-16 13:53:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:56,659 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-16 13:53:56,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:56,659 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:56,661 INFO L225 Difference]: With dead ends: 116 [2020-09-16 13:53:56,661 INFO L226 Difference]: Without dead ends: 113 [2020-09-16 13:53:56,662 INFO L675 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 [2020-09-16 13:53:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-16 13:53:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-16 13:53:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-16 13:53:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-16 13:53:56,666 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-16 13:53:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:56,666 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-16 13:53:56,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-16 13:53:56,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:56,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:56,668 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:56,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-16 13:53:56,879 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-16 13:53:56,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:56,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080853311] [2020-09-16 13:53:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:56,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:56,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080853311] [2020-09-16 13:53:56,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783877695] [2020-09-16 13:53:56,968 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 [2020-09-16 13:53:57,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:57,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:57,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:57,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:57,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:57,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302856234] [2020-09-16 13:53:57,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:57,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:57,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:57,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:57,114 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-16 13:53:57,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:57,221 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-16 13:53:57,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:53:57,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:57,224 INFO L225 Difference]: With dead ends: 115 [2020-09-16 13:53:57,224 INFO L226 Difference]: Without dead ends: 112 [2020-09-16 13:53:57,225 INFO L675 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 [2020-09-16 13:53:57,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-16 13:53:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-16 13:53:57,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 13:53:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-16 13:53:57,229 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-16 13:53:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:57,229 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-16 13:53:57,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:57,230 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-16 13:53:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-16 13:53:57,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:57,230 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:57,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-16 13:53:57,442 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-16 13:53:57,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:57,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346644255] [2020-09-16 13:53:57,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346644255] [2020-09-16 13:53:57,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551878504] [2020-09-16 13:53:57,520 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 [2020-09-16 13:53:57,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:53:57,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:57,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:57,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:53:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:57,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:57,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:57,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035802136] [2020-09-16 13:53:57,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:57,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:57,656 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-16 13:53:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:57,789 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-16 13:53:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:53:57,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-16 13:53:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:57,791 INFO L225 Difference]: With dead ends: 124 [2020-09-16 13:53:57,791 INFO L226 Difference]: Without dead ends: 118 [2020-09-16 13:53:57,792 INFO L675 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 [2020-09-16 13:53:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-16 13:53:57,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-16 13:53:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-16 13:53:57,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-16 13:53:57,796 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-16 13:53:57,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:57,796 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-16 13:53:57,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-16 13:53:57,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:57,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:57,797 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:58,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-16 13:53:58,008 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:58,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-16 13:53:58,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:58,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386932895] [2020-09-16 13:53:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386932895] [2020-09-16 13:53:58,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692498496] [2020-09-16 13:53:58,087 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 [2020-09-16 13:53:58,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:58,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:58,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049565030] [2020-09-16 13:53:58,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:58,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:58,268 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-16 13:53:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:58,331 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-16 13:53:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 13:53:58,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:58,333 INFO L225 Difference]: With dead ends: 113 [2020-09-16 13:53:58,333 INFO L226 Difference]: Without dead ends: 111 [2020-09-16 13:53:58,334 INFO L675 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 [2020-09-16 13:53:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-16 13:53:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-16 13:53:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-16 13:53:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-16 13:53:58,338 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-16 13:53:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:58,338 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-16 13:53:58,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-16 13:53:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:58,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:58,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:58,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 13:53:58,540 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:58,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:58,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-16 13:53:58,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:58,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649893784] [2020-09-16 13:53:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649893784] [2020-09-16 13:53:58,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126376815] [2020-09-16 13:53:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:58,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:53:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:58,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:58,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:58,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471157748] [2020-09-16 13:53:58,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:58,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:58,751 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-16 13:53:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:58,821 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-16 13:53:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:58,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:58,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:58,823 INFO L225 Difference]: With dead ends: 118 [2020-09-16 13:53:58,823 INFO L226 Difference]: Without dead ends: 116 [2020-09-16 13:53:58,823 INFO L675 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 [2020-09-16 13:53:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-16 13:53:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-16 13:53:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-16 13:53:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-16 13:53:58,827 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-16 13:53:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:58,827 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-16 13:53:58,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:58,828 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-16 13:53:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:58,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:58,828 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:59,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,037 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:59,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-16 13:53:59,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:59,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586245050] [2020-09-16 13:53:59,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586245050] [2020-09-16 13:53:59,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657254583] [2020-09-16 13:53:59,122 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 [2020-09-16 13:53:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:59,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:59,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:59,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367561867] [2020-09-16 13:53:59,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:59,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:59,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:59,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:59,262 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-16 13:53:59,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:59,332 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-16 13:53:59,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:59,332 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:59,333 INFO L225 Difference]: With dead ends: 119 [2020-09-16 13:53:59,333 INFO L226 Difference]: Without dead ends: 117 [2020-09-16 13:53:59,334 INFO L675 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 [2020-09-16 13:53:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-16 13:53:59,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-16 13:53:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-16 13:53:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-16 13:53:59,338 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-16 13:53:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:59,338 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-16 13:53:59,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-16 13:53:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:59,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:59,339 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:53:59,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:53:59,549 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:53:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:53:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-16 13:53:59,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:53:59,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76409700] [2020-09-16 13:53:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:53:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:53:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76409700] [2020-09-16 13:53:59,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190096647] [2020-09-16 13:53:59,643 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 [2020-09-16 13:53:59,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:53:59,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:53:59,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:53:59,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:53:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:53:59,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:53:59,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:53:59,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198932874] [2020-09-16 13:53:59,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:53:59,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:53:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:53:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:53:59,783 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-16 13:53:59,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:53:59,862 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-16 13:53:59,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:53:59,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:53:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:53:59,865 INFO L225 Difference]: With dead ends: 122 [2020-09-16 13:53:59,865 INFO L226 Difference]: Without dead ends: 120 [2020-09-16 13:53:59,866 INFO L675 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 [2020-09-16 13:53:59,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-16 13:53:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-16 13:53:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-16 13:53:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-16 13:53:59,873 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-16 13:53:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:53:59,874 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-16 13:53:59,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:53:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-16 13:53:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:53:59,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:53:59,875 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:00,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-16 13:54:00,076 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:00,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-16 13:54:00,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:00,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110145386] [2020-09-16 13:54:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110145386] [2020-09-16 13:54:00,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255939012] [2020-09-16 13:54:00,172 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 [2020-09-16 13:54:00,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:00,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:00,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:00,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:00,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:00,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124857327] [2020-09-16 13:54:00,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:00,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:00,341 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:00,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:00,459 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-16 13:54:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:00,460 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:00,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:00,461 INFO L225 Difference]: With dead ends: 123 [2020-09-16 13:54:00,461 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 13:54:00,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:00,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 13:54:00,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-16 13:54:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:00,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-16 13:54:00,466 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-16 13:54:00,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:00,467 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-16 13:54:00,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:00,467 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-16 13:54:00,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:00,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:00,468 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:00,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:00,679 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-16 13:54:00,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:00,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160492354] [2020-09-16 13:54:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:00,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160492354] [2020-09-16 13:54:00,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372748401] [2020-09-16 13:54:00,769 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 [2020-09-16 13:54:00,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:00,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:00,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:00,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085713653] [2020-09-16 13:54:00,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:00,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:00,912 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-16 13:54:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:00,998 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-16 13:54:00,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:00,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:01,000 INFO L225 Difference]: With dead ends: 123 [2020-09-16 13:54:01,000 INFO L226 Difference]: Without dead ends: 121 [2020-09-16 13:54:01,000 INFO L675 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 [2020-09-16 13:54:01,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-16 13:54:01,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-16 13:54:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-16 13:54:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-16 13:54:01,007 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-16 13:54:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:01,007 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-16 13:54:01,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-16 13:54:01,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:01,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:01,011 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:01,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-16 13:54:01,222 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:01,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-16 13:54:01,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:01,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783565271] [2020-09-16 13:54:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783565271] [2020-09-16 13:54:01,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098962783] [2020-09-16 13:54:01,305 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 [2020-09-16 13:54:01,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:01,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:01,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:01,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:01,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:01,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720748199] [2020-09-16 13:54:01,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:01,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:01,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:01,493 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-16 13:54:01,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:01,713 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-16 13:54:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:01,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:01,715 INFO L225 Difference]: With dead ends: 133 [2020-09-16 13:54:01,715 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 13:54:01,715 INFO L675 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 [2020-09-16 13:54:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 13:54:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-16 13:54:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-16 13:54:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-16 13:54:01,720 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-16 13:54:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:01,720 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-16 13:54:01,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-16 13:54:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:01,721 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:01,721 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:01,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:01,922 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:01,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:01,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-16 13:54:01,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:01,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017036519] [2020-09-16 13:54:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:01,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017036519] [2020-09-16 13:54:01,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989691828] [2020-09-16 13:54:01,997 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 [2020-09-16 13:54:02,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:02,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:02,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:02,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383680738] [2020-09-16 13:54:02,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:02,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:02,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:02,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:02,139 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:02,284 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-16 13:54:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:02,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:02,286 INFO L225 Difference]: With dead ends: 127 [2020-09-16 13:54:02,286 INFO L226 Difference]: Without dead ends: 125 [2020-09-16 13:54:02,287 INFO L675 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 [2020-09-16 13:54:02,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-16 13:54:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-16 13:54:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-16 13:54:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-16 13:54:02,292 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-16 13:54:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:02,292 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-16 13:54:02,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-16 13:54:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:02,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:02,294 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:02,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 13:54:02,506 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-16 13:54:02,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:02,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749293997] [2020-09-16 13:54:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749293997] [2020-09-16 13:54:02,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195870207] [2020-09-16 13:54:02,575 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 [2020-09-16 13:54:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:02,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:02,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:02,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:02,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:02,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069157812] [2020-09-16 13:54:02,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:02,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:02,742 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-16 13:54:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:03,012 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-16 13:54:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:03,013 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:03,014 INFO L225 Difference]: With dead ends: 141 [2020-09-16 13:54:03,015 INFO L226 Difference]: Without dead ends: 136 [2020-09-16 13:54:03,015 INFO L675 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 [2020-09-16 13:54:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-16 13:54:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-16 13:54:03,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-16 13:54:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-16 13:54:03,021 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-16 13:54:03,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:03,022 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-16 13:54:03,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-16 13:54:03,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:03,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:03,023 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:03,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-16 13:54:03,235 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-16 13:54:03,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:03,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990708441] [2020-09-16 13:54:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990708441] [2020-09-16 13:54:03,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723828506] [2020-09-16 13:54:03,316 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 [2020-09-16 13:54:03,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:03,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:03,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:03,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:03,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:03,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643647202] [2020-09-16 13:54:03,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:03,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:03,428 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-16 13:54:03,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:03,629 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-16 13:54:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:03,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:03,633 INFO L225 Difference]: With dead ends: 136 [2020-09-16 13:54:03,633 INFO L226 Difference]: Without dead ends: 131 [2020-09-16 13:54:03,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-16 13:54:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-16 13:54:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-16 13:54:03,638 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-16 13:54:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:03,638 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-16 13:54:03,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-16 13:54:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:03,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:03,639 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:03,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-16 13:54:03,852 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:03,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-16 13:54:03,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:03,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916481435] [2020-09-16 13:54:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:03,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916481435] [2020-09-16 13:54:03,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725878545] [2020-09-16 13:54:03,939 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 [2020-09-16 13:54:03,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:04,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:04,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316969669] [2020-09-16 13:54:04,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:04,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:04,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:04,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:04,075 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-16 13:54:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:04,187 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-16 13:54:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:04,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:04,189 INFO L225 Difference]: With dead ends: 130 [2020-09-16 13:54:04,189 INFO L226 Difference]: Without dead ends: 128 [2020-09-16 13:54:04,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-16 13:54:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-16 13:54:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-16 13:54:04,197 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-16 13:54:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:04,197 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-16 13:54:04,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-16 13:54:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:04,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:04,198 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:04,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 13:54:04,409 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-16 13:54:04,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:04,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197466797] [2020-09-16 13:54:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197466797] [2020-09-16 13:54:04,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556479369] [2020-09-16 13:54:04,484 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 [2020-09-16 13:54:04,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:04,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:04,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:04,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:04,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:04,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:04,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576132270] [2020-09-16 13:54:04,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:04,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:04,634 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-16 13:54:04,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:04,795 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-16 13:54:04,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:04,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:04,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:04,796 INFO L225 Difference]: With dead ends: 131 [2020-09-16 13:54:04,796 INFO L226 Difference]: Without dead ends: 129 [2020-09-16 13:54:04,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-16 13:54:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-16 13:54:04,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:04,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-16 13:54:04,802 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-16 13:54:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:04,804 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-16 13:54:04,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-16 13:54:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:04,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:04,805 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:05,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-16 13:54:05,015 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:05,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:05,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-16 13:54:05,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:05,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074059919] [2020-09-16 13:54:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074059919] [2020-09-16 13:54:05,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824488104] [2020-09-16 13:54:05,108 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 [2020-09-16 13:54:05,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:05,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:05,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:05,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:05,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:05,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:05,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817850437] [2020-09-16 13:54:05,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:05,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:05,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:05,232 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:05,406 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-16 13:54:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:05,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:05,410 INFO L225 Difference]: With dead ends: 131 [2020-09-16 13:54:05,410 INFO L226 Difference]: Without dead ends: 126 [2020-09-16 13:54:05,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:05,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-16 13:54:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-16 13:54:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-16 13:54:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-16 13:54:05,415 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-16 13:54:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:05,415 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-16 13:54:05,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-16 13:54:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:05,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:05,416 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:05,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:05,627 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:05,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:05,628 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-16 13:54:05,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:05,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031404378] [2020-09-16 13:54:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:05,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031404378] [2020-09-16 13:54:05,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976169403] [2020-09-16 13:54:05,703 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 [2020-09-16 13:54:05,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:05,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:05,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:05,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:05,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:05,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:05,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:05,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846966038] [2020-09-16 13:54:05,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:05,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:05,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:05,807 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-16 13:54:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:06,082 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-16 13:54:06,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:06,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:06,085 INFO L225 Difference]: With dead ends: 145 [2020-09-16 13:54:06,085 INFO L226 Difference]: Without dead ends: 140 [2020-09-16 13:54:06,085 INFO L675 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 [2020-09-16 13:54:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-16 13:54:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-16 13:54:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-16 13:54:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-16 13:54:06,090 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-16 13:54:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:06,090 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-16 13:54:06,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-16 13:54:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:06,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:06,091 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:06,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-16 13:54:06,303 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-16 13:54:06,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:06,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443542531] [2020-09-16 13:54:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443542531] [2020-09-16 13:54:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229552982] [2020-09-16 13:54:06,376 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 [2020-09-16 13:54:06,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-16 13:54:06,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:06,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:06,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:06,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-16 13:54:06,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221185944] [2020-09-16 13:54:06,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:54:06,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:54:06,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:54:06,521 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-16 13:54:06,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:06,751 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-16 13:54:06,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:06,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-16 13:54:06,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:06,753 INFO L225 Difference]: With dead ends: 135 [2020-09-16 13:54:06,754 INFO L226 Difference]: Without dead ends: 130 [2020-09-16 13:54:06,754 INFO L675 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 [2020-09-16 13:54:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-16 13:54:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-16 13:54:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-16 13:54:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-16 13:54:06,761 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-16 13:54:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:06,761 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-16 13:54:06,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:54:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-16 13:54:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:06,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:06,763 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:06,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:06,977 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:06,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:06,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-16 13:54:06,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:06,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782272410] [2020-09-16 13:54:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782272410] [2020-09-16 13:54:07,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125424997] [2020-09-16 13:54:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:07,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:07,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:07,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:07,268 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:07,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-16 13:54:07,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474603514] [2020-09-16 13:54:07,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-16 13:54:07,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-16 13:54:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:07,293 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-16 13:54:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:07,423 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-16 13:54:07,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:07,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-16 13:54:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:07,425 INFO L225 Difference]: With dead ends: 143 [2020-09-16 13:54:07,425 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 13:54:07,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:07,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 13:54:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-16 13:54:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-16 13:54:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-16 13:54:07,430 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-16 13:54:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:07,430 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-16 13:54:07,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-16 13:54:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-16 13:54:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:07,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:07,431 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:07,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-16 13:54:07,641 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-16 13:54:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:07,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526119112] [2020-09-16 13:54:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:07,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526119112] [2020-09-16 13:54:07,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711600366] [2020-09-16 13:54:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:07,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:07,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:07,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:07,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639865893] [2020-09-16 13:54:07,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:07,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:07,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:07,942 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-16 13:54:07,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:07,997 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-16 13:54:07,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:54:07,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:07,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:07,999 INFO L225 Difference]: With dead ends: 132 [2020-09-16 13:54:07,999 INFO L226 Difference]: Without dead ends: 129 [2020-09-16 13:54:07,999 INFO L675 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 [2020-09-16 13:54:08,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-16 13:54:08,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-16 13:54:08,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-16 13:54:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-16 13:54:08,003 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-16 13:54:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:08,003 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-16 13:54:08,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-16 13:54:08,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:08,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:08,004 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:08,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-16 13:54:08,213 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-16 13:54:08,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:08,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522035850] [2020-09-16 13:54:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522035850] [2020-09-16 13:54:08,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799136490] [2020-09-16 13:54:08,336 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 [2020-09-16 13:54:08,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:08,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:08,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:08,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130778925] [2020-09-16 13:54:08,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:08,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:08,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:08,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:08,505 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-16 13:54:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:08,568 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-16 13:54:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:08,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:08,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:08,570 INFO L225 Difference]: With dead ends: 143 [2020-09-16 13:54:08,570 INFO L226 Difference]: Without dead ends: 140 [2020-09-16 13:54:08,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-16 13:54:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-16 13:54:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-16 13:54:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-16 13:54:08,574 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-16 13:54:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:08,574 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-16 13:54:08,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-16 13:54:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:08,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:08,575 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:08,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-16 13:54:08,784 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:08,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:08,785 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-16 13:54:08,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:08,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281859472] [2020-09-16 13:54:08,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:08,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281859472] [2020-09-16 13:54:08,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790216388] [2020-09-16 13:54:08,876 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 [2020-09-16 13:54:08,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:08,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:09,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:09,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136672304] [2020-09-16 13:54:09,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:09,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:09,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:09,032 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-16 13:54:09,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:09,145 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-16 13:54:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:09,146 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:09,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:09,148 INFO L225 Difference]: With dead ends: 142 [2020-09-16 13:54:09,148 INFO L226 Difference]: Without dead ends: 139 [2020-09-16 13:54:09,149 INFO L675 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 [2020-09-16 13:54:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-16 13:54:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-16 13:54:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-16 13:54:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-16 13:54:09,155 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-16 13:54:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:09,155 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-16 13:54:09,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-16 13:54:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:09,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:09,157 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:09,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-16 13:54:09,370 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:09,371 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-16 13:54:09,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:09,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270217115] [2020-09-16 13:54:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270217115] [2020-09-16 13:54:09,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683455313] [2020-09-16 13:54:09,485 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 [2020-09-16 13:54:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:09,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:09,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:09,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:09,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103441478] [2020-09-16 13:54:09,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:09,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:09,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:09,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:09,638 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-16 13:54:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:09,758 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-16 13:54:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:09,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:09,760 INFO L225 Difference]: With dead ends: 141 [2020-09-16 13:54:09,760 INFO L226 Difference]: Without dead ends: 138 [2020-09-16 13:54:09,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:09,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-16 13:54:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-16 13:54:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-16 13:54:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-16 13:54:09,769 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-16 13:54:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:09,770 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-16 13:54:09,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:09,770 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-16 13:54:09,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 13:54:09,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:09,771 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:09,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-16 13:54:09,972 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:09,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:09,972 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-16 13:54:09,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:09,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889773075] [2020-09-16 13:54:09,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889773075] [2020-09-16 13:54:10,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96235982] [2020-09-16 13:54:10,076 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 [2020-09-16 13:54:10,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:10,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:10,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:10,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:10,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041397090] [2020-09-16 13:54:10,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:10,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:10,236 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-16 13:54:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:10,412 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-16 13:54:10,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:10,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-16 13:54:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:10,414 INFO L225 Difference]: With dead ends: 150 [2020-09-16 13:54:10,414 INFO L226 Difference]: Without dead ends: 144 [2020-09-16 13:54:10,414 INFO L675 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 [2020-09-16 13:54:10,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-16 13:54:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-16 13:54:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-16 13:54:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-16 13:54:10,418 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-16 13:54:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:10,419 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-16 13:54:10,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-16 13:54:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:10,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:10,419 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:10,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:10,630 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:10,631 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-16 13:54:10,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:10,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928921714] [2020-09-16 13:54:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:10,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928921714] [2020-09-16 13:54:10,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535910120] [2020-09-16 13:54:10,722 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 [2020-09-16 13:54:10,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:10,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:10,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:10,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:10,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:10,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:10,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548809219] [2020-09-16 13:54:10,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:10,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:10,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:10,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:10,894 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-16 13:54:10,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:10,961 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-16 13:54:10,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-16 13:54:10,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:10,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:10,963 INFO L225 Difference]: With dead ends: 138 [2020-09-16 13:54:10,963 INFO L226 Difference]: Without dead ends: 136 [2020-09-16 13:54:10,964 INFO L675 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 [2020-09-16 13:54:10,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-16 13:54:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-16 13:54:10,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-16 13:54:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-16 13:54:10,967 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-16 13:54:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:10,968 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-16 13:54:10,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-16 13:54:10,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:10,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:10,969 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:11,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-16 13:54:11,170 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-16 13:54:11,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:11,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11621641] [2020-09-16 13:54:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11621641] [2020-09-16 13:54:11,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683167698] [2020-09-16 13:54:11,260 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 [2020-09-16 13:54:11,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:11,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:11,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:11,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:11,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473585522] [2020-09-16 13:54:11,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:11,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:11,439 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-16 13:54:11,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:11,554 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-16 13:54:11,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:11,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:11,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:11,556 INFO L225 Difference]: With dead ends: 145 [2020-09-16 13:54:11,556 INFO L226 Difference]: Without dead ends: 143 [2020-09-16 13:54:11,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-16 13:54:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-16 13:54:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-16 13:54:11,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-16 13:54:11,560 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-16 13:54:11,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:11,561 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-16 13:54:11,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-16 13:54:11,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:11,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:11,562 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:11,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-16 13:54:11,771 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-16 13:54:11,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:11,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623234900] [2020-09-16 13:54:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:11,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623234900] [2020-09-16 13:54:11,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089848192] [2020-09-16 13:54:11,864 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 [2020-09-16 13:54:11,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:11,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:11,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:12,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:12,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503202442] [2020-09-16 13:54:12,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:12,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:12,043 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-16 13:54:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:12,207 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-16 13:54:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:12,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:12,209 INFO L225 Difference]: With dead ends: 150 [2020-09-16 13:54:12,209 INFO L226 Difference]: Without dead ends: 148 [2020-09-16 13:54:12,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-16 13:54:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-16 13:54:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-16 13:54:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-16 13:54:12,214 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-16 13:54:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:12,214 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-16 13:54:12,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-16 13:54:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:12,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:12,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:12,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:12,425 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:12,426 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-16 13:54:12,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:12,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891722115] [2020-09-16 13:54:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891722115] [2020-09-16 13:54:12,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440132683] [2020-09-16 13:54:12,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:12,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:12,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:12,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:12,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:12,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:12,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:12,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453861907] [2020-09-16 13:54:12,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:12,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:12,726 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:12,848 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-16 13:54:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:12,849 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:12,851 INFO L225 Difference]: With dead ends: 148 [2020-09-16 13:54:12,851 INFO L226 Difference]: Without dead ends: 146 [2020-09-16 13:54:12,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-16 13:54:12,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-16 13:54:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-16 13:54:12,855 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-16 13:54:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:12,855 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-16 13:54:12,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-16 13:54:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:12,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:12,857 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:13,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-16 13:54:13,066 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:13,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:13,067 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-16 13:54:13,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:13,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251565559] [2020-09-16 13:54:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:13,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251565559] [2020-09-16 13:54:13,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124225698] [2020-09-16 13:54:13,160 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 [2020-09-16 13:54:13,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:13,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:13,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:13,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:13,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:13,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276985649] [2020-09-16 13:54:13,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:13,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:13,319 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-16 13:54:13,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:13,481 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-16 13:54:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:13,482 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:13,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:13,484 INFO L225 Difference]: With dead ends: 149 [2020-09-16 13:54:13,484 INFO L226 Difference]: Without dead ends: 147 [2020-09-16 13:54:13,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:54:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-16 13:54:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-16 13:54:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-16 13:54:13,488 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-16 13:54:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:13,489 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-16 13:54:13,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-16 13:54:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:13,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:13,490 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:13,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:13,701 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:13,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:13,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-16 13:54:13,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:13,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520656978] [2020-09-16 13:54:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:13,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520656978] [2020-09-16 13:54:13,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043492694] [2020-09-16 13:54:13,839 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 [2020-09-16 13:54:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:13,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:13,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:14,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:14,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112324971] [2020-09-16 13:54:14,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:14,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:14,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:14,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:14,014 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-16 13:54:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:14,081 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-16 13:54:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:14,082 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:14,083 INFO L225 Difference]: With dead ends: 152 [2020-09-16 13:54:14,083 INFO L226 Difference]: Without dead ends: 150 [2020-09-16 13:54:14,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-16 13:54:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-16 13:54:14,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-16 13:54:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-16 13:54:14,088 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-16 13:54:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:14,089 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-16 13:54:14,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:14,089 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-16 13:54:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:14,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:14,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:14,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-16 13:54:14,299 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-16 13:54:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:14,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622304749] [2020-09-16 13:54:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622304749] [2020-09-16 13:54:14,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013560542] [2020-09-16 13:54:14,400 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 [2020-09-16 13:54:14,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:14,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:14,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:14,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:14,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:14,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585935706] [2020-09-16 13:54:14,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:14,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:14,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:14,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:14,575 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-16 13:54:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:14,745 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-16 13:54:14,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:14,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:14,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:14,747 INFO L225 Difference]: With dead ends: 153 [2020-09-16 13:54:14,748 INFO L226 Difference]: Without dead ends: 151 [2020-09-16 13:54:14,748 INFO L675 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 [2020-09-16 13:54:14,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-16 13:54:14,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-16 13:54:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-16 13:54:14,752 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-16 13:54:14,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:14,752 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-16 13:54:14,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-16 13:54:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:14,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:14,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:14,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-16 13:54:14,964 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:14,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-16 13:54:14,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:14,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921058822] [2020-09-16 13:54:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921058822] [2020-09-16 13:54:15,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310527627] [2020-09-16 13:54:15,063 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 [2020-09-16 13:54:15,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:15,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:15,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:15,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584433440] [2020-09-16 13:54:15,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:15,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:15,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:15,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:15,259 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-16 13:54:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:15,447 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:15,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:15,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:15,453 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:15,453 INFO L226 Difference]: Without dead ends: 154 [2020-09-16 13:54:15,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-16 13:54:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-16 13:54:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-16 13:54:15,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-16 13:54:15,458 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-16 13:54:15,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:15,458 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-16 13:54:15,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:15,458 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-16 13:54:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:15,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:15,459 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:15,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-16 13:54:15,669 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-16 13:54:15,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:15,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301330956] [2020-09-16 13:54:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301330956] [2020-09-16 13:54:15,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981853221] [2020-09-16 13:54:15,780 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 [2020-09-16 13:54:15,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:15,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:15,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:15,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:15,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629466453] [2020-09-16 13:54:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:15,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:15,954 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-16 13:54:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:16,063 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-16 13:54:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:16,063 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:16,065 INFO L225 Difference]: With dead ends: 148 [2020-09-16 13:54:16,065 INFO L226 Difference]: Without dead ends: 146 [2020-09-16 13:54:16,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:16,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-16 13:54:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-16 13:54:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-16 13:54:16,070 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-16 13:54:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:16,070 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-16 13:54:16,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-16 13:54:16,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:16,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:16,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:16,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-16 13:54:16,281 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:16,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-16 13:54:16,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:16,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168621719] [2020-09-16 13:54:16,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:16,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168621719] [2020-09-16 13:54:16,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689508292] [2020-09-16 13:54:16,379 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 [2020-09-16 13:54:16,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:16,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:16,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:16,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808245786] [2020-09-16 13:54:16,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:16,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:16,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:16,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:16,550 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:16,760 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-16 13:54:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:16,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:16,762 INFO L225 Difference]: With dead ends: 157 [2020-09-16 13:54:16,762 INFO L226 Difference]: Without dead ends: 155 [2020-09-16 13:54:16,762 INFO L675 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 [2020-09-16 13:54:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-16 13:54:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-16 13:54:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:16,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-16 13:54:16,766 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-16 13:54:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:16,766 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-16 13:54:16,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-16 13:54:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:16,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:16,767 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:16,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:16,977 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:16,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-16 13:54:16,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:16,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913842909] [2020-09-16 13:54:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913842909] [2020-09-16 13:54:17,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785057493] [2020-09-16 13:54:17,065 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 [2020-09-16 13:54:17,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:54:17,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:17,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-16 13:54:17,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946915419] [2020-09-16 13:54:17,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 13:54:17,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 13:54:17,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-16 13:54:17,134 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-16 13:54:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:17,240 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-16 13:54:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:17,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-16 13:54:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:17,242 INFO L225 Difference]: With dead ends: 149 [2020-09-16 13:54:17,243 INFO L226 Difference]: Without dead ends: 147 [2020-09-16 13:54:17,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-16 13:54:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-16 13:54:17,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-16 13:54:17,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:17,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:17,248 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:17,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:17,248 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:17,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 13:54:17,248 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:17,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:17,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:17,249 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:17,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-16 13:54:17,459 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:17,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:17,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-16 13:54:17,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:17,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666185865] [2020-09-16 13:54:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666185865] [2020-09-16 13:54:17,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532688537] [2020-09-16 13:54:17,550 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 [2020-09-16 13:54:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:17,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:17,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:17,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:17,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:17,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858268621] [2020-09-16 13:54:17,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:17,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:17,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:17,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:17,735 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:18,023 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-16 13:54:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:18,024 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:18,025 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:18,025 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:18,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:18,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:18,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-16 13:54:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-16 13:54:18,029 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-16 13:54:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:18,029 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-16 13:54:18,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:18,030 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-16 13:54:18,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:18,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:18,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:18,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-16 13:54:18,242 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:18,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-16 13:54:18,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:18,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650533964] [2020-09-16 13:54:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:18,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650533964] [2020-09-16 13:54:18,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724817701] [2020-09-16 13:54:18,321 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 [2020-09-16 13:54:18,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:18,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:18,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:18,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:18,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:18,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:18,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940893634] [2020-09-16 13:54:18,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:18,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:18,490 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:18,710 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:18,711 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:18,713 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:18,713 INFO L226 Difference]: Without dead ends: 154 [2020-09-16 13:54:18,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-16 13:54:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-16 13:54:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:18,717 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:18,717 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:18,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:18,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:18,718 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:18,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:18,920 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:18,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:18,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-16 13:54:18,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:18,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304487558] [2020-09-16 13:54:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304487558] [2020-09-16 13:54:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447191437] [2020-09-16 13:54:19,001 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 [2020-09-16 13:54:19,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:19,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:19,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:19,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:19,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:19,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:19,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156430889] [2020-09-16 13:54:19,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:19,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:19,197 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:19,617 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-16 13:54:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:19,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:19,619 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:19,619 INFO L226 Difference]: Without dead ends: 171 [2020-09-16 13:54:19,619 INFO L675 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 [2020-09-16 13:54:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-16 13:54:19,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-16 13:54:19,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-16 13:54:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-16 13:54:19,624 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-16 13:54:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:19,624 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-16 13:54:19,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-16 13:54:19,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:19,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:19,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:19,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-16 13:54:19,835 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-16 13:54:19,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:19,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491309565] [2020-09-16 13:54:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:19,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491309565] [2020-09-16 13:54:19,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477735060] [2020-09-16 13:54:19,912 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 [2020-09-16 13:54:19,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:19,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:20,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:20,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:20,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264330854] [2020-09-16 13:54:20,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:20,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:20,125 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-16 13:54:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:20,410 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-16 13:54:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:20,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:20,411 INFO L225 Difference]: With dead ends: 166 [2020-09-16 13:54:20,412 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:20,412 INFO L675 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 [2020-09-16 13:54:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-16 13:54:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-16 13:54:20,416 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-16 13:54:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:20,416 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-16 13:54:20,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-16 13:54:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:20,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:20,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:20,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:20,627 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:20,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-16 13:54:20,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:20,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853797803] [2020-09-16 13:54:20,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:20,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853797803] [2020-09-16 13:54:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732280555] [2020-09-16 13:54:20,713 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:20,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:20,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:20,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:20,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:20,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874374057] [2020-09-16 13:54:20,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:20,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:20,904 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-16 13:54:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:21,077 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-16 13:54:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:21,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:21,079 INFO L225 Difference]: With dead ends: 163 [2020-09-16 13:54:21,079 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:21,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:21,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-16 13:54:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-16 13:54:21,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-16 13:54:21,083 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-16 13:54:21,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:21,083 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-16 13:54:21,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:21,084 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-16 13:54:21,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:21,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:21,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:21,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-16 13:54:21,285 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:21,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:21,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-16 13:54:21,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:21,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427634470] [2020-09-16 13:54:21,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:21,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427634470] [2020-09-16 13:54:21,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596645279] [2020-09-16 13:54:21,365 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:21,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:21,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:21,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:21,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:21,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255014325] [2020-09-16 13:54:21,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:21,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:21,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:21,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:21,527 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:21,836 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-16 13:54:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:21,837 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:21,838 INFO L225 Difference]: With dead ends: 170 [2020-09-16 13:54:21,838 INFO L226 Difference]: Without dead ends: 168 [2020-09-16 13:54:21,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:21,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-16 13:54:21,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-16 13:54:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-16 13:54:21,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-16 13:54:21,842 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-16 13:54:21,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:21,842 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-16 13:54:21,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-16 13:54:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:21,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:21,843 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:22,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:22,044 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-16 13:54:22,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:22,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001093786] [2020-09-16 13:54:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:22,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001093786] [2020-09-16 13:54:22,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752203245] [2020-09-16 13:54:22,123 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 [2020-09-16 13:54:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:22,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:22,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:22,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:22,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:22,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:22,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32675214] [2020-09-16 13:54:22,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:22,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:22,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:22,284 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-16 13:54:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:22,671 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-16 13:54:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:22,671 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:22,673 INFO L225 Difference]: With dead ends: 177 [2020-09-16 13:54:22,673 INFO L226 Difference]: Without dead ends: 172 [2020-09-16 13:54:22,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:54:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-16 13:54:22,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-16 13:54:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-16 13:54:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-16 13:54:22,679 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-16 13:54:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:22,680 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-16 13:54:22,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-16 13:54:22,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:22,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:22,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:22,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-16 13:54:22,882 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:22,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:22,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-16 13:54:22,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:22,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190262060] [2020-09-16 13:54:22,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190262060] [2020-09-16 13:54:22,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708187585] [2020-09-16 13:54:22,960 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 [2020-09-16 13:54:23,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:23,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:23,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:23,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:23,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:23,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353437630] [2020-09-16 13:54:23,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:23,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:23,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:23,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:23,091 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-16 13:54:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:23,519 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-16 13:54:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:54:23,519 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:23,520 INFO L225 Difference]: With dead ends: 190 [2020-09-16 13:54:23,521 INFO L226 Difference]: Without dead ends: 182 [2020-09-16 13:54:23,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:54:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-16 13:54:23,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-16 13:54:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-16 13:54:23,524 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-16 13:54:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:23,524 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-16 13:54:23,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-16 13:54:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:23,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:23,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:23,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-16 13:54:23,725 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:23,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-16 13:54:23,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:23,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709034091] [2020-09-16 13:54:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:23,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709034091] [2020-09-16 13:54:23,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125166572] [2020-09-16 13:54:23,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:23,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:23,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:23,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:23,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:23,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:23,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:23,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:23,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485029091] [2020-09-16 13:54:23,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:23,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:23,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:23,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:23,977 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-16 13:54:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:24,402 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-16 13:54:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:24,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:24,406 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:54:24,406 INFO L226 Difference]: Without dead ends: 175 [2020-09-16 13:54:24,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:24,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-16 13:54:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-16 13:54:24,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:24,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-16 13:54:24,409 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-16 13:54:24,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:24,410 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-16 13:54:24,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:24,410 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-16 13:54:24,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:24,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:24,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:24,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-16 13:54:24,619 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-16 13:54:24,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:24,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779484636] [2020-09-16 13:54:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:24,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779484636] [2020-09-16 13:54:24,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338750265] [2020-09-16 13:54:24,709 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 [2020-09-16 13:54:24,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:24,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:24,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:24,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:24,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:24,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249894819] [2020-09-16 13:54:24,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:24,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:24,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:24,872 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-16 13:54:25,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:25,045 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-16 13:54:25,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:25,046 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:25,048 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:25,048 INFO L226 Difference]: Without dead ends: 162 [2020-09-16 13:54:25,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:54:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-16 13:54:25,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-16 13:54:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-16 13:54:25,051 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-16 13:54:25,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:25,051 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-16 13:54:25,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:25,051 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-16 13:54:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:25,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:25,051 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:25,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-16 13:54:25,253 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:25,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:25,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-16 13:54:25,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:25,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581640077] [2020-09-16 13:54:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581640077] [2020-09-16 13:54:25,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969616159] [2020-09-16 13:54:25,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:25,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:25,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:25,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:25,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:25,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997233170] [2020-09-16 13:54:25,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:25,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:25,504 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-16 13:54:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:25,697 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-16 13:54:25,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:25,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:25,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:25,699 INFO L225 Difference]: With dead ends: 161 [2020-09-16 13:54:25,699 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:25,700 INFO L675 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 [2020-09-16 13:54:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-16 13:54:25,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-16 13:54:25,703 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-16 13:54:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:25,703 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-16 13:54:25,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-16 13:54:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:25,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:25,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:25,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-16 13:54:25,913 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:25,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:25,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-16 13:54:25,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:25,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413850465] [2020-09-16 13:54:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:25,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413850465] [2020-09-16 13:54:25,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081359744] [2020-09-16 13:54:25,986 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 [2020-09-16 13:54:26,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:26,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:26,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:26,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:26,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:26,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018026588] [2020-09-16 13:54:26,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:26,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:26,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:26,182 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-16 13:54:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:26,420 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-16 13:54:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:26,421 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:26,422 INFO L225 Difference]: With dead ends: 165 [2020-09-16 13:54:26,423 INFO L226 Difference]: Without dead ends: 163 [2020-09-16 13:54:26,423 INFO L675 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 [2020-09-16 13:54:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-16 13:54:26,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-16 13:54:26,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:26,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-16 13:54:26,427 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-16 13:54:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:26,427 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-16 13:54:26,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-16 13:54:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:26,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:26,428 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:26,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-16 13:54:26,638 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-16 13:54:26,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:26,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368829571] [2020-09-16 13:54:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368829571] [2020-09-16 13:54:26,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329424931] [2020-09-16 13:54:26,729 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 [2020-09-16 13:54:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:26,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:26,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:26,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:26,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:26,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592255223] [2020-09-16 13:54:26,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:26,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:26,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:26,910 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-16 13:54:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:27,147 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-16 13:54:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:27,148 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:27,150 INFO L225 Difference]: With dead ends: 167 [2020-09-16 13:54:27,150 INFO L226 Difference]: Without dead ends: 165 [2020-09-16 13:54:27,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-16 13:54:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-16 13:54:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-16 13:54:27,154 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-16 13:54:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:27,154 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-16 13:54:27,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-16 13:54:27,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:27,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:27,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:27,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:27,360 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:27,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-16 13:54:27,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:27,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582841638] [2020-09-16 13:54:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:27,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:27,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:27,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582841638] [2020-09-16 13:54:27,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112426454] [2020-09-16 13:54:27,447 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 [2020-09-16 13:54:27,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:27,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:27,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:27,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:27,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:27,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:27,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978893509] [2020-09-16 13:54:27,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:27,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:27,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:27,618 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:27,942 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-16 13:54:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:27,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:27,944 INFO L225 Difference]: With dead ends: 168 [2020-09-16 13:54:27,944 INFO L226 Difference]: Without dead ends: 166 [2020-09-16 13:54:27,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-16 13:54:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-16 13:54:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-16 13:54:27,948 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-16 13:54:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:27,948 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-16 13:54:27,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-16 13:54:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:27,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:27,949 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:28,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:28,152 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-16 13:54:28,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:28,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077244173] [2020-09-16 13:54:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:28,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077244173] [2020-09-16 13:54:28,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146312746] [2020-09-16 13:54:28,242 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 [2020-09-16 13:54:28,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:28,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:28,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:28,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:28,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131755107] [2020-09-16 13:54:28,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:28,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:28,400 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:28,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:28,633 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-16 13:54:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:28,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:28,636 INFO L225 Difference]: With dead ends: 160 [2020-09-16 13:54:28,636 INFO L226 Difference]: Without dead ends: 155 [2020-09-16 13:54:28,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:28,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-16 13:54:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-16 13:54:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-16 13:54:28,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-16 13:54:28,640 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-16 13:54:28,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:28,641 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-16 13:54:28,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:28,641 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-16 13:54:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:28,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:28,642 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:28,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:28,853 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-16 13:54:28,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:28,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554033420] [2020-09-16 13:54:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:28,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:28,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554033420] [2020-09-16 13:54:28,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824660754] [2020-09-16 13:54:28,932 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 [2020-09-16 13:54:28,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:29,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:29,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:29,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:29,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262728498] [2020-09-16 13:54:29,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:29,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:29,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:29,127 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-16 13:54:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:29,558 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-16 13:54:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:29,558 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:29,559 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:29,559 INFO L226 Difference]: Without dead ends: 181 [2020-09-16 13:54:29,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-16 13:54:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-16 13:54:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-16 13:54:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-16 13:54:29,565 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-16 13:54:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:29,566 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-16 13:54:29,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-16 13:54:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:29,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:29,566 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:29,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:29,776 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-16 13:54:29,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:29,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442091231] [2020-09-16 13:54:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:29,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442091231] [2020-09-16 13:54:29,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497272172] [2020-09-16 13:54:29,854 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 [2020-09-16 13:54:29,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:29,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:30,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:30,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697955891] [2020-09-16 13:54:30,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:30,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:30,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:30,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:30,024 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-16 13:54:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:30,335 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-16 13:54:30,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:54:30,336 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:30,338 INFO L225 Difference]: With dead ends: 169 [2020-09-16 13:54:30,338 INFO L226 Difference]: Without dead ends: 167 [2020-09-16 13:54:30,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-16 13:54:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-16 13:54:30,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-16 13:54:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-16 13:54:30,341 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-16 13:54:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:30,341 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-16 13:54:30,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-16 13:54:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:30,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:30,342 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:30,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-16 13:54:30,544 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-16 13:54:30,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:30,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012863510] [2020-09-16 13:54:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012863510] [2020-09-16 13:54:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350074027] [2020-09-16 13:54:30,625 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 [2020-09-16 13:54:30,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:30,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:30,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:30,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:30,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:30,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:30,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:30,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560307676] [2020-09-16 13:54:30,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:30,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:30,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:30,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:30,765 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-16 13:54:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:31,171 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-16 13:54:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:54:31,172 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:31,173 INFO L225 Difference]: With dead ends: 192 [2020-09-16 13:54:31,173 INFO L226 Difference]: Without dead ends: 184 [2020-09-16 13:54:31,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:54:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-16 13:54:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-16 13:54:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-16 13:54:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-16 13:54:31,176 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-16 13:54:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:31,176 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-16 13:54:31,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:31,177 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-16 13:54:31,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:31,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:31,178 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:31,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:31,386 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:31,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:31,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-16 13:54:31,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:31,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744667443] [2020-09-16 13:54:31,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:31,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744667443] [2020-09-16 13:54:31,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579197791] [2020-09-16 13:54:31,462 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 [2020-09-16 13:54:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:31,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-16 13:54:31,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:31,599 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:31,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:31,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-16 13:54:31,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440875590] [2020-09-16 13:54:31,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-16 13:54:31,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-16 13:54:31,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-16 13:54:31,612 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-16 13:54:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:32,022 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-16 13:54:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:32,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-16 13:54:32,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:32,024 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:54:32,024 INFO L226 Difference]: Without dead ends: 175 [2020-09-16 13:54:32,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:54:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-16 13:54:32,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-16 13:54:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-16 13:54:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-16 13:54:32,027 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-16 13:54:32,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:32,028 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-16 13:54:32,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-16 13:54:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-16 13:54:32,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:32,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:32,029 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:32,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-16 13:54:32,236 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-16 13:54:32,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:32,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602635117] [2020-09-16 13:54:32,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:32,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602635117] [2020-09-16 13:54:32,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68879709] [2020-09-16 13:54:32,334 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 [2020-09-16 13:54:32,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:32,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:32,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:32,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:32,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:32,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-16 13:54:32,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659726401] [2020-09-16 13:54:32,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 13:54:32,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:32,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 13:54:32,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:54:32,536 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-16 13:54:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:32,721 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-16 13:54:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:32,722 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-16 13:54:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:32,723 INFO L225 Difference]: With dead ends: 164 [2020-09-16 13:54:32,724 INFO L226 Difference]: Without dead ends: 159 [2020-09-16 13:54:32,724 INFO L675 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 [2020-09-16 13:54:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-16 13:54:32,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-16 13:54:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-16 13:54:32,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-16 13:54:32,728 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-16 13:54:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:32,728 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-16 13:54:32,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 13:54:32,729 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-16 13:54:32,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:32,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:32,729 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:32,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:32,931 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:32,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-16 13:54:32,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:32,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031698961] [2020-09-16 13:54:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031698961] [2020-09-16 13:54:33,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351000515] [2020-09-16 13:54:33,083 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 [2020-09-16 13:54:33,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:33,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:33,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:33,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:33,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396207839] [2020-09-16 13:54:33,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:33,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:33,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:33,277 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-16 13:54:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:33,329 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-16 13:54:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:33,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:33,331 INFO L225 Difference]: With dead ends: 156 [2020-09-16 13:54:33,331 INFO L226 Difference]: Without dead ends: 153 [2020-09-16 13:54:33,331 INFO L675 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 [2020-09-16 13:54:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-16 13:54:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-16 13:54:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-16 13:54:33,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-16 13:54:33,335 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-16 13:54:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:33,335 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-16 13:54:33,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-16 13:54:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:33,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:33,336 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:33,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-16 13:54:33,545 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:33,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-16 13:54:33,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:33,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858093170] [2020-09-16 13:54:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858093170] [2020-09-16 13:54:33,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183375096] [2020-09-16 13:54:33,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:33,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:33,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:33,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:33,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:33,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:33,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:33,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243229055] [2020-09-16 13:54:33,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:33,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:33,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:33,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:33,879 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-16 13:54:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:33,952 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-16 13:54:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:33,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:33,955 INFO L225 Difference]: With dead ends: 170 [2020-09-16 13:54:33,955 INFO L226 Difference]: Without dead ends: 167 [2020-09-16 13:54:33,955 INFO L675 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 [2020-09-16 13:54:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-16 13:54:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-16 13:54:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-16 13:54:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-16 13:54:33,960 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-16 13:54:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:33,962 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-16 13:54:33,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-16 13:54:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:33,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:33,962 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:34,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,173 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-16 13:54:34,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:34,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117478622] [2020-09-16 13:54:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117478622] [2020-09-16 13:54:34,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074667931] [2020-09-16 13:54:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:34,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:34,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342838480] [2020-09-16 13:54:34,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:34,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:34,470 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-16 13:54:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:34,580 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-16 13:54:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:34,580 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:34,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:34,582 INFO L225 Difference]: With dead ends: 169 [2020-09-16 13:54:34,582 INFO L226 Difference]: Without dead ends: 166 [2020-09-16 13:54:34,582 INFO L675 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 [2020-09-16 13:54:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-16 13:54:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-16 13:54:34,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-16 13:54:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-16 13:54:34,585 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-16 13:54:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:34,585 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-16 13:54:34,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-16 13:54:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:34,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:34,586 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:34,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:34,795 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-16 13:54:34,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:34,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751149296] [2020-09-16 13:54:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:34,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751149296] [2020-09-16 13:54:34,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452503290] [2020-09-16 13:54:34,897 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 [2020-09-16 13:54:34,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:54:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:34,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:35,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:35,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684189435] [2020-09-16 13:54:35,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:35,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:35,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:35,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:35,104 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-16 13:54:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:35,231 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-16 13:54:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:35,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:35,233 INFO L225 Difference]: With dead ends: 168 [2020-09-16 13:54:35,233 INFO L226 Difference]: Without dead ends: 165 [2020-09-16 13:54:35,234 INFO L675 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 [2020-09-16 13:54:35,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-16 13:54:35,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-16 13:54:35,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-16 13:54:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-16 13:54:35,237 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-16 13:54:35,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:35,237 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-16 13:54:35,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-16 13:54:35,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:35,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:35,238 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:35,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-16 13:54:35,447 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:35,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-16 13:54:35,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:35,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921335392] [2020-09-16 13:54:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921335392] [2020-09-16 13:54:35,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820433665] [2020-09-16 13:54:35,565 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 [2020-09-16 13:54:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:35,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:35,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:35,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876927011] [2020-09-16 13:54:35,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:35,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:35,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:35,762 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-16 13:54:35,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:35,929 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-16 13:54:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:35,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:35,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:35,931 INFO L225 Difference]: With dead ends: 167 [2020-09-16 13:54:35,931 INFO L226 Difference]: Without dead ends: 164 [2020-09-16 13:54:35,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-16 13:54:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-16 13:54:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-16 13:54:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-16 13:54:35,935 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-16 13:54:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:35,936 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-16 13:54:35,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-16 13:54:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-16 13:54:35,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:35,936 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:36,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:36,144 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:36,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-16 13:54:36,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:36,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984342708] [2020-09-16 13:54:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:36,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984342708] [2020-09-16 13:54:36,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844522667] [2020-09-16 13:54:36,260 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 [2020-09-16 13:54:36,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:36,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:36,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:36,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:36,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:36,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244227238] [2020-09-16 13:54:36,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:36,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:36,461 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-16 13:54:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:36,703 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-16 13:54:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:36,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-16 13:54:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:36,706 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:36,706 INFO L226 Difference]: Without dead ends: 170 [2020-09-16 13:54:36,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-16 13:54:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-16 13:54:36,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-16 13:54:36,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-16 13:54:36,711 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-16 13:54:36,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:36,712 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-16 13:54:36,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:36,712 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-16 13:54:36,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:36,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:36,713 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:36,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:36,925 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:36,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:36,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-16 13:54:36,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:36,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353964013] [2020-09-16 13:54:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353964013] [2020-09-16 13:54:37,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705669849] [2020-09-16 13:54:37,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:37,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:37,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:37,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:37,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:37,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216071605] [2020-09-16 13:54:37,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:37,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:37,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:37,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:37,319 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-16 13:54:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:37,395 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-16 13:54:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-16 13:54:37,396 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:37,397 INFO L225 Difference]: With dead ends: 163 [2020-09-16 13:54:37,397 INFO L226 Difference]: Without dead ends: 161 [2020-09-16 13:54:37,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:37,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-16 13:54:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-16 13:54:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-16 13:54:37,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-16 13:54:37,401 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-16 13:54:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:37,401 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-16 13:54:37,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-16 13:54:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:37,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:37,402 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:37,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-16 13:54:37,612 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-16 13:54:37,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:37,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71178555] [2020-09-16 13:54:37,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71178555] [2020-09-16 13:54:37,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244314221] [2020-09-16 13:54:37,718 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 [2020-09-16 13:54:37,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:37,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:37,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597604623] [2020-09-16 13:54:37,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:37,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:37,902 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:38,081 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-16 13:54:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:38,082 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:38,084 INFO L225 Difference]: With dead ends: 172 [2020-09-16 13:54:38,084 INFO L226 Difference]: Without dead ends: 170 [2020-09-16 13:54:38,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-16 13:54:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-16 13:54:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-16 13:54:38,087 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-16 13:54:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:38,088 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-16 13:54:38,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:38,088 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-16 13:54:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:38,088 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:38,088 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:38,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:38,289 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:38,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:38,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-16 13:54:38,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:38,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305159613] [2020-09-16 13:54:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:38,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305159613] [2020-09-16 13:54:38,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259117444] [2020-09-16 13:54:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:38,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:38,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:38,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:38,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:38,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28763785] [2020-09-16 13:54:38,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:38,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:38,640 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-16 13:54:38,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:38,885 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-16 13:54:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:38,886 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:38,888 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:38,888 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:38,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-16 13:54:38,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-16 13:54:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-16 13:54:38,892 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-16 13:54:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:38,893 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-16 13:54:38,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-16 13:54:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:38,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:38,894 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:39,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-16 13:54:39,105 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-16 13:54:39,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:39,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698766655] [2020-09-16 13:54:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:39,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698766655] [2020-09-16 13:54:39,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934570923] [2020-09-16 13:54:39,224 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 [2020-09-16 13:54:39,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:39,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:39,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:39,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:39,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:39,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:39,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053922026] [2020-09-16 13:54:39,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:39,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:39,462 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-16 13:54:39,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:39,674 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-16 13:54:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:39,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:39,676 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:39,676 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:39,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:39,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-16 13:54:39,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:39,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-16 13:54:39,680 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-16 13:54:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:39,680 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-16 13:54:39,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:39,680 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-16 13:54:39,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:39,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:39,682 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:39,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-16 13:54:39,893 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:39,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:39,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-16 13:54:39,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:39,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285932936] [2020-09-16 13:54:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285932936] [2020-09-16 13:54:40,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659719117] [2020-09-16 13:54:40,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:40,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:40,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:40,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:40,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:40,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239215485] [2020-09-16 13:54:40,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:40,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:40,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:40,193 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-16 13:54:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:40,448 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-16 13:54:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:40,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:40,450 INFO L225 Difference]: With dead ends: 184 [2020-09-16 13:54:40,450 INFO L226 Difference]: Without dead ends: 182 [2020-09-16 13:54:40,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-16 13:54:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-16 13:54:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:54:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-16 13:54:40,454 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-16 13:54:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:40,455 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-16 13:54:40,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-16 13:54:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:40,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:40,455 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:40,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-16 13:54:40,656 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:40,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-16 13:54:40,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:40,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532729532] [2020-09-16 13:54:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532729532] [2020-09-16 13:54:40,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791426158] [2020-09-16 13:54:40,777 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 [2020-09-16 13:54:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:40,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:40,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:40,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:40,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351414021] [2020-09-16 13:54:40,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:40,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:40,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:40,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:40,981 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-16 13:54:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:41,250 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-16 13:54:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:41,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:41,252 INFO L225 Difference]: With dead ends: 179 [2020-09-16 13:54:41,253 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:54:41,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:54:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-16 13:54:41,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-16 13:54:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-16 13:54:41,257 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-16 13:54:41,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:41,257 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-16 13:54:41,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:41,257 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-16 13:54:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:41,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:41,258 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:41,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:41,465 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:41,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-16 13:54:41,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:41,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248850420] [2020-09-16 13:54:41,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:41,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248850420] [2020-09-16 13:54:41,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045525510] [2020-09-16 13:54:41,584 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 [2020-09-16 13:54:41,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:41,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:41,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:41,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:41,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:41,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039227114] [2020-09-16 13:54:41,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:41,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:41,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:41,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:41,777 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-16 13:54:41,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:41,980 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-16 13:54:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:41,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:41,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:41,982 INFO L225 Difference]: With dead ends: 176 [2020-09-16 13:54:41,982 INFO L226 Difference]: Without dead ends: 174 [2020-09-16 13:54:41,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:54:41,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-16 13:54:41,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-16 13:54:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:54:41,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-16 13:54:41,986 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-16 13:54:41,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:41,987 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-16 13:54:41,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:41,987 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-16 13:54:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:41,987 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:41,988 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:42,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:42,197 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-16 13:54:42,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:42,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273853165] [2020-09-16 13:54:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:42,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273853165] [2020-09-16 13:54:42,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381188419] [2020-09-16 13:54:42,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:42,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:54:42,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:42,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:42,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:42,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:42,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:42,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738535950] [2020-09-16 13:54:42,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:42,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:42,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:42,524 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:42,808 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-16 13:54:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:42,809 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:42,810 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:42,811 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:42,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-16 13:54:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-16 13:54:42,817 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-16 13:54:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:42,817 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-16 13:54:42,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-16 13:54:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:42,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:42,818 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:43,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,020 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-16 13:54:43,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:43,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845509163] [2020-09-16 13:54:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:43,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845509163] [2020-09-16 13:54:43,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283023177] [2020-09-16 13:54:43,147 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 [2020-09-16 13:54:43,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:43,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:43,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:43,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:43,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415650033] [2020-09-16 13:54:43,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:43,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:43,336 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-16 13:54:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:43,579 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-16 13:54:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:43,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:43,581 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:43,581 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:43,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-16 13:54:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-16 13:54:43,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-16 13:54:43,584 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-16 13:54:43,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:43,585 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-16 13:54:43,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:43,585 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-16 13:54:43,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:43,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:43,586 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:43,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,794 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:43,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:43,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-16 13:54:43,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:43,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350075176] [2020-09-16 13:54:43,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350075176] [2020-09-16 13:54:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571170250] [2020-09-16 13:54:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:43,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:43,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:44,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:44,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:44,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841772299] [2020-09-16 13:54:44,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:44,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:44,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:44,140 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-16 13:54:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:44,222 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-16 13:54:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:54:44,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:44,225 INFO L225 Difference]: With dead ends: 182 [2020-09-16 13:54:44,225 INFO L226 Difference]: Without dead ends: 180 [2020-09-16 13:54:44,225 INFO L675 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 [2020-09-16 13:54:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-16 13:54:44,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-16 13:54:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:54:44,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-16 13:54:44,229 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-16 13:54:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:44,230 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-16 13:54:44,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:44,230 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-16 13:54:44,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:44,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:44,230 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:44,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-16 13:54:44,442 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-16 13:54:44,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:44,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393656784] [2020-09-16 13:54:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:44,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393656784] [2020-09-16 13:54:44,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537844873] [2020-09-16 13:54:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:44,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:44,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:44,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:44,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448360105] [2020-09-16 13:54:44,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:44,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:44,785 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-16 13:54:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:45,003 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-16 13:54:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:45,004 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:45,006 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:54:45,006 INFO L226 Difference]: Without dead ends: 183 [2020-09-16 13:54:45,006 INFO L675 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 [2020-09-16 13:54:45,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-16 13:54:45,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-16 13:54:45,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-16 13:54:45,010 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-16 13:54:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:45,011 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-16 13:54:45,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:45,011 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-16 13:54:45,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:45,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:45,011 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:45,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:45,212 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-16 13:54:45,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:45,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99299586] [2020-09-16 13:54:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:45,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99299586] [2020-09-16 13:54:45,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521686730] [2020-09-16 13:54:45,337 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 [2020-09-16 13:54:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:45,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:45,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:45,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806339081] [2020-09-16 13:54:45,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:45,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:45,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:45,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:45,572 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:45,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:45,837 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-16 13:54:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:45,838 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:45,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:45,840 INFO L225 Difference]: With dead ends: 191 [2020-09-16 13:54:45,840 INFO L226 Difference]: Without dead ends: 189 [2020-09-16 13:54:45,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:54:45,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-16 13:54:45,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-16 13:54:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:45,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-16 13:54:45,844 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-16 13:54:45,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:45,844 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-16 13:54:45,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:45,844 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-16 13:54:45,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:45,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:45,845 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:46,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:46,047 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:46,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:46,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-16 13:54:46,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:46,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194612189] [2020-09-16 13:54:46,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:46,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194612189] [2020-09-16 13:54:46,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536514150] [2020-09-16 13:54:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:46,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:46,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:46,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:46,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:46,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508523607] [2020-09-16 13:54:46,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:46,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:46,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:46,379 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-16 13:54:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:46,672 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-16 13:54:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:46,673 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:46,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:46,675 INFO L225 Difference]: With dead ends: 187 [2020-09-16 13:54:46,675 INFO L226 Difference]: Without dead ends: 185 [2020-09-16 13:54:46,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-16 13:54:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-16 13:54:46,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-16 13:54:46,680 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-16 13:54:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:46,680 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-16 13:54:46,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-16 13:54:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:46,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:46,681 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:46,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-16 13:54:46,886 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-16 13:54:46,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:46,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026983535] [2020-09-16 13:54:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026983535] [2020-09-16 13:54:47,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121321537] [2020-09-16 13:54:47,002 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 [2020-09-16 13:54:47,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:47,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:47,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:47,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:47,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572481124] [2020-09-16 13:54:47,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:47,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:47,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:47,197 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:47,506 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-16 13:54:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:47,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:47,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:47,508 INFO L225 Difference]: With dead ends: 198 [2020-09-16 13:54:47,508 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:54:47,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:54:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-16 13:54:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-16 13:54:47,512 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-16 13:54:47,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:47,512 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-16 13:54:47,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-16 13:54:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:47,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:47,513 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:47,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:47,718 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-16 13:54:47,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:47,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939073530] [2020-09-16 13:54:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:47,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939073530] [2020-09-16 13:54:47,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049280811] [2020-09-16 13:54:47,836 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 [2020-09-16 13:54:47,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:47,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:47,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:47,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:48,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967445402] [2020-09-16 13:54:48,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:48,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:48,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:48,038 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-16 13:54:48,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:48,376 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-16 13:54:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:48,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:48,378 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:48,378 INFO L226 Difference]: Without dead ends: 187 [2020-09-16 13:54:48,379 INFO L675 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 [2020-09-16 13:54:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-16 13:54:48,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-16 13:54:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:54:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-16 13:54:48,382 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-16 13:54:48,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:48,382 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-16 13:54:48,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-16 13:54:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:48,383 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:48,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-16 13:54:48,584 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:48,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-16 13:54:48,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:48,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906649988] [2020-09-16 13:54:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906649988] [2020-09-16 13:54:48,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622814634] [2020-09-16 13:54:48,739 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 [2020-09-16 13:54:48,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:48,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:48,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:48,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:48,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198538726] [2020-09-16 13:54:48,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:48,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:48,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:48,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:48,936 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-16 13:54:49,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:49,050 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-16 13:54:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:54:49,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:49,052 INFO L225 Difference]: With dead ends: 178 [2020-09-16 13:54:49,052 INFO L226 Difference]: Without dead ends: 176 [2020-09-16 13:54:49,052 INFO L675 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 [2020-09-16 13:54:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-16 13:54:49,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-16 13:54:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-16 13:54:49,055 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-16 13:54:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:49,056 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-16 13:54:49,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-16 13:54:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:49,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:49,056 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:49,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:49,257 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-16 13:54:49,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:49,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107427348] [2020-09-16 13:54:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:49,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107427348] [2020-09-16 13:54:49,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914294749] [2020-09-16 13:54:49,384 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 [2020-09-16 13:54:49,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:49,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:49,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:49,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:49,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:49,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735722656] [2020-09-16 13:54:49,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:49,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:49,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:49,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:49,585 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-16 13:54:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:49,820 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-16 13:54:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:49,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:49,822 INFO L225 Difference]: With dead ends: 193 [2020-09-16 13:54:49,822 INFO L226 Difference]: Without dead ends: 191 [2020-09-16 13:54:49,823 INFO L675 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 [2020-09-16 13:54:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-16 13:54:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-16 13:54:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-16 13:54:49,826 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-16 13:54:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:49,826 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-16 13:54:49,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-16 13:54:49,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:49,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:49,827 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:50,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-16 13:54:50,028 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:50,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:50,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-16 13:54:50,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:50,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743883886] [2020-09-16 13:54:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:50,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743883886] [2020-09-16 13:54:50,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487469730] [2020-09-16 13:54:50,129 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 [2020-09-16 13:54:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:50,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:50,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:50,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703117217] [2020-09-16 13:54:50,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:50,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:50,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:50,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:50,885 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-16 13:54:51,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:51,193 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-16 13:54:51,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:51,194 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:51,195 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:54:51,195 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:54:51,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:54:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:54:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-16 13:54:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:54:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-16 13:54:51,199 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-16 13:54:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:51,200 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-16 13:54:51,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-16 13:54:51,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:51,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:51,201 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:51,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:51,409 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:51,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:51,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-16 13:54:51,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:51,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324331215] [2020-09-16 13:54:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:51,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324331215] [2020-09-16 13:54:51,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40630447] [2020-09-16 13:54:51,542 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 [2020-09-16 13:54:51,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:51,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:51,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:51,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779512728] [2020-09-16 13:54:51,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:51,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:51,721 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-16 13:54:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:51,855 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-16 13:54:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:54:51,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:51,857 INFO L225 Difference]: With dead ends: 174 [2020-09-16 13:54:51,857 INFO L226 Difference]: Without dead ends: 172 [2020-09-16 13:54:51,857 INFO L675 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 [2020-09-16 13:54:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-16 13:54:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-16 13:54:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:54:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-16 13:54:51,861 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-16 13:54:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:51,861 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-16 13:54:51,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-16 13:54:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:51,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:51,862 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:52,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-16 13:54:52,062 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:52,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-16 13:54:52,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:52,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788264691] [2020-09-16 13:54:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788264691] [2020-09-16 13:54:52,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133722578] [2020-09-16 13:54:52,165 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 [2020-09-16 13:54:52,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:52,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:52,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:52,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:52,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:52,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017233251] [2020-09-16 13:54:52,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:52,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:52,369 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-16 13:54:52,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:52,650 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-16 13:54:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:54:52,650 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:52,651 INFO L225 Difference]: With dead ends: 189 [2020-09-16 13:54:52,651 INFO L226 Difference]: Without dead ends: 187 [2020-09-16 13:54:52,652 INFO L675 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 [2020-09-16 13:54:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-16 13:54:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-16 13:54:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-16 13:54:52,655 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-16 13:54:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:52,655 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-16 13:54:52,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-16 13:54:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:52,656 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:52,656 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:52,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:52,857 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-16 13:54:52,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:52,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069682746] [2020-09-16 13:54:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:52,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069682746] [2020-09-16 13:54:52,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400277355] [2020-09-16 13:54:52,972 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 [2020-09-16 13:54:53,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:53,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:53,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:53,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:53,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:53,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744150651] [2020-09-16 13:54:53,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:53,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:53,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:53,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:53,168 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-16 13:54:53,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:53,332 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-16 13:54:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:54:53,333 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:53,334 INFO L225 Difference]: With dead ends: 175 [2020-09-16 13:54:53,334 INFO L226 Difference]: Without dead ends: 173 [2020-09-16 13:54:53,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:54:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-16 13:54:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-16 13:54:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:53,338 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:53,338 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:53,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:53,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:53,339 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:53,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:53,542 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:53,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-16 13:54:53,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:53,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072939162] [2020-09-16 13:54:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:53,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072939162] [2020-09-16 13:54:53,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201177977] [2020-09-16 13:54:53,656 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 [2020-09-16 13:54:53,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:54:53,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:53,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:53,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:53,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:53,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:53,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:53,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823102841] [2020-09-16 13:54:53,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:53,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:53,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:53,871 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:54,262 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-16 13:54:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:54,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:54,265 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:54:54,265 INFO L226 Difference]: Without dead ends: 190 [2020-09-16 13:54:54,265 INFO L675 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 [2020-09-16 13:54:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-16 13:54:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-16 13:54:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:54,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-16 13:54:54,268 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-16 13:54:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:54,268 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-16 13:54:54,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-16 13:54:54,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:54,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:54,269 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:54,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:54,470 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-16 13:54:54,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:54,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035897708] [2020-09-16 13:54:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035897708] [2020-09-16 13:54:54,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746517967] [2020-09-16 13:54:54,558 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:54,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:54:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:54,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:54,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:54,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810896921] [2020-09-16 13:54:54,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:54,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:54,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:54,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:54,770 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-16 13:54:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:55,091 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-16 13:54:55,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:54:55,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:55,094 INFO L225 Difference]: With dead ends: 187 [2020-09-16 13:54:55,094 INFO L226 Difference]: Without dead ends: 185 [2020-09-16 13:54:55,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-16 13:54:55,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-16 13:54:55,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:55,098 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:55,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:55,098 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:55,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:55,098 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:55,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:55,099 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:55,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:55,299 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:55,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-16 13:54:55,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:55,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893274267] [2020-09-16 13:54:55,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:55,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:55,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893274267] [2020-09-16 13:54:55,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669123056] [2020-09-16 13:54:55,408 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 [2020-09-16 13:54:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:55,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:55,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:55,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:54:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:55,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:55,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:55,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205140929] [2020-09-16 13:54:55,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:55,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:55,641 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:56,182 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-16 13:54:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:54:56,183 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:56,185 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:54:56,185 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:54:56,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:54:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:54:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-16 13:54:56,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:54:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:54:56,190 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:54:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:56,190 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:54:56,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:54:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:56,191 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:56,191 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:56,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-16 13:54:56,398 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-16 13:54:56,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:56,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782836588] [2020-09-16 13:54:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:56,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782836588] [2020-09-16 13:54:56,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501047401] [2020-09-16 13:54:56,508 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 [2020-09-16 13:54:56,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:54:56,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:56,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:56,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:54:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:56,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:56,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:56,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565249284] [2020-09-16 13:54:56,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:56,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:56,714 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:54:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:57,105 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-16 13:54:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:57,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:57,107 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:54:57,107 INFO L226 Difference]: Without dead ends: 197 [2020-09-16 13:54:57,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:54:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-16 13:54:57,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-16 13:54:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:54:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-16 13:54:57,111 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-16 13:54:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:57,111 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-16 13:54:57,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-16 13:54:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:57,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:57,112 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:57,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:57,320 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:57,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:57,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-16 13:54:57,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:57,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833154024] [2020-09-16 13:54:57,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:57,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833154024] [2020-09-16 13:54:57,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213462451] [2020-09-16 13:54:57,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:57,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:54:57,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:57,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:58,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:58,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:58,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324560746] [2020-09-16 13:54:58,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:58,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:58,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:58,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:58,648 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-16 13:54:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:54:59,002 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-16 13:54:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:54:59,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:54:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:54:59,004 INFO L225 Difference]: With dead ends: 198 [2020-09-16 13:54:59,005 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:54:59,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:54:59,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:54:59,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-16 13:54:59,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:54:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-16 13:54:59,008 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-16 13:54:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:54:59,009 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-16 13:54:59,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:54:59,009 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-16 13:54:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:54:59,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:54:59,010 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:54:59,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-16 13:54:59,215 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:54:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:54:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-16 13:54:59,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:54:59,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580101046] [2020-09-16 13:54:59,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:54:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:54:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:59,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580101046] [2020-09-16 13:54:59,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354593263] [2020-09-16 13:54:59,308 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:54:59,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:54:59,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:54:59,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:54:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:54:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:54:59,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:54:59,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:54:59,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140836545] [2020-09-16 13:54:59,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:54:59,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:54:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:54:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:54:59,537 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-16 13:55:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:00,030 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-16 13:55:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:55:00,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:00,033 INFO L225 Difference]: With dead ends: 209 [2020-09-16 13:55:00,033 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:55:00,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:55:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:55:00,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-16 13:55:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:55:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-16 13:55:00,037 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-16 13:55:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:00,038 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-16 13:55:00,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-16 13:55:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:00,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:00,038 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:00,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-16 13:55:00,239 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:00,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:00,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-16 13:55:00,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:00,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706161300] [2020-09-16 13:55:00,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:00,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706161300] [2020-09-16 13:55:00,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732569241] [2020-09-16 13:55:00,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:00,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:55:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:00,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:00,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:00,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:00,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:00,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46187315] [2020-09-16 13:55:00,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:00,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:00,587 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-16 13:55:01,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:01,250 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-16 13:55:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:01,251 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:01,253 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:55:01,253 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:55:01,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:55:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:55:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-16 13:55:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 13:55:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-16 13:55:01,257 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-16 13:55:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:01,258 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-16 13:55:01,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-16 13:55:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:01,259 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:01,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-16 13:55:01,464 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-16 13:55:01,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:01,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220120453] [2020-09-16 13:55:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:01,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:01,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220120453] [2020-09-16 13:55:01,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041152740] [2020-09-16 13:55:01,574 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 [2020-09-16 13:55:01,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:01,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:01,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:01,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:03,825 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:03,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:03,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:03,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288639867] [2020-09-16 13:55:03,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:03,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-16 13:55:03,877 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-16 13:55:08,212 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 13:55:12,465 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-16 13:55:12,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:12,971 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-16 13:55:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:55:12,972 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:12,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:12,974 INFO L225 Difference]: With dead ends: 236 [2020-09-16 13:55:12,974 INFO L226 Difference]: Without dead ends: 228 [2020-09-16 13:55:12,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-16 13:55:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-16 13:55:12,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-16 13:55:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:55:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-16 13:55:12,978 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-16 13:55:12,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:12,978 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-16 13:55:12,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-16 13:55:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:12,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:12,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:13,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-16 13:55:13,188 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-16 13:55:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:13,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940113457] [2020-09-16 13:55:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:13,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:13,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940113457] [2020-09-16 13:55:13,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196453531] [2020-09-16 13:55:13,298 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 [2020-09-16 13:55:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:13,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:13,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:13,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:13,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:13,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297442307] [2020-09-16 13:55:13,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:13,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:13,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:13,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:13,545 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-16 13:55:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:14,203 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-16 13:55:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:14,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:14,205 INFO L225 Difference]: With dead ends: 219 [2020-09-16 13:55:14,205 INFO L226 Difference]: Without dead ends: 214 [2020-09-16 13:55:14,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:55:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-16 13:55:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-16 13:55:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:55:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-16 13:55:14,209 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-16 13:55:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:14,210 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-16 13:55:14,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-16 13:55:14,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:14,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:14,211 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:14,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:14,414 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:14,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:14,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-16 13:55:14,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:14,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313370972] [2020-09-16 13:55:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:14,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313370972] [2020-09-16 13:55:14,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923925174] [2020-09-16 13:55:14,523 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 [2020-09-16 13:55:14,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:14,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:14,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:14,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775845825] [2020-09-16 13:55:14,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:14,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:14,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:14,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:14,729 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-16 13:55:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:15,058 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-16 13:55:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:15,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:15,060 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:55:15,060 INFO L226 Difference]: Without dead ends: 195 [2020-09-16 13:55:15,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:15,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-16 13:55:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-16 13:55:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-16 13:55:15,064 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-16 13:55:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:15,064 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-16 13:55:15,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:15,065 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-16 13:55:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:15,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:15,065 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:15,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:15,268 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-16 13:55:15,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:15,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718021062] [2020-09-16 13:55:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:15,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718021062] [2020-09-16 13:55:15,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555537091] [2020-09-16 13:55:15,377 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 [2020-09-16 13:55:15,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:55:15,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:15,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:15,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:15,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532271463] [2020-09-16 13:55:15,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:15,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:15,571 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-16 13:55:15,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:15,906 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-16 13:55:15,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:15,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:15,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:15,908 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:55:15,908 INFO L226 Difference]: Without dead ends: 200 [2020-09-16 13:55:15,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:15,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-16 13:55:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-16 13:55:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-16 13:55:15,911 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-16 13:55:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:15,911 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-16 13:55:15,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:15,911 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-16 13:55:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:15,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:15,912 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:16,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-16 13:55:16,113 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-16 13:55:16,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:16,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36864463] [2020-09-16 13:55:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36864463] [2020-09-16 13:55:16,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644034555] [2020-09-16 13:55:16,224 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 [2020-09-16 13:55:16,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:55:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:16,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:16,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:16,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:16,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:16,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040196104] [2020-09-16 13:55:16,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:16,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:16,443 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-16 13:55:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:16,797 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-16 13:55:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:55:16,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:16,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:16,799 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:55:16,799 INFO L226 Difference]: Without dead ends: 195 [2020-09-16 13:55:16,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-16 13:55:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-16 13:55:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-16 13:55:16,803 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-16 13:55:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:16,803 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-16 13:55:16,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-16 13:55:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:16,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:16,804 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:17,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-16 13:55:17,005 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:17,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-16 13:55:17,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:17,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212993410] [2020-09-16 13:55:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212993410] [2020-09-16 13:55:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884146806] [2020-09-16 13:55:17,102 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 [2020-09-16 13:55:17,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:17,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:17,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:17,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:17,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456828452] [2020-09-16 13:55:17,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:17,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:17,358 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-16 13:55:17,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:17,992 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-16 13:55:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:55:17,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:17,994 INFO L225 Difference]: With dead ends: 214 [2020-09-16 13:55:17,994 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:55:17,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:55:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-16 13:55:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:55:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-16 13:55:18,000 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-16 13:55:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:18,001 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-16 13:55:18,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-16 13:55:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:18,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:18,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:18,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-16 13:55:18,215 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:18,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-16 13:55:18,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:18,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188943280] [2020-09-16 13:55:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:18,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188943280] [2020-09-16 13:55:18,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420761828] [2020-09-16 13:55:18,375 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 [2020-09-16 13:55:18,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:18,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:18,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:18,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:18,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641387047] [2020-09-16 13:55:18,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:18,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:18,636 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-16 13:55:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:19,098 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-16 13:55:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:19,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:19,100 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:55:19,100 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:55:19,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:55:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:55:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-16 13:55:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:55:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-16 13:55:19,104 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-16 13:55:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:19,104 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-16 13:55:19,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-16 13:55:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:19,105 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:19,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:19,315 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:19,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-16 13:55:19,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:19,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256109214] [2020-09-16 13:55:19,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:19,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:19,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256109214] [2020-09-16 13:55:19,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242694849] [2020-09-16 13:55:19,448 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 [2020-09-16 13:55:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:19,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:19,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:19,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105133211] [2020-09-16 13:55:19,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:19,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:19,705 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-16 13:55:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:20,351 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-16 13:55:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:55:20,352 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:20,353 INFO L225 Difference]: With dead ends: 211 [2020-09-16 13:55:20,353 INFO L226 Difference]: Without dead ends: 209 [2020-09-16 13:55:20,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-16 13:55:20,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-16 13:55:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:20,362 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:20,362 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:20,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:20,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:20,363 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:20,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:20,577 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-16 13:55:20,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:20,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135366222] [2020-09-16 13:55:20,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:20,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135366222] [2020-09-16 13:55:20,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952530245] [2020-09-16 13:55:20,682 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 [2020-09-16 13:55:20,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:20,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:20,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:20,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:20,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:20,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:20,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574343076] [2020-09-16 13:55:20,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:20,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:20,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:20,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:20,874 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:21,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:21,482 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-16 13:55:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:55:21,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:21,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:21,484 INFO L225 Difference]: With dead ends: 211 [2020-09-16 13:55:21,484 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:55:21,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:55:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:55:21,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-16 13:55:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:21,487 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:21,488 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:21,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:21,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:21,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:21,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:21,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-16 13:55:21,690 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:21,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-16 13:55:21,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:21,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525022810] [2020-09-16 13:55:21,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:21,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525022810] [2020-09-16 13:55:21,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166545396] [2020-09-16 13:55:21,802 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 [2020-09-16 13:55:21,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:55:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:21,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:21,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:22,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:22,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:22,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561149400] [2020-09-16 13:55:22,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:22,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:22,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:22,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:22,027 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:22,776 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-16 13:55:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:55:22,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:22,778 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:55:22,778 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 13:55:22,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:55:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 13:55:22,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-16 13:55:22,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-16 13:55:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-16 13:55:22,781 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-16 13:55:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:22,781 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-16 13:55:22,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-16 13:55:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:22,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:22,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:22,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-16 13:55:22,983 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-16 13:55:22,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:22,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633375089] [2020-09-16 13:55:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:23,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633375089] [2020-09-16 13:55:23,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426101540] [2020-09-16 13:55:23,099 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 [2020-09-16 13:55:23,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:55:23,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:23,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:23,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:23,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590339959] [2020-09-16 13:55:23,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:23,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:23,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:23,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:23,312 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-16 13:55:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:23,920 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-16 13:55:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:55:23,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:23,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:23,922 INFO L225 Difference]: With dead ends: 221 [2020-09-16 13:55:23,922 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 13:55:23,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:55:23,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 13:55:23,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-16 13:55:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-16 13:55:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-16 13:55:23,926 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-16 13:55:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:23,927 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-16 13:55:23,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-16 13:55:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:23,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:23,927 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:24,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:24,128 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:24,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:24,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-16 13:55:24,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:24,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762221878] [2020-09-16 13:55:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:24,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762221878] [2020-09-16 13:55:24,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455999008] [2020-09-16 13:55:24,250 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 [2020-09-16 13:55:24,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:55:24,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:24,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:24,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:55:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:24,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:24,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:24,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725892839] [2020-09-16 13:55:24,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:24,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:24,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:24,438 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-16 13:55:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:25,194 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-16 13:55:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:55:25,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:25,196 INFO L225 Difference]: With dead ends: 240 [2020-09-16 13:55:25,196 INFO L226 Difference]: Without dead ends: 232 [2020-09-16 13:55:25,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:55:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-16 13:55:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-16 13:55:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:55:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-16 13:55:25,199 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-16 13:55:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:25,200 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-16 13:55:25,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-16 13:55:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:25,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:25,200 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:25,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-16 13:55:25,401 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-16 13:55:25,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:25,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637549001] [2020-09-16 13:55:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:25,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637549001] [2020-09-16 13:55:25,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045317869] [2020-09-16 13:55:25,504 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 [2020-09-16 13:55:25,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:55:25,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:25,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:25,703 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:25,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:25,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:25,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701181096] [2020-09-16 13:55:25,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:25,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:25,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:25,725 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-16 13:55:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:26,660 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-16 13:55:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:55:26,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:26,663 INFO L225 Difference]: With dead ends: 238 [2020-09-16 13:55:26,663 INFO L226 Difference]: Without dead ends: 230 [2020-09-16 13:55:26,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:55:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-16 13:55:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-16 13:55:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-16 13:55:26,669 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-16 13:55:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:26,670 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-16 13:55:26,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-16 13:55:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:26,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:26,671 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:26,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:26,884 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:26,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-16 13:55:26,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:26,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397488257] [2020-09-16 13:55:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:26,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397488257] [2020-09-16 13:55:26,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137876323] [2020-09-16 13:55:26,985 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 [2020-09-16 13:55:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:27,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:27,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:27,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:27,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:27,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283960048] [2020-09-16 13:55:27,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:27,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:27,200 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-16 13:55:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:27,539 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-16 13:55:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:55:27,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:27,541 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:55:27,542 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:55:27,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:55:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:55:27,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-16 13:55:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:55:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-16 13:55:27,546 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-16 13:55:27,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:27,546 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-16 13:55:27,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-16 13:55:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:27,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:27,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:27,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-16 13:55:27,751 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:27,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-16 13:55:27,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:27,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273049822] [2020-09-16 13:55:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:27,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273049822] [2020-09-16 13:55:27,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310871616] [2020-09-16 13:55:27,868 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 [2020-09-16 13:55:27,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:55:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:28,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:28,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:55:28,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983254733] [2020-09-16 13:55:28,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:55:28,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:28,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:55:28,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:55:28,099 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-16 13:55:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:55:28,738 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-16 13:55:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:55:28,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:55:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:55:28,740 INFO L225 Difference]: With dead ends: 206 [2020-09-16 13:55:28,741 INFO L226 Difference]: Without dead ends: 204 [2020-09-16 13:55:28,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:55:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-16 13:55:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-16 13:55:28,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-16 13:55:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-16 13:55:28,745 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-16 13:55:28,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:55:28,745 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-16 13:55:28,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:55:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-16 13:55:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:55:28,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:55:28,746 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:55:28,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:55:28,946 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:55:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:55:28,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-16 13:55:28,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:55:28,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533983895] [2020-09-16 13:55:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:55:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:55:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:29,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533983895] [2020-09-16 13:55:29,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891332595] [2020-09-16 13:55:29,063 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 [2020-09-16 13:55:29,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:55:29,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:55:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:55:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:55:29,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:55:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:55:30,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:55:30,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-16 13:55:30,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154151806] [2020-09-16 13:55:30,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-16 13:55:30,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:55:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-16 13:55:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-16 13:55:30,627 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-16 13:55:33,153 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-16 13:55:54,047 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-16 13:56:22,299 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-16 13:56:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:48,527 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-16 13:56:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 13:56:48,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-16 13:56:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:48,529 INFO L225 Difference]: With dead ends: 252 [2020-09-16 13:56:48,530 INFO L226 Difference]: Without dead ends: 247 [2020-09-16 13:56:48,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-16 13:56:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-16 13:56:48,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-16 13:56:48,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:56:48,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-16 13:56:48,536 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-16 13:56:48,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:48,536 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-16 13:56:48,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-16 13:56:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-16 13:56:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:48,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:48,537 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:48,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-16 13:56:48,748 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-16 13:56:48,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:48,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218824653] [2020-09-16 13:56:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:48,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218824653] [2020-09-16 13:56:48,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543572262] [2020-09-16 13:56:48,888 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 [2020-09-16 13:56:48,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:56:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:48,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:48,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:49,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:49,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:49,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341922766] [2020-09-16 13:56:49,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:49,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:49,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:49,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:49,148 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-16 13:56:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:49,451 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-16 13:56:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:49,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:49,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:49,453 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:56:49,453 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:56:49,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:56:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:56:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-16 13:56:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:56:49,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-16 13:56:49,457 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-16 13:56:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:49,457 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-16 13:56:49,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-16 13:56:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:49,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:49,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:49,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:49,659 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:49,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:49,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-16 13:56:49,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:49,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226006814] [2020-09-16 13:56:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:49,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226006814] [2020-09-16 13:56:49,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547344943] [2020-09-16 13:56:49,800 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 [2020-09-16 13:56:49,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:56:49,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:49,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:49,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:50,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:50,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:50,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556176595] [2020-09-16 13:56:50,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:50,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:50,051 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-16 13:56:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:50,477 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-16 13:56:50,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:56:50,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:50,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:50,479 INFO L225 Difference]: With dead ends: 205 [2020-09-16 13:56:50,479 INFO L226 Difference]: Without dead ends: 203 [2020-09-16 13:56:50,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:56:50,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-16 13:56:50,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-16 13:56:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:56:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-16 13:56:50,484 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-16 13:56:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:50,485 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-16 13:56:50,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-16 13:56:50,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:50,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:50,486 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:50,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:50,699 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-16 13:56:50,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:50,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302782011] [2020-09-16 13:56:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302782011] [2020-09-16 13:56:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584994390] [2020-09-16 13:56:50,833 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 [2020-09-16 13:56:50,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:56:50,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:50,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:51,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:51,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:51,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817482204] [2020-09-16 13:56:51,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:51,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:51,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:51,056 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-16 13:56:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:51,462 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-16 13:56:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:56:51,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:51,464 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:56:51,464 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:56:51,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:56:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:56:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-16 13:56:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:56:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-16 13:56:51,468 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-16 13:56:51,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:51,469 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-16 13:56:51,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-16 13:56:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:51,469 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:51,469 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:51,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:51,670 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:51,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-16 13:56:51,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:51,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237605827] [2020-09-16 13:56:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:51,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237605827] [2020-09-16 13:56:51,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405832274] [2020-09-16 13:56:51,807 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 [2020-09-16 13:56:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:51,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:52,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:52,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:52,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438243420] [2020-09-16 13:56:52,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:52,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:52,153 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-16 13:56:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:52,617 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-16 13:56:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:52,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:52,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:52,620 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:56:52,620 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:56:52,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:56:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:56:52,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-16 13:56:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:56:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-16 13:56:52,626 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-16 13:56:52,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:52,627 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-16 13:56:52,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-16 13:56:52,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:52,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:52,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:52,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-16 13:56:52,842 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:52,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:52,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-16 13:56:52,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:52,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711648005] [2020-09-16 13:56:52,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:53,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711648005] [2020-09-16 13:56:53,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555282643] [2020-09-16 13:56:53,020 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 [2020-09-16 13:56:53,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:56:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:53,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:53,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:53,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:53,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308079269] [2020-09-16 13:56:53,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:53,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:53,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:53,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:53,382 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-16 13:56:54,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:54,022 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-16 13:56:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:56:54,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:54,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:54,025 INFO L225 Difference]: With dead ends: 209 [2020-09-16 13:56:54,025 INFO L226 Difference]: Without dead ends: 207 [2020-09-16 13:56:54,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:56:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-16 13:56:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-16 13:56:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-16 13:56:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-16 13:56:54,032 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-16 13:56:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:54,032 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-16 13:56:54,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-16 13:56:54,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:54,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:54,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:54,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:54,247 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-16 13:56:54,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:54,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616614951] [2020-09-16 13:56:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:54,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616614951] [2020-09-16 13:56:54,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607293038] [2020-09-16 13:56:54,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:54,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:56:54,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:54,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:54,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:54,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:54,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:54,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451523063] [2020-09-16 13:56:54,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:54,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:54,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:54,652 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-16 13:56:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:55,135 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-16 13:56:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:56:55,136 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:55,137 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:56:55,137 INFO L226 Difference]: Without dead ends: 200 [2020-09-16 13:56:55,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-16 13:56:55,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-16 13:56:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:56:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-16 13:56:55,141 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-16 13:56:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:55,141 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-16 13:56:55,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-16 13:56:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:55,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:55,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:55,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-16 13:56:55,343 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:55,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:55,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-16 13:56:55,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:55,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822437440] [2020-09-16 13:56:55,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822437440] [2020-09-16 13:56:55,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911949854] [2020-09-16 13:56:55,474 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 [2020-09-16 13:56:55,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:56:55,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:55,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:55,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:55,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:55,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:55,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083666455] [2020-09-16 13:56:55,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:55,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:55,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:55,714 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-16 13:56:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:56,159 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-16 13:56:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:56:56,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:56,161 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:56:56,161 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:56:56,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:56,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:56:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-16 13:56:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-16 13:56:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-16 13:56:56,166 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-16 13:56:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:56,167 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-16 13:56:56,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-16 13:56:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:56,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:56,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:56,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-16 13:56:56,370 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-16 13:56:56,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:56,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795875653] [2020-09-16 13:56:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:56,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795875653] [2020-09-16 13:56:56,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364646584] [2020-09-16 13:56:56,494 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 [2020-09-16 13:56:56,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:56:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:56,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:56,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:56,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:56,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:56,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401721938] [2020-09-16 13:56:56,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:56,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:56,739 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-16 13:56:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:57,358 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-16 13:56:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:56:57,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:57,361 INFO L225 Difference]: With dead ends: 215 [2020-09-16 13:56:57,361 INFO L226 Difference]: Without dead ends: 213 [2020-09-16 13:56:57,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-16 13:56:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-16 13:56:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-16 13:56:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:56:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-16 13:56:57,365 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-16 13:56:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:57,366 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-16 13:56:57,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-16 13:56:57,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:57,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:57,367 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:57,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:57,579 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:57,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-16 13:56:57,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:57,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526983774] [2020-09-16 13:56:57,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:57,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526983774] [2020-09-16 13:56:57,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055760436] [2020-09-16 13:56:57,708 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 [2020-09-16 13:56:57,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:56:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:57,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:57,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:57,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558679065] [2020-09-16 13:56:57,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:57,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:57,935 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-16 13:56:58,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:58,479 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-16 13:56:58,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:56:58,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:58,482 INFO L225 Difference]: With dead ends: 196 [2020-09-16 13:56:58,482 INFO L226 Difference]: Without dead ends: 194 [2020-09-16 13:56:58,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:56:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-16 13:56:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-16 13:56:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:56:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:56:58,487 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:56:58,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:58,488 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:56:58,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:58,488 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:56:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:58,489 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:58,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:56:58,691 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:58,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:58,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-16 13:56:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:58,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41313603] [2020-09-16 13:56:58,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:58,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41313603] [2020-09-16 13:56:58,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641173172] [2020-09-16 13:56:58,814 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 [2020-09-16 13:56:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:58,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:56:59,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:56:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:59,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:56:59,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:56:59,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177315929] [2020-09-16 13:56:59,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:56:59,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:56:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:56:59,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:56:59,023 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:56:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:56:59,452 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-16 13:56:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:56:59,453 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:56:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:56:59,454 INFO L225 Difference]: With dead ends: 191 [2020-09-16 13:56:59,454 INFO L226 Difference]: Without dead ends: 186 [2020-09-16 13:56:59,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:56:59,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-16 13:56:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-16 13:56:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:56:59,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:56:59,458 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:56:59,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:56:59,459 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:56:59,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:56:59,459 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:56:59,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:56:59,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:56:59,460 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:56:59,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-16 13:56:59,663 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:56:59,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:56:59,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-16 13:56:59,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:56:59,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322566879] [2020-09-16 13:56:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:56:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:56:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:56:59,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322566879] [2020-09-16 13:56:59,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054582339] [2020-09-16 13:56:59,788 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 [2020-09-16 13:56:59,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:56:59,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:56:59,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:56:59,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:00,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:00,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:00,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:00,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588415098] [2020-09-16 13:57:00,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:00,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:00,123 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:57:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:01,062 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-16 13:57:01,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:57:01,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:01,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:01,064 INFO L225 Difference]: With dead ends: 232 [2020-09-16 13:57:01,065 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:57:01,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:57:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:57:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-16 13:57:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-16 13:57:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-16 13:57:01,070 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-16 13:57:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:01,071 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-16 13:57:01,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-16 13:57:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:01,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:01,072 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:01,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:01,273 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-16 13:57:01,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:01,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43114598] [2020-09-16 13:57:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:01,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43114598] [2020-09-16 13:57:01,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117444737] [2020-09-16 13:57:01,406 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 [2020-09-16 13:57:01,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:01,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:01,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:01,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:01,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:01,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:01,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:01,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930592762] [2020-09-16 13:57:01,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:01,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:01,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:01,662 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-16 13:57:02,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:02,459 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-16 13:57:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:57:02,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:02,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:02,461 INFO L225 Difference]: With dead ends: 222 [2020-09-16 13:57:02,461 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 13:57:02,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-16 13:57:02,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 13:57:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-16 13:57:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-16 13:57:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-16 13:57:02,465 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-16 13:57:02,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:02,465 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-16 13:57:02,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-16 13:57:02,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:02,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:02,466 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:02,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:02,667 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:02,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-16 13:57:02,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:02,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062523133] [2020-09-16 13:57:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:02,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062523133] [2020-09-16 13:57:02,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344541569] [2020-09-16 13:57:02,820 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 [2020-09-16 13:57:02,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:02,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:03,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:03,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:03,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:03,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284900277] [2020-09-16 13:57:03,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:03,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:03,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:03,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:03,121 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-16 13:57:04,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:04,203 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-16 13:57:04,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:04,205 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:04,206 INFO L225 Difference]: With dead ends: 254 [2020-09-16 13:57:04,207 INFO L226 Difference]: Without dead ends: 246 [2020-09-16 13:57:04,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:57:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-16 13:57:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-16 13:57:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 13:57:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-16 13:57:04,212 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-16 13:57:04,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:04,213 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-16 13:57:04,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:04,213 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-16 13:57:04,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:04,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:04,214 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:04,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:04,427 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:04,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-16 13:57:04,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:04,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912382883] [2020-09-16 13:57:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:04,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:04,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912382883] [2020-09-16 13:57:04,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938828054] [2020-09-16 13:57:04,562 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 [2020-09-16 13:57:04,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:04,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:04,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:04,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:04,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:04,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:04,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310841084] [2020-09-16 13:57:04,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:04,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:04,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:04,829 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-16 13:57:05,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:05,997 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-16 13:57:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:05,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:05,999 INFO L225 Difference]: With dead ends: 246 [2020-09-16 13:57:05,999 INFO L226 Difference]: Without dead ends: 238 [2020-09-16 13:57:05,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 13:57:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-16 13:57:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-16 13:57:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:57:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-16 13:57:06,005 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-16 13:57:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:06,006 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-16 13:57:06,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-16 13:57:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:06,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:06,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:06,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-16 13:57:06,217 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:06,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-16 13:57:06,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:06,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320896177] [2020-09-16 13:57:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:06,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320896177] [2020-09-16 13:57:06,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756152179] [2020-09-16 13:57:06,355 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 [2020-09-16 13:57:06,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:06,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:06,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:06,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:06,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:06,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648635600] [2020-09-16 13:57:06,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:06,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:06,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:06,611 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-16 13:57:07,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:07,189 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-16 13:57:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:57:07,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:07,192 INFO L225 Difference]: With dead ends: 208 [2020-09-16 13:57:07,192 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:57:07,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:57:07,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:57:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-16 13:57:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-16 13:57:07,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-16 13:57:07,196 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-16 13:57:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:07,197 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-16 13:57:07,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:07,197 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-16 13:57:07,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:07,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:07,198 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:07,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-16 13:57:07,409 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:07,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:07,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-16 13:57:07,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:07,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302988707] [2020-09-16 13:57:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:07,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302988707] [2020-09-16 13:57:07,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974535705] [2020-09-16 13:57:07,536 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 [2020-09-16 13:57:07,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:07,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:07,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:07,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:07,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042744002] [2020-09-16 13:57:07,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:07,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:07,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:07,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:07,766 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-16 13:57:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:08,550 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-16 13:57:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:57:08,551 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:08,552 INFO L225 Difference]: With dead ends: 215 [2020-09-16 13:57:08,553 INFO L226 Difference]: Without dead ends: 213 [2020-09-16 13:57:08,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:57:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-16 13:57:08,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-16 13:57:08,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:57:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-16 13:57:08,556 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-16 13:57:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:08,556 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-16 13:57:08,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:08,556 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-16 13:57:08,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:08,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:08,557 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:08,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-16 13:57:08,758 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:08,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:08,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-16 13:57:08,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:08,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203423987] [2020-09-16 13:57:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:08,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203423987] [2020-09-16 13:57:08,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801892866] [2020-09-16 13:57:08,898 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:08,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:08,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:09,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:09,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:09,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:09,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113018288] [2020-09-16 13:57:09,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:09,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:09,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:09,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:09,116 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-16 13:57:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:09,953 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-16 13:57:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:09,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:09,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:09,955 INFO L225 Difference]: With dead ends: 236 [2020-09-16 13:57:09,956 INFO L226 Difference]: Without dead ends: 228 [2020-09-16 13:57:09,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:57:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-16 13:57:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-16 13:57:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-16 13:57:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-16 13:57:09,959 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-16 13:57:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:09,960 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-16 13:57:09,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-16 13:57:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:09,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:09,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:10,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-16 13:57:10,161 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:10,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-16 13:57:10,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:10,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163014700] [2020-09-16 13:57:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:10,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163014700] [2020-09-16 13:57:10,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997641539] [2020-09-16 13:57:10,300 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 [2020-09-16 13:57:10,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:10,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:10,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:10,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:10,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:10,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:10,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:10,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080718417] [2020-09-16 13:57:10,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:10,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:10,558 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-16 13:57:11,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:11,507 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-16 13:57:11,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 13:57:11,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:11,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:11,510 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:57:11,510 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:57:11,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:57:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:57:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-16 13:57:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-16 13:57:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-16 13:57:11,514 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-16 13:57:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:11,515 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-16 13:57:11,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-16 13:57:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:11,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:11,516 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:11,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-16 13:57:11,727 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-16 13:57:11,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:11,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717276039] [2020-09-16 13:57:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:11,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717276039] [2020-09-16 13:57:11,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753538496] [2020-09-16 13:57:11,859 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 [2020-09-16 13:57:11,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-16 13:57:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:12,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:12,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:12,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-16 13:57:12,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714554406] [2020-09-16 13:57:12,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-16 13:57:12,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-16 13:57:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-16 13:57:12,095 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-16 13:57:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:12,977 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-16 13:57:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:57:12,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-16 13:57:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:12,980 INFO L225 Difference]: With dead ends: 232 [2020-09-16 13:57:12,980 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 13:57:12,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:57:12,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 13:57:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-16 13:57:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-16 13:57:12,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-16 13:57:12,985 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-16 13:57:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:12,985 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-16 13:57:12,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-16 13:57:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-16 13:57:12,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:12,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:12,985 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:13,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:13,188 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-16 13:57:13,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:13,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291257893] [2020-09-16 13:57:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:13,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291257893] [2020-09-16 13:57:13,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484145642] [2020-09-16 13:57:13,371 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 [2020-09-16 13:57:13,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 13:57:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:13,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:57:13,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:13,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:13,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 13:57:13,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243981655] [2020-09-16 13:57:13,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 13:57:13,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:13,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 13:57:13,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:57:13,729 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-16 13:57:14,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:14,158 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-16 13:57:14,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:14,158 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-16 13:57:14,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:14,159 INFO L225 Difference]: With dead ends: 185 [2020-09-16 13:57:14,159 INFO L226 Difference]: Without dead ends: 180 [2020-09-16 13:57:14,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-16 13:57:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-16 13:57:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-16 13:57:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-16 13:57:14,164 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-16 13:57:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:14,164 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-16 13:57:14,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 13:57:14,164 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-16 13:57:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:14,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:14,165 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:14,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-16 13:57:14,374 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-16 13:57:14,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:14,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414851035] [2020-09-16 13:57:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414851035] [2020-09-16 13:57:14,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476656340] [2020-09-16 13:57:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:14,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:14,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:14,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:14,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:14,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:14,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018814122] [2020-09-16 13:57:14,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:14,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:14,964 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-16 13:57:15,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:15,051 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-16 13:57:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:57:15,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:15,053 INFO L225 Difference]: With dead ends: 180 [2020-09-16 13:57:15,053 INFO L226 Difference]: Without dead ends: 177 [2020-09-16 13:57:15,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:15,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-16 13:57:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-16 13:57:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:57:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-16 13:57:15,057 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-16 13:57:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:15,057 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-16 13:57:15,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-16 13:57:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:15,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:15,058 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:15,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-16 13:57:15,259 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:15,259 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-16 13:57:15,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:15,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6049100] [2020-09-16 13:57:15,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:15,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6049100] [2020-09-16 13:57:15,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673696870] [2020-09-16 13:57:15,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:15,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:15,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:15,714 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:15,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:15,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:15,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772831855] [2020-09-16 13:57:15,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:15,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:15,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:15,716 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-16 13:57:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:15,835 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-16 13:57:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:15,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:15,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:15,837 INFO L225 Difference]: With dead ends: 197 [2020-09-16 13:57:15,837 INFO L226 Difference]: Without dead ends: 194 [2020-09-16 13:57:15,838 INFO L675 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 [2020-09-16 13:57:15,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-16 13:57:15,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-16 13:57:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-16 13:57:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-16 13:57:15,840 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-16 13:57:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:15,841 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-16 13:57:15,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-16 13:57:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:15,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:15,842 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:16,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:16,049 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:16,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-16 13:57:16,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:16,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469066927] [2020-09-16 13:57:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:16,245 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:16,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469066927] [2020-09-16 13:57:16,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837777289] [2020-09-16 13:57:16,246 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:16,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 13:57:16,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:16,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:16,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:16,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:16,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:16,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179211282] [2020-09-16 13:57:16,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:16,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:16,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:16,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:16,504 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-16 13:57:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:16,624 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-16 13:57:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:57:16,625 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:16,626 INFO L225 Difference]: With dead ends: 196 [2020-09-16 13:57:16,626 INFO L226 Difference]: Without dead ends: 193 [2020-09-16 13:57:16,626 INFO L675 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 [2020-09-16 13:57:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-16 13:57:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-16 13:57:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-16 13:57:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-16 13:57:16,629 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-16 13:57:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:16,629 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-16 13:57:16,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-16 13:57:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:16,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:16,630 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:16,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:16,831 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:16,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-16 13:57:16,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:16,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626270248] [2020-09-16 13:57:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:16,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626270248] [2020-09-16 13:57:16,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322202784] [2020-09-16 13:57:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:17,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 13:57:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:17,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:17,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:17,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:17,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96831508] [2020-09-16 13:57:17,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:17,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:17,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:17,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:17,249 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-16 13:57:17,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:17,421 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-16 13:57:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:17,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:17,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:17,423 INFO L225 Difference]: With dead ends: 195 [2020-09-16 13:57:17,423 INFO L226 Difference]: Without dead ends: 192 [2020-09-16 13:57:17,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:57:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-16 13:57:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-16 13:57:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-16 13:57:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-16 13:57:17,426 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-16 13:57:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:17,427 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-16 13:57:17,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-16 13:57:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:17,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:17,427 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:17,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:17,628 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:17,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:17,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-16 13:57:17,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:17,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857119217] [2020-09-16 13:57:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:17,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857119217] [2020-09-16 13:57:17,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216209429] [2020-09-16 13:57:17,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:18,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:18,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:18,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741422324] [2020-09-16 13:57:18,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:18,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:18,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:18,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:18,028 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-16 13:57:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:18,245 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-16 13:57:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:18,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:18,248 INFO L225 Difference]: With dead ends: 194 [2020-09-16 13:57:18,248 INFO L226 Difference]: Without dead ends: 191 [2020-09-16 13:57:18,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:57:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-16 13:57:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-16 13:57:18,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-16 13:57:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-16 13:57:18,252 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-16 13:57:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:18,252 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-16 13:57:18,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:18,252 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-16 13:57:18,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:18,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:18,253 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:18,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:18,463 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:18,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-16 13:57:18,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:18,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550905651] [2020-09-16 13:57:18,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:18,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:18,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550905651] [2020-09-16 13:57:18,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952672588] [2020-09-16 13:57:18,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:18,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:18,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:18,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:18,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:18,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:18,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531494170] [2020-09-16 13:57:18,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:18,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:18,857 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-16 13:57:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:19,103 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-16 13:57:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:57:19,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:19,105 INFO L225 Difference]: With dead ends: 193 [2020-09-16 13:57:19,105 INFO L226 Difference]: Without dead ends: 190 [2020-09-16 13:57:19,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-16 13:57:19,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-16 13:57:19,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-16 13:57:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-16 13:57:19,108 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-16 13:57:19,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:19,109 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-16 13:57:19,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:19,109 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-16 13:57:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 13:57:19,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:19,109 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:19,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-16 13:57:19,310 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:19,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-16 13:57:19,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:19,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470436005] [2020-09-16 13:57:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:19,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470436005] [2020-09-16 13:57:19,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029134513] [2020-09-16 13:57:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:19,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:19,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:19,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:57:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:19,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:19,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:19,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294202915] [2020-09-16 13:57:19,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:19,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:19,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:19,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:19,694 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-16 13:57:20,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:20,004 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-16 13:57:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:20,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-16 13:57:20,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:20,006 INFO L225 Difference]: With dead ends: 202 [2020-09-16 13:57:20,006 INFO L226 Difference]: Without dead ends: 196 [2020-09-16 13:57:20,007 INFO L675 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 [2020-09-16 13:57:20,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-16 13:57:20,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-16 13:57:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-16 13:57:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-16 13:57:20,010 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-16 13:57:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:20,011 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-16 13:57:20,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-16 13:57:20,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:20,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:20,011 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:20,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-16 13:57:20,220 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-16 13:57:20,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:20,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468650120] [2020-09-16 13:57:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:20,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468650120] [2020-09-16 13:57:20,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790173308] [2020-09-16 13:57:20,379 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 [2020-09-16 13:57:20,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:20,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:20,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:20,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:20,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011944716] [2020-09-16 13:57:20,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:20,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:20,646 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-16 13:57:20,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:20,720 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-16 13:57:20,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-16 13:57:20,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:20,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:20,722 INFO L225 Difference]: With dead ends: 188 [2020-09-16 13:57:20,722 INFO L226 Difference]: Without dead ends: 186 [2020-09-16 13:57:20,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-16 13:57:20,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-16 13:57:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:57:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-16 13:57:20,726 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-16 13:57:20,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:20,726 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-16 13:57:20,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-16 13:57:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:20,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:20,727 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:20,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-16 13:57:20,927 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:20,928 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-16 13:57:20,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:20,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715977034] [2020-09-16 13:57:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:21,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715977034] [2020-09-16 13:57:21,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079823973] [2020-09-16 13:57:21,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:21,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:21,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:21,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:21,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:21,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:21,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:21,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909719128] [2020-09-16 13:57:21,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:21,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:21,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:21,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:21,349 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-16 13:57:21,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:21,626 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-16 13:57:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:21,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:21,629 INFO L225 Difference]: With dead ends: 199 [2020-09-16 13:57:21,629 INFO L226 Difference]: Without dead ends: 197 [2020-09-16 13:57:21,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-16 13:57:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-16 13:57:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 13:57:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-16 13:57:21,632 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-16 13:57:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:21,632 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-16 13:57:21,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-16 13:57:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:21,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:21,633 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:21,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-16 13:57:21,834 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:21,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:21,834 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-16 13:57:21,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:21,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650210535] [2020-09-16 13:57:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:21,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:21,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650210535] [2020-09-16 13:57:21,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198667753] [2020-09-16 13:57:21,993 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:22,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:22,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:23,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:23,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:23,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455329771] [2020-09-16 13:57:23,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:23,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:23,487 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:23,836 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-16 13:57:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:57:23,837 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:23,838 INFO L225 Difference]: With dead ends: 210 [2020-09-16 13:57:23,838 INFO L226 Difference]: Without dead ends: 208 [2020-09-16 13:57:23,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-16 13:57:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-16 13:57:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-16 13:57:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-16 13:57:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-16 13:57:23,840 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-16 13:57:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:23,841 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-16 13:57:23,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-16 13:57:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:23,841 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:23,841 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:24,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-16 13:57:24,042 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-16 13:57:24,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:24,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475731082] [2020-09-16 13:57:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:24,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475731082] [2020-09-16 13:57:24,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830541728] [2020-09-16 13:57:24,238 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 [2020-09-16 13:57:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:24,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:24,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:24,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:24,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:24,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061423707] [2020-09-16 13:57:24,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:24,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:24,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:24,674 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-16 13:57:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:25,157 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-16 13:57:25,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:25,157 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:25,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:25,158 INFO L225 Difference]: With dead ends: 210 [2020-09-16 13:57:25,158 INFO L226 Difference]: Without dead ends: 208 [2020-09-16 13:57:25,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-16 13:57:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-16 13:57:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 13:57:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-16 13:57:25,165 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-16 13:57:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:25,165 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-16 13:57:25,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-16 13:57:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:25,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:25,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:25,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-16 13:57:25,369 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-16 13:57:25,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:25,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265449297] [2020-09-16 13:57:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:25,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:25,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265449297] [2020-09-16 13:57:25,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872496162] [2020-09-16 13:57:25,549 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 [2020-09-16 13:57:25,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-16 13:57:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:25,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:25,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:29,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:29,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:29,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337058675] [2020-09-16 13:57:29,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:29,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:57:29,682 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:33,984 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:57:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:34,394 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-16 13:57:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:34,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:34,396 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:57:34,397 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:57:34,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-16 13:57:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:57:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-16 13:57:34,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:34,402 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:34,402 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:34,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:34,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:34,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:34,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:34,604 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:34,605 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-16 13:57:34,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:34,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244492341] [2020-09-16 13:57:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:34,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244492341] [2020-09-16 13:57:34,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541714799] [2020-09-16 13:57:34,799 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 [2020-09-16 13:57:34,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:34,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:34,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:34,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:35,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:35,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:35,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985277676] [2020-09-16 13:57:35,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:35,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:35,203 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:35,731 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-16 13:57:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:35,732 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:35,733 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:35,734 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:35,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:35,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-16 13:57:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-16 13:57:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-16 13:57:35,738 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-16 13:57:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:35,738 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-16 13:57:35,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-16 13:57:35,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:35,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:35,740 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:35,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:35,951 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:35,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:35,952 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-16 13:57:35,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:35,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14180464] [2020-09-16 13:57:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14180464] [2020-09-16 13:57:36,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265108543] [2020-09-16 13:57:36,145 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 [2020-09-16 13:57:36,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:36,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:36,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:36,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:36,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631394770] [2020-09-16 13:57:36,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:36,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:36,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:36,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:36,458 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-16 13:57:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:36,991 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-16 13:57:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:57:36,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:36,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:36,993 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:36,993 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:36,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:36,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:36,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-16 13:57:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:36,996 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:36,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:36,996 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:36,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:36,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:36,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:36,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:37,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:37,198 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:37,199 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-16 13:57:37,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724542701] [2020-09-16 13:57:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:37,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724542701] [2020-09-16 13:57:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833817470] [2020-09-16 13:57:37,382 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 [2020-09-16 13:57:37,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 13:57:37,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:37,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:37,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:37,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:37,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:37,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165571063] [2020-09-16 13:57:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:37,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:37,702 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:38,247 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-16 13:57:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:38,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:38,249 INFO L225 Difference]: With dead ends: 224 [2020-09-16 13:57:38,249 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 13:57:38,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 13:57:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-16 13:57:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:38,253 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:38,253 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:38,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:38,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:38,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:38,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:38,457 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-16 13:57:38,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:38,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52179587] [2020-09-16 13:57:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:38,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52179587] [2020-09-16 13:57:38,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995792457] [2020-09-16 13:57:38,646 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 [2020-09-16 13:57:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:38,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:38,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:38,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677208376] [2020-09-16 13:57:38,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:38,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:38,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:38,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:38,972 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:39,454 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-16 13:57:39,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:39,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:39,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:39,457 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:57:39,457 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:57:39,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:57:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-16 13:57:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 13:57:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-16 13:57:39,461 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-16 13:57:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:39,461 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-16 13:57:39,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-16 13:57:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:39,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:39,462 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:39,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:39,663 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-16 13:57:39,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:39,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704690178] [2020-09-16 13:57:39,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:39,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704690178] [2020-09-16 13:57:39,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487703034] [2020-09-16 13:57:39,848 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 [2020-09-16 13:57:39,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:39,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:39,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:40,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:40,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:40,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563863320] [2020-09-16 13:57:40,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:40,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:40,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:40,158 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:40,577 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-16 13:57:40,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:40,578 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:40,579 INFO L225 Difference]: With dead ends: 206 [2020-09-16 13:57:40,579 INFO L226 Difference]: Without dead ends: 204 [2020-09-16 13:57:40,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-16 13:57:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-16 13:57:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-16 13:57:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-16 13:57:40,583 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-16 13:57:40,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:40,583 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-16 13:57:40,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-16 13:57:40,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:40,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:40,584 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:40,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-16 13:57:40,785 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:40,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-16 13:57:40,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:40,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046664092] [2020-09-16 13:57:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:40,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046664092] [2020-09-16 13:57:40,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143447880] [2020-09-16 13:57:40,979 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 [2020-09-16 13:57:41,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 13:57:41,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:41,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:41,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:41,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:41,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617396389] [2020-09-16 13:57:41,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:41,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:41,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:41,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:41,300 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-16 13:57:41,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:41,729 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-16 13:57:41,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:41,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:41,732 INFO L225 Difference]: With dead ends: 207 [2020-09-16 13:57:41,733 INFO L226 Difference]: Without dead ends: 205 [2020-09-16 13:57:41,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-16 13:57:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-16 13:57:41,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:57:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-16 13:57:41,738 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-16 13:57:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:41,738 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-16 13:57:41,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:41,739 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-16 13:57:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:41,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:41,739 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:41,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-16 13:57:41,940 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-16 13:57:41,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:41,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171748237] [2020-09-16 13:57:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:42,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171748237] [2020-09-16 13:57:42,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446931662] [2020-09-16 13:57:42,136 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 [2020-09-16 13:57:42,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:42,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:42,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:42,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:42,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:42,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:42,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569768088] [2020-09-16 13:57:42,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:42,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:42,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:42,459 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-16 13:57:42,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:42,903 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-16 13:57:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:57:42,904 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:42,905 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:57:42,905 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:57:42,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:57:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-16 13:57:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 13:57:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-16 13:57:42,909 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-16 13:57:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:42,909 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-16 13:57:42,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-16 13:57:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:42,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:42,910 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:43,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-16 13:57:43,111 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:43,111 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-16 13:57:43,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:43,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088667212] [2020-09-16 13:57:43,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:43,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088667212] [2020-09-16 13:57:43,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212181033] [2020-09-16 13:57:43,323 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 [2020-09-16 13:57:43,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:43,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:43,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:43,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:43,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:43,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482849903] [2020-09-16 13:57:43,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:43,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:43,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:43,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:43,807 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-16 13:57:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:44,449 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-16 13:57:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:44,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:44,451 INFO L225 Difference]: With dead ends: 223 [2020-09-16 13:57:44,451 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 13:57:44,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 13:57:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-16 13:57:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:57:44,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-16 13:57:44,456 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-16 13:57:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:44,457 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-16 13:57:44,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:44,457 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-16 13:57:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:44,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:44,457 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:44,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-16 13:57:44,660 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-16 13:57:44,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:44,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118229222] [2020-09-16 13:57:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:44,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:44,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118229222] [2020-09-16 13:57:44,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216241809] [2020-09-16 13:57:44,866 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 [2020-09-16 13:57:44,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:44,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:44,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:45,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:45,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:45,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902943472] [2020-09-16 13:57:45,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:45,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:45,195 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-16 13:57:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:45,699 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-16 13:57:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:45,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:45,702 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:57:45,702 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:57:45,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:57:45,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:57:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-16 13:57:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:57:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-16 13:57:45,706 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-16 13:57:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:45,706 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-16 13:57:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-16 13:57:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:45,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:45,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:45,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:45,908 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-16 13:57:45,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:45,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168674482] [2020-09-16 13:57:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168674482] [2020-09-16 13:57:46,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444568223] [2020-09-16 13:57:46,127 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 [2020-09-16 13:57:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:46,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:46,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:46,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:46,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:46,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584773337] [2020-09-16 13:57:46,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:46,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:46,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:46,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:46,485 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-16 13:57:46,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:46,976 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-16 13:57:46,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:57:46,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:46,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:46,978 INFO L225 Difference]: With dead ends: 214 [2020-09-16 13:57:46,978 INFO L226 Difference]: Without dead ends: 212 [2020-09-16 13:57:46,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:46,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-16 13:57:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-16 13:57:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:57:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-16 13:57:46,981 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-16 13:57:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:46,982 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-16 13:57:46,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-16 13:57:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:46,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:46,982 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:47,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:47,183 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:47,184 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-16 13:57:47,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:47,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347286630] [2020-09-16 13:57:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:47,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347286630] [2020-09-16 13:57:47,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261241735] [2020-09-16 13:57:47,444 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 [2020-09-16 13:57:47,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:57:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:47,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:47,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:47,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528862882] [2020-09-16 13:57:47,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:47,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:47,792 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-16 13:57:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:48,144 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-16 13:57:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:48,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:48,147 INFO L225 Difference]: With dead ends: 203 [2020-09-16 13:57:48,147 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 13:57:48,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-16 13:57:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 13:57:48,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-16 13:57:48,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 13:57:48,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-16 13:57:48,151 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-16 13:57:48,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:48,152 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-16 13:57:48,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-16 13:57:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:48,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:48,152 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:48,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-16 13:57:48,353 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-16 13:57:48,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:48,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013462901] [2020-09-16 13:57:48,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:48,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013462901] [2020-09-16 13:57:48,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692594636] [2020-09-16 13:57:48,662 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 [2020-09-16 13:57:48,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:57:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:48,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:48,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:49,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:49,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:49,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960979214] [2020-09-16 13:57:49,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:49,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:49,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:49,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:49,003 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-16 13:57:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:49,126 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-16 13:57:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 13:57:49,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:49,128 INFO L225 Difference]: With dead ends: 212 [2020-09-16 13:57:49,128 INFO L226 Difference]: Without dead ends: 210 [2020-09-16 13:57:49,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-16 13:57:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-16 13:57:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-16 13:57:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:57:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-16 13:57:49,133 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-16 13:57:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:49,133 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-16 13:57:49,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-16 13:57:49,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:49,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:49,134 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:49,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:49,334 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-16 13:57:49,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:49,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168530814] [2020-09-16 13:57:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:49,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168530814] [2020-09-16 13:57:49,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836262666] [2020-09-16 13:57:49,599 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 [2020-09-16 13:57:49,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:57:49,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:49,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:49,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:49,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:49,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355306515] [2020-09-16 13:57:49,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:49,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:49,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:49,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:49,922 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-16 13:57:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:50,322 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-16 13:57:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:50,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:50,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:50,324 INFO L225 Difference]: With dead ends: 217 [2020-09-16 13:57:50,324 INFO L226 Difference]: Without dead ends: 215 [2020-09-16 13:57:50,325 INFO L675 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 [2020-09-16 13:57:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-16 13:57:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-16 13:57:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:57:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-16 13:57:50,329 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-16 13:57:50,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:50,329 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-16 13:57:50,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:50,329 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-16 13:57:50,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:50,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:50,330 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:50,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:50,531 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:50,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:50,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-16 13:57:50,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:50,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976518267] [2020-09-16 13:57:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:50,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976518267] [2020-09-16 13:57:50,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459375290] [2020-09-16 13:57:50,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:50,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:57:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:50,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:50,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:51,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:51,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:51,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773785806] [2020-09-16 13:57:51,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:51,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:51,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:51,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:51,187 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-16 13:57:51,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:51,729 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-16 13:57:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:57:51,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:51,731 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:57:51,731 INFO L226 Difference]: Without dead ends: 225 [2020-09-16 13:57:51,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:57:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-16 13:57:51,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-16 13:57:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:57:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-16 13:57:51,735 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-16 13:57:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:51,736 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-16 13:57:51,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-16 13:57:51,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:51,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:51,736 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:51,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:57:51,937 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-16 13:57:51,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:51,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210958047] [2020-09-16 13:57:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:51,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:52,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210958047] [2020-09-16 13:57:52,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838906587] [2020-09-16 13:57:52,154 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 [2020-09-16 13:57:52,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:57:52,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:57:52,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:52,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:52,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:52,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:52,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:52,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890475461] [2020-09-16 13:57:52,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:52,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:52,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:52,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:57:52,530 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-16 13:57:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:57:53,154 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-16 13:57:53,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:57:53,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:57:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:57:53,157 INFO L225 Difference]: With dead ends: 227 [2020-09-16 13:57:53,157 INFO L226 Difference]: Without dead ends: 225 [2020-09-16 13:57:53,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:57:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-16 13:57:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-16 13:57:53,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:57:53,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-16 13:57:53,161 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-16 13:57:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:57:53,161 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-16 13:57:53,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:57:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-16 13:57:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:57:53,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:57:53,162 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:57:53,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-16 13:57:53,365 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:57:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:57:53,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-16 13:57:53,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:57:53,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033988218] [2020-09-16 13:57:53,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:57:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:53,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033988218] [2020-09-16 13:57:53,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88590130] [2020-09-16 13:57:53,614 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 [2020-09-16 13:57:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:57:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:57:53,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:57:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:57:58,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:57:58,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:57:58,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553492532] [2020-09-16 13:57:58,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:57:58,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:57:58,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:57:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:57:58,374 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-16 13:58:02,694 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:58:03,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:03,236 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-16 13:58:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:03,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:03,238 INFO L225 Difference]: With dead ends: 237 [2020-09-16 13:58:03,239 INFO L226 Difference]: Without dead ends: 235 [2020-09-16 13:58:03,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-16 13:58:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-16 13:58:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-16 13:58:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:58:03,242 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:58:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:03,243 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:58:03,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:03,243 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:58:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:03,243 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:03,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-16 13:58:03,444 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:03,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-16 13:58:03,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:03,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813735036] [2020-09-16 13:58:03,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:03,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813735036] [2020-09-16 13:58:03,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104645483] [2020-09-16 13:58:03,675 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 [2020-09-16 13:58:03,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:04,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:04,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:04,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503503246] [2020-09-16 13:58:04,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:04,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:04,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:04,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:04,109 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:58:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:04,883 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-16 13:58:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:04,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:04,885 INFO L225 Difference]: With dead ends: 229 [2020-09-16 13:58:04,885 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:58:04,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:58:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:58:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-16 13:58:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:58:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-16 13:58:04,889 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-16 13:58:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:04,889 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-16 13:58:04,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-16 13:58:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:04,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:04,890 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:05,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-16 13:58:05,091 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-16 13:58:05,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:05,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531073502] [2020-09-16 13:58:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:05,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:05,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531073502] [2020-09-16 13:58:05,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861080860] [2020-09-16 13:58:05,313 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 [2020-09-16 13:58:05,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:05,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:05,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:05,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:05,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357370950] [2020-09-16 13:58:05,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:05,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:05,679 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-16 13:58:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:06,425 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-16 13:58:06,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:06,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:06,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:06,427 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:58:06,427 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:58:06,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:58:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-16 13:58:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:58:06,431 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:58:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:06,431 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:58:06,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:58:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:06,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:06,432 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:06,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-16 13:58:06,633 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-16 13:58:06,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:06,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144102527] [2020-09-16 13:58:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144102527] [2020-09-16 13:58:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048159808] [2020-09-16 13:58:06,848 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 [2020-09-16 13:58:06,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:07,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:07,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:07,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198495777] [2020-09-16 13:58:07,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:07,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:07,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:07,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:07,352 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:58:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:08,319 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-16 13:58:08,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:58:08,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:08,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:08,321 INFO L225 Difference]: With dead ends: 239 [2020-09-16 13:58:08,321 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 13:58:08,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 13:58:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-16 13:58:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:58:08,325 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:58:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:08,325 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:58:08,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:58:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:08,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:08,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-16 13:58:08,527 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-16 13:58:08,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:08,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65677797] [2020-09-16 13:58:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:08,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65677797] [2020-09-16 13:58:08,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944905626] [2020-09-16 13:58:08,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:08,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:58:08,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:09,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:09,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:09,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548203571] [2020-09-16 13:58:09,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:09,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:09,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:09,108 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:58:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:09,777 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-16 13:58:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:09,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:09,780 INFO L225 Difference]: With dead ends: 234 [2020-09-16 13:58:09,780 INFO L226 Difference]: Without dead ends: 232 [2020-09-16 13:58:09,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-16 13:58:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-16 13:58:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-16 13:58:09,785 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-16 13:58:09,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:09,785 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-16 13:58:09,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-16 13:58:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:09,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:09,786 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:09,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-16 13:58:09,998 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-16 13:58:09,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:09,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613200269] [2020-09-16 13:58:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:10,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613200269] [2020-09-16 13:58:10,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217144751] [2020-09-16 13:58:10,206 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 [2020-09-16 13:58:10,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:10,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:10,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:10,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:10,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:10,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:10,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719958014] [2020-09-16 13:58:10,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:10,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:10,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:10,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:10,565 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-16 13:58:11,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:11,162 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-16 13:58:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:11,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:11,165 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:58:11,165 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:58:11,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:58:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:58:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-16 13:58:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 13:58:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-16 13:58:11,169 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-16 13:58:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:11,169 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-16 13:58:11,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-16 13:58:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:11,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:11,170 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:11,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:11,371 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:11,372 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-16 13:58:11,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:11,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725002787] [2020-09-16 13:58:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:11,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725002787] [2020-09-16 13:58:11,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703727893] [2020-09-16 13:58:11,672 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 [2020-09-16 13:58:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:11,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:12,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:12,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:12,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548396428] [2020-09-16 13:58:12,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:12,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:12,067 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-16 13:58:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:12,270 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-16 13:58:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 13:58:12,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:12,273 INFO L225 Difference]: With dead ends: 208 [2020-09-16 13:58:12,273 INFO L226 Difference]: Without dead ends: 206 [2020-09-16 13:58:12,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-16 13:58:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-16 13:58:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-16 13:58:12,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 13:58:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-16 13:58:12,277 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-16 13:58:12,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:12,278 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-16 13:58:12,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:12,278 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-16 13:58:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:12,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:12,278 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:12,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:12,479 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:12,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-16 13:58:12,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:12,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069622995] [2020-09-16 13:58:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:12,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069622995] [2020-09-16 13:58:12,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679269848] [2020-09-16 13:58:12,749 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 [2020-09-16 13:58:12,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:12,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:13,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:13,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:13,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557651495] [2020-09-16 13:58:13,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:13,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:13,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:13,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:13,096 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-16 13:58:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:13,614 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-16 13:58:13,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:13,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:13,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:13,616 INFO L225 Difference]: With dead ends: 229 [2020-09-16 13:58:13,617 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 13:58:13,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-16 13:58:13,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 13:58:13,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-16 13:58:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-16 13:58:13,622 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-16 13:58:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:13,622 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-16 13:58:13,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-16 13:58:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:13,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:13,622 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:13,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:13,823 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-16 13:58:13,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:13,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024994110] [2020-09-16 13:58:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:14,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:14,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024994110] [2020-09-16 13:58:14,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569067284] [2020-09-16 13:58:14,064 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 [2020-09-16 13:58:14,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:14,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:14,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:14,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:15,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:15,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:15,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372979226] [2020-09-16 13:58:15,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:15,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:15,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:15,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:15,617 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:16,250 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-16 13:58:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:16,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:16,252 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:58:16,252 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:16,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:58:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-16 13:58:16,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:58:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-16 13:58:16,257 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-16 13:58:16,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:16,257 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-16 13:58:16,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-16 13:58:16,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:16,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:16,258 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:16,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:16,459 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:16,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:16,460 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-16 13:58:16,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:16,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515963] [2020-09-16 13:58:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:16,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515963] [2020-09-16 13:58:16,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642826222] [2020-09-16 13:58:16,671 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 [2020-09-16 13:58:16,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:16,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:17,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:17,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:17,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106331719] [2020-09-16 13:58:17,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:17,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:17,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:17,079 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-16 13:58:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:17,854 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-16 13:58:17,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:17,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:17,856 INFO L225 Difference]: With dead ends: 233 [2020-09-16 13:58:17,857 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 13:58:17,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 13:58:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-16 13:58:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-16 13:58:17,862 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-16 13:58:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:17,862 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-16 13:58:17,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-16 13:58:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:17,863 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:17,863 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:18,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:18,073 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-16 13:58:18,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:18,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277769894] [2020-09-16 13:58:18,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:18,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:18,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277769894] [2020-09-16 13:58:18,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863519021] [2020-09-16 13:58:18,285 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:18,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:18,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:18,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:18,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:22,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:22,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:22,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308161581] [2020-09-16 13:58:22,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:22,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:58:22,150 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:26,518 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:58:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:27,063 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-16 13:58:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:27,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:27,066 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:58:27,066 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 13:58:27,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-16 13:58:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 13:58:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-16 13:58:27,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:27,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-16 13:58:27,070 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-16 13:58:27,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:27,070 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-16 13:58:27,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-16 13:58:27,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:27,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:27,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:27,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:27,272 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-16 13:58:27,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:27,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531759127] [2020-09-16 13:58:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:27,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531759127] [2020-09-16 13:58:27,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022132281] [2020-09-16 13:58:27,465 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 [2020-09-16 13:58:27,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:27,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:27,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:27,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:27,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234255807] [2020-09-16 13:58:27,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:27,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:27,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:27,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:27,887 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-16 13:58:28,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:28,776 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-16 13:58:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:28,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:28,779 INFO L225 Difference]: With dead ends: 233 [2020-09-16 13:58:28,779 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 13:58:28,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 13:58:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-16 13:58:28,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:58:28,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-16 13:58:28,783 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-16 13:58:28,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:28,783 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-16 13:58:28,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:28,783 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-16 13:58:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:28,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:28,783 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:28,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-16 13:58:28,984 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-16 13:58:28,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:28,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305796527] [2020-09-16 13:58:28,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:28,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:29,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305796527] [2020-09-16 13:58:29,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330251811] [2020-09-16 13:58:29,246 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 [2020-09-16 13:58:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:29,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:29,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:29,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:29,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619249826] [2020-09-16 13:58:29,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:29,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:29,617 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-16 13:58:29,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:29,882 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-16 13:58:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 13:58:29,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:29,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:29,885 INFO L225 Difference]: With dead ends: 204 [2020-09-16 13:58:29,885 INFO L226 Difference]: Without dead ends: 202 [2020-09-16 13:58:29,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-16 13:58:29,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-16 13:58:29,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-16 13:58:29,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-16 13:58:29,889 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-16 13:58:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:29,889 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-16 13:58:29,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-16 13:58:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:29,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:29,890 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:30,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:30,090 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:30,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:30,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-16 13:58:30,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:30,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739836686] [2020-09-16 13:58:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:30,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739836686] [2020-09-16 13:58:30,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048784059] [2020-09-16 13:58:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:30,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:30,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:30,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:30,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:30,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:30,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:30,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150061620] [2020-09-16 13:58:30,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:30,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:30,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:30,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:30,694 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-16 13:58:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:31,245 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-16 13:58:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:31,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:31,248 INFO L225 Difference]: With dead ends: 225 [2020-09-16 13:58:31,248 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 13:58:31,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-16 13:58:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 13:58:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-16 13:58:31,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:31,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-16 13:58:31,252 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-16 13:58:31,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:31,252 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-16 13:58:31,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:31,253 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-16 13:58:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:31,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:31,253 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:31,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-16 13:58:31,454 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-16 13:58:31,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:31,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009010872] [2020-09-16 13:58:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:31,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009010872] [2020-09-16 13:58:31,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274309344] [2020-09-16 13:58:31,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:31,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:31,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:32,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:32,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:32,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709834898] [2020-09-16 13:58:32,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:32,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:32,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:32,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:32,027 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-16 13:58:32,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:32,720 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-09-16 13:58:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:58:32,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:32,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:32,722 INFO L225 Difference]: With dead ends: 231 [2020-09-16 13:58:32,722 INFO L226 Difference]: Without dead ends: 229 [2020-09-16 13:58:32,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:58:32,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-16 13:58:32,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-09-16 13:58:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 13:58:32,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-16 13:58:32,726 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-16 13:58:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:32,727 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-16 13:58:32,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-16 13:58:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:32,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:32,727 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:32,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:32,928 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:32,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:32,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-09-16 13:58:32,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:32,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584244651] [2020-09-16 13:58:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:32,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:33,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584244651] [2020-09-16 13:58:33,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984154609] [2020-09-16 13:58:33,173 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 [2020-09-16 13:58:33,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:33,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:33,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:33,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:33,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:33,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:33,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479314600] [2020-09-16 13:58:33,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:33,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:33,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:33,533 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-16 13:58:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:33,864 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-16 13:58:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 13:58:33,866 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:33,867 INFO L225 Difference]: With dead ends: 200 [2020-09-16 13:58:33,867 INFO L226 Difference]: Without dead ends: 198 [2020-09-16 13:58:33,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-16 13:58:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-16 13:58:33,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-16 13:58:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:58:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-16 13:58:33,871 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-16 13:58:33,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:33,872 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-16 13:58:33,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:33,872 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-16 13:58:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:33,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:33,873 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:34,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:34,078 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-09-16 13:58:34,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:34,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213127029] [2020-09-16 13:58:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:34,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213127029] [2020-09-16 13:58:34,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819944163] [2020-09-16 13:58:34,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:34,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:58:34,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:34,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:34,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:34,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:34,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:34,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586761546] [2020-09-16 13:58:34,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:34,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:34,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:34,700 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-16 13:58:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:35,560 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-16 13:58:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 13:58:35,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:35,564 INFO L225 Difference]: With dead ends: 221 [2020-09-16 13:58:35,564 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 13:58:35,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-16 13:58:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 13:58:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-09-16 13:58:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-16 13:58:35,570 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-16 13:58:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:35,571 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-16 13:58:35,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-16 13:58:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:35,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:35,572 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:35,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-09-16 13:58:35,773 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:35,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-09-16 13:58:35,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:35,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534311240] [2020-09-16 13:58:35,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:36,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534311240] [2020-09-16 13:58:36,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253278584] [2020-09-16 13:58:36,001 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 [2020-09-16 13:58:36,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-16 13:58:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:36,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:36,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-16 13:58:36,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237161817] [2020-09-16 13:58:36,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-16 13:58:36,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-16 13:58:36,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-16 13:58:36,108 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-09-16 13:58:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:36,393 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-16 13:58:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 13:58:36,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-16 13:58:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:36,395 INFO L225 Difference]: With dead ends: 201 [2020-09-16 13:58:36,395 INFO L226 Difference]: Without dead ends: 199 [2020-09-16 13:58:36,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-09-16 13:58:36,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-16 13:58:36,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-16 13:58:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:36,398 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:36,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:36,398 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:36,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-16 13:58:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:36,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:36,399 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:36,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:36,600 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:36,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:36,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-09-16 13:58:36,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:36,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052596160] [2020-09-16 13:58:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:36,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052596160] [2020-09-16 13:58:36,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862369646] [2020-09-16 13:58:36,790 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 [2020-09-16 13:58:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:36,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:36,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:37,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:58:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:37,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:37,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:37,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575443875] [2020-09-16 13:58:37,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:37,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:37,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:37,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:37,186 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:38,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:38,045 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-16 13:58:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:38,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:38,048 INFO L225 Difference]: With dead ends: 226 [2020-09-16 13:58:38,048 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 13:58:38,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:38,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 13:58:38,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-16 13:58:38,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:38,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-16 13:58:38,052 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-16 13:58:38,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:38,052 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-16 13:58:38,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:38,052 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-16 13:58:38,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:38,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:38,053 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:38,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:38,254 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-09-16 13:58:38,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:38,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850790040] [2020-09-16 13:58:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:38,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850790040] [2020-09-16 13:58:38,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190855125] [2020-09-16 13:58:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:38,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:38,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:38,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:38,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:38,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:38,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:38,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241302524] [2020-09-16 13:58:38,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:38,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:38,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:38,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:38,816 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-16 13:58:39,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:39,487 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-16 13:58:39,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 13:58:39,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:39,489 INFO L225 Difference]: With dead ends: 218 [2020-09-16 13:58:39,489 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 13:58:39,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:39,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 13:58:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-16 13:58:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:39,502 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:39,502 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:39,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:39,503 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:39,503 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:39,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:39,704 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-09-16 13:58:39,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:39,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384440521] [2020-09-16 13:58:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:39,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384440521] [2020-09-16 13:58:39,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018618234] [2020-09-16 13:58:39,888 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 [2020-09-16 13:58:39,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:58:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:39,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:40,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:40,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:40,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:40,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438857555] [2020-09-16 13:58:40,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:40,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:40,280 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:41,405 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-16 13:58:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 13:58:41,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:41,408 INFO L225 Difference]: With dead ends: 248 [2020-09-16 13:58:41,408 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 13:58:41,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:58:41,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 13:58:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-16 13:58:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:41,413 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:41,413 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:41,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:41,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:41,413 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:41,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:41,614 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:41,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-09-16 13:58:41,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:41,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877885821] [2020-09-16 13:58:41,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:41,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877885821] [2020-09-16 13:58:41,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466246960] [2020-09-16 13:58:41,802 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 [2020-09-16 13:58:41,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:58:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:41,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:41,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:42,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:58:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:42,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:42,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:42,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598708265] [2020-09-16 13:58:42,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:42,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:42,137 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:43,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:43,001 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-09-16 13:58:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:43,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:43,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:43,002 INFO L225 Difference]: With dead ends: 238 [2020-09-16 13:58:43,003 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:43,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 13:58:43,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:43,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-16 13:58:43,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:58:43,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-16 13:58:43,007 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-16 13:58:43,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:43,007 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-16 13:58:43,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:43,007 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-16 13:58:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:43,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:43,008 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:43,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:43,212 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:43,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:43,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-09-16 13:58:43,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:43,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10646717] [2020-09-16 13:58:43,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:43,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:43,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10646717] [2020-09-16 13:58:43,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187219689] [2020-09-16 13:58:43,398 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 [2020-09-16 13:58:43,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:58:43,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:43,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:43,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:43,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:43,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:43,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736041659] [2020-09-16 13:58:43,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:43,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:43,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:43,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:43,827 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-16 13:58:44,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:44,804 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-16 13:58:44,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 13:58:44,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:44,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:44,806 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:58:44,806 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:58:44,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:58:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:58:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-16 13:58:44,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:58:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-16 13:58:44,812 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-16 13:58:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:44,812 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-16 13:58:44,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-16 13:58:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:44,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:44,813 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:45,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:58:45,024 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-09-16 13:58:45,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:45,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182537899] [2020-09-16 13:58:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:45,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182537899] [2020-09-16 13:58:45,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547977340] [2020-09-16 13:58:45,208 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 [2020-09-16 13:58:45,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:58:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:45,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:45,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:45,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:45,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36152878] [2020-09-16 13:58:45,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:45,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:45,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:45,626 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-16 13:58:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:46,620 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-16 13:58:46,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 13:58:46,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:46,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:46,623 INFO L225 Difference]: With dead ends: 252 [2020-09-16 13:58:46,623 INFO L226 Difference]: Without dead ends: 250 [2020-09-16 13:58:46,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-09-16 13:58:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-16 13:58:46,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-16 13:58:46,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 13:58:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-16 13:58:46,627 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-16 13:58:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:46,628 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-16 13:58:46,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-16 13:58:46,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:46,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:46,628 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:46,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-16 13:58:46,829 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-09-16 13:58:46,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:46,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408001674] [2020-09-16 13:58:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:47,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408001674] [2020-09-16 13:58:47,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619108823] [2020-09-16 13:58:47,020 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 [2020-09-16 13:58:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:47,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:47,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:47,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:47,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:47,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:47,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:47,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648202701] [2020-09-16 13:58:47,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:47,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:58:47,476 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-16 13:58:48,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:58:48,787 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-16 13:58:48,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:58:48,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:58:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:58:48,790 INFO L225 Difference]: With dead ends: 258 [2020-09-16 13:58:48,790 INFO L226 Difference]: Without dead ends: 253 [2020-09-16 13:58:48,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 13:58:48,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-16 13:58:48,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-16 13:58:48,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:58:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:58:48,794 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:58:48,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:58:48,795 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:58:48,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:58:48,795 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:58:48,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:58:48,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:58:48,795 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:58:48,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-16 13:58:48,996 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:58:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:58:48,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-09-16 13:58:48,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:58:48,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563714078] [2020-09-16 13:58:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:58:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:58:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:49,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563714078] [2020-09-16 13:58:49,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706609547] [2020-09-16 13:58:49,190 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 [2020-09-16 13:58:49,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:58:49,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:58:49,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:58:49,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:58:51,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:58:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:58:51,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:58:51,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:58:51,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307907917] [2020-09-16 13:58:51,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:58:51,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:58:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:58:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:58:51,650 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:58:56,278 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-16 13:59:00,687 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-09-16 13:59:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:03,703 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-16 13:59:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:59:03,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:03,705 INFO L225 Difference]: With dead ends: 287 [2020-09-16 13:59:03,705 INFO L226 Difference]: Without dead ends: 279 [2020-09-16 13:59:03,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-09-16 13:59:03,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-16 13:59:03,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-16 13:59:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:59:03,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-16 13:59:03,710 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-16 13:59:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:03,711 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-16 13:59:03,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:03,711 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-16 13:59:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:03,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:03,712 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:03,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-16 13:59:03,913 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:03,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-09-16 13:59:03,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:03,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484749276] [2020-09-16 13:59:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:04,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484749276] [2020-09-16 13:59:04,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824692426] [2020-09-16 13:59:04,124 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 [2020-09-16 13:59:04,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:59:04,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:04,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:04,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:04,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:59:04,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 13:59:04,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:04,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:04,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:04,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753320903] [2020-09-16 13:59:04,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:04,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:04,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:04,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:04,826 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-16 13:59:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:06,408 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-16 13:59:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 13:59:06,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:06,410 INFO L225 Difference]: With dead ends: 260 [2020-09-16 13:59:06,410 INFO L226 Difference]: Without dead ends: 255 [2020-09-16 13:59:06,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 13:59:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-16 13:59:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-16 13:59:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 13:59:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-16 13:59:06,415 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-16 13:59:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:06,415 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-16 13:59:06,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-16 13:59:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:06,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:06,416 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:06,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:06,617 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-09-16 13:59:06,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:06,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887246070] [2020-09-16 13:59:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:06,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887246070] [2020-09-16 13:59:06,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836236127] [2020-09-16 13:59:06,817 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 [2020-09-16 13:59:06,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:59:06,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:06,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:06,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:07,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:07,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:07,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835491113] [2020-09-16 13:59:07,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:07,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:07,288 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-16 13:59:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:08,147 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-16 13:59:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:59:08,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:08,151 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:59:08,151 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:59:08,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:59:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:59:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-16 13:59:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:59:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-16 13:59:08,155 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-16 13:59:08,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:08,155 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-16 13:59:08,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:08,155 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-16 13:59:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:08,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:08,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:08,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:08,357 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-09-16 13:59:08,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:08,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452437812] [2020-09-16 13:59:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:08,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:08,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:08,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452437812] [2020-09-16 13:59:08,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324854667] [2020-09-16 13:59:08,550 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 [2020-09-16 13:59:08,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:59:08,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:08,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:08,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:13,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:13,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:13,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873313808] [2020-09-16 13:59:13,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:13,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:13,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-09-16 13:59:13,753 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-16 13:59:18,254 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:59:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:24,873 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-16 13:59:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:59:24,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:24,876 INFO L225 Difference]: With dead ends: 241 [2020-09-16 13:59:24,876 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 13:59:24,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-09-16 13:59:24,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 13:59:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-16 13:59:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 13:59:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-16 13:59:24,881 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-16 13:59:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:24,881 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-16 13:59:24,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-16 13:59:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:24,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:24,881 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:25,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-16 13:59:25,083 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-09-16 13:59:25,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:25,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809012576] [2020-09-16 13:59:25,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:25,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809012576] [2020-09-16 13:59:25,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546656618] [2020-09-16 13:59:25,297 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 [2020-09-16 13:59:25,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 13:59:25,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:25,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:25,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:25,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:25,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141542984] [2020-09-16 13:59:25,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:25,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:25,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:25,814 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-16 13:59:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:26,492 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-16 13:59:26,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 13:59:26,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:26,494 INFO L225 Difference]: With dead ends: 235 [2020-09-16 13:59:26,494 INFO L226 Difference]: Without dead ends: 233 [2020-09-16 13:59:26,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-09-16 13:59:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-16 13:59:26,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-16 13:59:26,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 13:59:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-16 13:59:26,498 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-16 13:59:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:26,498 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-16 13:59:26,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-16 13:59:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:26,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:26,499 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:26,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:26,699 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-09-16 13:59:26,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:26,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335577876] [2020-09-16 13:59:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:26,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:26,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335577876] [2020-09-16 13:59:26,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332623250] [2020-09-16 13:59:26,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:26,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:26,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:27,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:27,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:27,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801010602] [2020-09-16 13:59:27,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:27,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:27,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:27,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:27,187 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-16 13:59:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:28,093 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-16 13:59:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:59:28,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:28,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:28,095 INFO L225 Difference]: With dead ends: 254 [2020-09-16 13:59:28,095 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 13:59:28,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:59:28,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 13:59:28,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-16 13:59:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 13:59:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-16 13:59:28,098 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-16 13:59:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:28,099 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-16 13:59:28,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-16 13:59:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:28,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:28,099 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:28,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-09-16 13:59:28,300 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-09-16 13:59:28,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:28,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240707473] [2020-09-16 13:59:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:28,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240707473] [2020-09-16 13:59:28,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879418125] [2020-09-16 13:59:28,452 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 [2020-09-16 13:59:28,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 13:59:28,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:28,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:28,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:30,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:30,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:30,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987507935] [2020-09-16 13:59:30,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:30,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:30,307 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-16 13:59:34,778 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 13:59:49,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:49,641 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-16 13:59:49,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 13:59:49,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:49,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:49,643 INFO L225 Difference]: With dead ends: 264 [2020-09-16 13:59:49,643 INFO L226 Difference]: Without dead ends: 262 [2020-09-16 13:59:49,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-09-16 13:59:49,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-16 13:59:49,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-16 13:59:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 13:59:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-16 13:59:49,646 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-16 13:59:49,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:49,647 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-16 13:59:49,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:49,647 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-16 13:59:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:49,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:49,647 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:49,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:49,848 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-09-16 13:59:49,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:49,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485933283] [2020-09-16 13:59:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:49,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485933283] [2020-09-16 13:59:50,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332946695] [2020-09-16 13:59:50,000 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 [2020-09-16 13:59:50,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 13:59:50,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:50,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:50,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:51,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:51,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:51,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660390684] [2020-09-16 13:59:51,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:51,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:51,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:51,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:51,185 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-16 13:59:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:52,081 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-16 13:59:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 13:59:52,082 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:52,083 INFO L225 Difference]: With dead ends: 255 [2020-09-16 13:59:52,083 INFO L226 Difference]: Without dead ends: 253 [2020-09-16 13:59:52,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-09-16 13:59:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-16 13:59:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-16 13:59:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:59:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:59:52,087 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:59:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:52,087 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:59:52,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:59:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:52,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:52,088 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:52,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:52,289 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:52,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-09-16 13:59:52,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:52,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446438307] [2020-09-16 13:59:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:52,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446438307] [2020-09-16 13:59:52,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470206360] [2020-09-16 13:59:52,447 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 13:59:52,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 13:59:52,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:52,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:52,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:52,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:59:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:52,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:52,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:52,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480105803] [2020-09-16 13:59:52,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:52,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:52,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:52,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-16 13:59:52,806 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:59:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 13:59:53,969 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-16 13:59:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 13:59:53,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 13:59:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 13:59:53,970 INFO L225 Difference]: With dead ends: 256 [2020-09-16 13:59:53,971 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 13:59:53,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 13:59:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 13:59:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-16 13:59:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 13:59:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 13:59:53,975 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 13:59:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 13:59:53,975 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 13:59:53,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 13:59:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 13:59:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 13:59:53,975 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 13:59:53,975 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 13:59:54,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-16 13:59:54,176 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 13:59:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 13:59:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-09-16 13:59:54,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 13:59:54,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295191231] [2020-09-16 13:59:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 13:59:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 13:59:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:54,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295191231] [2020-09-16 13:59:54,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060595569] [2020-09-16 13:59:54,337 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 [2020-09-16 13:59:54,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 13:59:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 13:59:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 13:59:54,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 13:59:58,609 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-09-16 13:59:58,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 13:59:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 13:59:58,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 13:59:58,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 13:59:58,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986091594] [2020-09-16 13:59:58,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 13:59:58,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 13:59:58,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 13:59:58,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=185, Unknown=2, NotChecked=0, Total=272 [2020-09-16 13:59:58,798 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 13:59:59,269 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-09-16 14:00:03,898 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-09-16 14:00:05,027 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-09-16 14:00:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:05,415 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-16 14:00:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:00:05,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:05,418 INFO L225 Difference]: With dead ends: 279 [2020-09-16 14:00:05,418 INFO L226 Difference]: Without dead ends: 274 [2020-09-16 14:00:05,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=409, Invalid=921, Unknown=2, NotChecked=0, Total=1332 [2020-09-16 14:00:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-16 14:00:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-16 14:00:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:00:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-16 14:00:05,421 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-16 14:00:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:05,421 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-16 14:00:05,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-16 14:00:05,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:05,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:05,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:05,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-16 14:00:05,623 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:05,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:05,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-09-16 14:00:05,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:05,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409629569] [2020-09-16 14:00:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:05,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409629569] [2020-09-16 14:00:05,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488581152] [2020-09-16 14:00:05,777 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 [2020-09-16 14:00:05,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:00:05,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:05,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:05,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:09,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:09,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:09,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745606390] [2020-09-16 14:00:09,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:09,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-09-16 14:00:09,113 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-16 14:00:13,532 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 14:00:17,797 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 14:00:18,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:18,523 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-16 14:00:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:00:18,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:18,525 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:00:18,525 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:00:18,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-09-16 14:00:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:00:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-16 14:00:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:00:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 14:00:18,530 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 14:00:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:18,530 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 14:00:18,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 14:00:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:18,531 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:18,531 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:18,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-16 14:00:18,739 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:18,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:18,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-09-16 14:00:18,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:18,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480901120] [2020-09-16 14:00:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:18,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480901120] [2020-09-16 14:00:18,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568458976] [2020-09-16 14:00:18,912 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 [2020-09-16 14:00:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:18,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:18,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:25,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:00:25,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:00:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:25,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:25,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:25,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293715113] [2020-09-16 14:00:25,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:25,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=182, Unknown=3, NotChecked=0, Total=272 [2020-09-16 14:00:25,593 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 14:00:29,989 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-16 14:00:34,355 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-16 14:00:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:51,867 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-09-16 14:00:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:00:51,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:51,871 INFO L225 Difference]: With dead ends: 299 [2020-09-16 14:00:51,871 INFO L226 Difference]: Without dead ends: 291 [2020-09-16 14:00:51,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=434, Invalid=965, Unknown=7, NotChecked=0, Total=1406 [2020-09-16 14:00:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-16 14:00:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-09-16 14:00:51,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:00:51,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-16 14:00:51,875 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-16 14:00:51,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:51,876 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-16 14:00:51,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:51,876 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-16 14:00:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:51,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:51,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:52,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-16 14:00:52,078 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-09-16 14:00:52,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:52,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131382739] [2020-09-16 14:00:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:52,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131382739] [2020-09-16 14:00:52,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644738258] [2020-09-16 14:00:52,243 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 [2020-09-16 14:00:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:00:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:54,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:00:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:54,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:54,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:54,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437081056] [2020-09-16 14:00:54,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:54,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:54,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:54,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-16 14:00:54,699 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-16 14:00:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:56,797 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-16 14:00:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:00:56,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:56,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:56,800 INFO L225 Difference]: With dead ends: 292 [2020-09-16 14:00:56,800 INFO L226 Difference]: Without dead ends: 284 [2020-09-16 14:00:56,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-09-16 14:00:56,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-16 14:00:56,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-16 14:00:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:00:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-16 14:00:56,804 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-16 14:00:56,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:56,804 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-16 14:00:56,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:56,804 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-16 14:00:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:56,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:56,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:57,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-16 14:00:57,006 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-09-16 14:00:57,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:57,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808404396] [2020-09-16 14:00:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:57,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808404396] [2020-09-16 14:00:57,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217483213] [2020-09-16 14:00:57,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:00:57,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:00:57,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:57,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:57,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:57,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117442736] [2020-09-16 14:00:57,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:57,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:57,597 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-16 14:00:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:00:58,299 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-16 14:00:58,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:00:58,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:00:58,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:00:58,301 INFO L225 Difference]: With dead ends: 231 [2020-09-16 14:00:58,302 INFO L226 Difference]: Without dead ends: 229 [2020-09-16 14:00:58,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:00:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-16 14:00:58,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-16 14:00:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:00:58,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-16 14:00:58,305 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-16 14:00:58,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:00:58,305 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-16 14:00:58,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:00:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-16 14:00:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:00:58,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:00:58,306 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:00:58,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-09-16 14:00:58,506 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:00:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:00:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-09-16 14:00:58,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:00:58,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428126850] [2020-09-16 14:00:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:00:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:00:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:58,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428126850] [2020-09-16 14:00:58,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885297095] [2020-09-16 14:00:58,696 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 [2020-09-16 14:00:58,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:00:58,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:00:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:00:58,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:00:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:00:59,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:00:59,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:00:59,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043987431] [2020-09-16 14:00:59,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:00:59,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:00:59,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:00:59,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:00:59,128 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-16 14:01:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:00,287 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-16 14:01:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:01:00,289 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:00,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:00,289 INFO L225 Difference]: With dead ends: 250 [2020-09-16 14:01:00,289 INFO L226 Difference]: Without dead ends: 248 [2020-09-16 14:01:00,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:01:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-16 14:01:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-16 14:01:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:01:00,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-16 14:01:00,293 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-16 14:01:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:00,293 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-16 14:01:00,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-16 14:01:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:00,293 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:00,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:00,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:00,495 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:00,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-09-16 14:01:00,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:00,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043490304] [2020-09-16 14:01:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:00,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043490304] [2020-09-16 14:01:00,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586202633] [2020-09-16 14:01:00,668 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 [2020-09-16 14:01:00,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:01,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:01,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:01,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:01,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729356505] [2020-09-16 14:01:01,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:01,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:01,077 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-16 14:01:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:02,863 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-16 14:01:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:02,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:02,865 INFO L225 Difference]: With dead ends: 288 [2020-09-16 14:01:02,865 INFO L226 Difference]: Without dead ends: 283 [2020-09-16 14:01:02,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:01:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-16 14:01:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-16 14:01:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 14:01:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-16 14:01:02,869 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-16 14:01:02,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:02,869 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-16 14:01:02,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-16 14:01:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:02,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:02,870 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:03,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-16 14:01:03,070 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-09-16 14:01:03,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:03,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8988177] [2020-09-16 14:01:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:03,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8988177] [2020-09-16 14:01:03,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155954723] [2020-09-16 14:01:03,241 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 [2020-09-16 14:01:03,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:01:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:03,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:03,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:03,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:03,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402899926] [2020-09-16 14:01:03,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:03,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:03,572 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-16 14:01:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:04,216 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-16 14:01:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:01:04,218 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:04,218 INFO L225 Difference]: With dead ends: 236 [2020-09-16 14:01:04,219 INFO L226 Difference]: Without dead ends: 234 [2020-09-16 14:01:04,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:01:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-16 14:01:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-16 14:01:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:01:04,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:01:04,221 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:01:04,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:04,221 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:01:04,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:04,222 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:01:04,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:04,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:04,222 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:04,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:04,423 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:04,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:04,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-09-16 14:01:04,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:04,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006734557] [2020-09-16 14:01:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:04,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006734557] [2020-09-16 14:01:04,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978961420] [2020-09-16 14:01:04,594 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 [2020-09-16 14:01:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:04,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:04,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:04,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:04,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:04,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745955570] [2020-09-16 14:01:04,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:04,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:04,935 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:01:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:05,604 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-16 14:01:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:01:05,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:05,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:05,607 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:01:05,607 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:01:05,607 INFO L675 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 [2020-09-16 14:01:05,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:01:05,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-16 14:01:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:01:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:01:05,610 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:01:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:05,610 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:01:05,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:01:05,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:05,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:05,611 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:05,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:05,812 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:05,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-09-16 14:01:05,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:05,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013549403] [2020-09-16 14:01:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:05,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013549403] [2020-09-16 14:01:05,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795872962] [2020-09-16 14:01:05,979 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 [2020-09-16 14:01:06,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:06,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:06,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:06,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:06,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:06,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175044405] [2020-09-16 14:01:06,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:06,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:06,353 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:01:06,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:06,950 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-16 14:01:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:01:06,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:06,953 INFO L225 Difference]: With dead ends: 239 [2020-09-16 14:01:06,953 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 14:01:06,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:01:06,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 14:01:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-16 14:01:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:01:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-16 14:01:06,956 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-16 14:01:06,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:06,957 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-16 14:01:06,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-16 14:01:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:06,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:06,957 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:07,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:07,158 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:07,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-09-16 14:01:07,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:07,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759756999] [2020-09-16 14:01:07,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759756999] [2020-09-16 14:01:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958838412] [2020-09-16 14:01:07,333 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 [2020-09-16 14:01:07,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:07,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:07,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:07,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:07,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:07,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:07,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081477770] [2020-09-16 14:01:07,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:07,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:07,677 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-16 14:01:08,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:08,197 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-16 14:01:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:01:08,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:08,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:08,200 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:01:08,200 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:01:08,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:01:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:01:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-16 14:01:08,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 14:01:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-16 14:01:08,203 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-16 14:01:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:08,203 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-16 14:01:08,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-16 14:01:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:08,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:08,204 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:08,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-16 14:01:08,405 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-09-16 14:01:08,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:08,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622534635] [2020-09-16 14:01:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:08,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622534635] [2020-09-16 14:01:08,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213960530] [2020-09-16 14:01:08,572 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 [2020-09-16 14:01:08,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:08,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:08,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:08,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:08,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:08,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:08,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979037182] [2020-09-16 14:01:08,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:08,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:08,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:08,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:08,895 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-16 14:01:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:09,927 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-16 14:01:09,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:09,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:09,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:09,929 INFO L225 Difference]: With dead ends: 261 [2020-09-16 14:01:09,930 INFO L226 Difference]: Without dead ends: 259 [2020-09-16 14:01:09,930 INFO L675 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 [2020-09-16 14:01:09,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-16 14:01:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-16 14:01:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:01:09,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-16 14:01:09,933 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-16 14:01:09,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:09,933 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-16 14:01:09,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:09,933 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-16 14:01:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:09,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:09,934 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:10,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:10,135 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:10,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-09-16 14:01:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:10,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187604328] [2020-09-16 14:01:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:10,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187604328] [2020-09-16 14:01:10,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881898177] [2020-09-16 14:01:10,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:10,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:10,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:10,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:10,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:10,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:10,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:10,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898257428] [2020-09-16 14:01:10,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:10,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:10,664 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-16 14:01:11,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:11,720 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-16 14:01:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:11,722 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:11,722 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:11,723 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:11,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-09-16 14:01:11,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-16 14:01:11,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:01:11,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-16 14:01:11,727 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-16 14:01:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:11,727 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-16 14:01:11,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-16 14:01:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:11,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:11,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:11,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-16 14:01:11,937 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:11,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-09-16 14:01:11,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:11,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975989557] [2020-09-16 14:01:11,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975989557] [2020-09-16 14:01:12,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246684711] [2020-09-16 14:01:12,114 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 [2020-09-16 14:01:12,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:01:12,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:12,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:12,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:12,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:12,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367709419] [2020-09-16 14:01:12,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:12,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:12,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:12,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:12,425 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-16 14:01:13,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:13,313 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-16 14:01:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:01:13,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:13,315 INFO L225 Difference]: With dead ends: 253 [2020-09-16 14:01:13,316 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 14:01:13,316 INFO L675 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 [2020-09-16 14:01:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 14:01:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-16 14:01:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:01:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-16 14:01:13,319 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-16 14:01:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:13,319 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-16 14:01:13,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-16 14:01:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:13,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:13,320 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:13,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-16 14:01:13,521 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-09-16 14:01:13,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:13,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046293725] [2020-09-16 14:01:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:13,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046293725] [2020-09-16 14:01:13,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86498031] [2020-09-16 14:01:13,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:14,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:14,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:14,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779675775] [2020-09-16 14:01:14,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:14,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:14,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:14,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:14,057 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-16 14:01:15,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:15,227 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-16 14:01:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:15,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:15,229 INFO L225 Difference]: With dead ends: 268 [2020-09-16 14:01:15,229 INFO L226 Difference]: Without dead ends: 266 [2020-09-16 14:01:15,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-16 14:01:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-16 14:01:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:01:15,233 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:01:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:15,233 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:01:15,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:01:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:15,234 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:15,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:15,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:15,435 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-09-16 14:01:15,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:15,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929195998] [2020-09-16 14:01:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:15,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929195998] [2020-09-16 14:01:15,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168801991] [2020-09-16 14:01:15,617 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 [2020-09-16 14:01:15,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:15,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:15,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:15,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:15,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863031969] [2020-09-16 14:01:15,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:15,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:15,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:15,954 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:01:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:17,171 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-16 14:01:17,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-16 14:01:17,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:17,173 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:17,173 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:17,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:01:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-16 14:01:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-16 14:01:17,176 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-16 14:01:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:17,177 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-16 14:01:17,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-16 14:01:17,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:17,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:17,177 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:17,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-16 14:01:17,378 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:17,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-09-16 14:01:17,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:17,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930023406] [2020-09-16 14:01:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:17,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930023406] [2020-09-16 14:01:17,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345822813] [2020-09-16 14:01:17,567 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 [2020-09-16 14:01:17,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:17,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:17,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:17,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076135746] [2020-09-16 14:01:17,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:17,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:17,913 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-16 14:01:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:19,129 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-16 14:01:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:19,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:19,132 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:19,132 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:19,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:19,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-16 14:01:19,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:19,136 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:19,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:19,136 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:19,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:19,136 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:19,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:19,137 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:19,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-09-16 14:01:19,337 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:19,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-09-16 14:01:19,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:19,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120787466] [2020-09-16 14:01:19,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:19,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120787466] [2020-09-16 14:01:19,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032694816] [2020-09-16 14:01:19,507 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 [2020-09-16 14:01:19,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:19,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:19,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:19,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:19,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:19,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:19,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931809742] [2020-09-16 14:01:19,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:19,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:19,803 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:20,910 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-16 14:01:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:20,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:20,912 INFO L225 Difference]: With dead ends: 248 [2020-09-16 14:01:20,912 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:01:20,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:01:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:01:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-16 14:01:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:20,915 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:20,915 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:20,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:20,915 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:20,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:20,916 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:21,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:21,117 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-09-16 14:01:21,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:21,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861612603] [2020-09-16 14:01:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:21,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861612603] [2020-09-16 14:01:21,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659775701] [2020-09-16 14:01:21,298 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 [2020-09-16 14:01:21,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:21,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:21,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:21,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:21,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573761532] [2020-09-16 14:01:21,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:21,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:21,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:21,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:21,666 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:23,283 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-16 14:01:23,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:01:23,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:23,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:23,286 INFO L225 Difference]: With dead ends: 287 [2020-09-16 14:01:23,286 INFO L226 Difference]: Without dead ends: 282 [2020-09-16 14:01:23,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-16 14:01:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-16 14:01:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-16 14:01:23,290 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-16 14:01:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:23,290 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-16 14:01:23,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-16 14:01:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:23,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:23,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:23,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:23,491 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-09-16 14:01:23,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:23,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066078181] [2020-09-16 14:01:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:23,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066078181] [2020-09-16 14:01:23,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717420708] [2020-09-16 14:01:23,732 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 [2020-09-16 14:01:23,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-16 14:01:23,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:23,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:24,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:24,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:24,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970146957] [2020-09-16 14:01:24,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:24,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:24,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:24,220 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-16 14:01:25,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:25,654 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-16 14:01:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:01:25,656 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:25,656 INFO L225 Difference]: With dead ends: 284 [2020-09-16 14:01:25,656 INFO L226 Difference]: Without dead ends: 282 [2020-09-16 14:01:25,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-09-16 14:01:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-16 14:01:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-16 14:01:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-16 14:01:25,659 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-16 14:01:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:25,659 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-16 14:01:25,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-16 14:01:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:25,660 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:25,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:25,861 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-09-16 14:01:25,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:25,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333501232] [2020-09-16 14:01:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:26,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333501232] [2020-09-16 14:01:26,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143434023] [2020-09-16 14:01:26,049 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 [2020-09-16 14:01:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:26,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:26,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:26,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:26,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:26,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:26,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196756088] [2020-09-16 14:01:26,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:26,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:26,440 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-16 14:01:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:28,083 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-16 14:01:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:01:28,085 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:28,086 INFO L225 Difference]: With dead ends: 289 [2020-09-16 14:01:28,086 INFO L226 Difference]: Without dead ends: 284 [2020-09-16 14:01:28,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:01:28,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-16 14:01:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-16 14:01:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:01:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-16 14:01:28,090 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-16 14:01:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:28,090 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-16 14:01:28,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-16 14:01:28,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:28,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:28,091 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:28,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:28,291 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:28,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-09-16 14:01:28,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:28,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640631005] [2020-09-16 14:01:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:28,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640631005] [2020-09-16 14:01:28,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128076696] [2020-09-16 14:01:28,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:28,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:28,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:28,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:28,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:28,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:28,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646709414] [2020-09-16 14:01:28,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:28,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:28,808 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-16 14:01:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:30,760 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-16 14:01:30,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:30,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:30,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:30,763 INFO L225 Difference]: With dead ends: 312 [2020-09-16 14:01:30,763 INFO L226 Difference]: Without dead ends: 304 [2020-09-16 14:01:30,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:01:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-16 14:01:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-16 14:01:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:01:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-16 14:01:30,771 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-16 14:01:30,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:30,771 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-16 14:01:30,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-16 14:01:30,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:30,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:30,772 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:30,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:30,973 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:30,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:30,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-09-16 14:01:30,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:30,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992432307] [2020-09-16 14:01:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:30,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:31,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:31,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992432307] [2020-09-16 14:01:31,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336718052] [2020-09-16 14:01:31,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:31,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:31,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:31,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:31,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:31,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:31,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:31,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88355251] [2020-09-16 14:01:31,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:31,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:31,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:31,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:31,491 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-16 14:01:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:32,581 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-16 14:01:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:01:32,583 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:32,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:32,589 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:32,589 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:32,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-16 14:01:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-16 14:01:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:32,593 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:32,593 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:32,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:32,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:32,594 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:32,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-16 14:01:32,802 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:32,802 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-09-16 14:01:32,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:32,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039870340] [2020-09-16 14:01:32,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:32,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039870340] [2020-09-16 14:01:32,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430117655] [2020-09-16 14:01:32,987 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 [2020-09-16 14:01:33,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:33,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:33,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:33,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:33,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:33,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:33,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110023312] [2020-09-16 14:01:33,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:33,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:33,334 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:34,697 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-16 14:01:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:34,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:34,700 INFO L225 Difference]: With dead ends: 271 [2020-09-16 14:01:34,700 INFO L226 Difference]: Without dead ends: 269 [2020-09-16 14:01:34,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:01:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-16 14:01:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-16 14:01:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:01:34,703 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:01:34,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:34,703 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:01:34,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:34,704 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:01:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:34,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:34,704 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:34,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-16 14:01:34,905 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-09-16 14:01:34,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:34,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583898449] [2020-09-16 14:01:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:35,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583898449] [2020-09-16 14:01:35,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979252729] [2020-09-16 14:01:35,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:35,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:35,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:35,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:35,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:35,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508978432] [2020-09-16 14:01:35,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:35,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:35,419 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:01:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:37,063 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-16 14:01:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:37,065 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:37,066 INFO L225 Difference]: With dead ends: 296 [2020-09-16 14:01:37,066 INFO L226 Difference]: Without dead ends: 288 [2020-09-16 14:01:37,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:01:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-16 14:01:37,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-16 14:01:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:01:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-16 14:01:37,070 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-16 14:01:37,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:37,070 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-16 14:01:37,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-16 14:01:37,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:37,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:37,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:37,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-16 14:01:37,272 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:37,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-09-16 14:01:37,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:37,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571324578] [2020-09-16 14:01:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:37,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571324578] [2020-09-16 14:01:37,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202740547] [2020-09-16 14:01:37,485 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:37,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:01:37,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:37,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:37,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:37,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:01:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:37,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:37,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:37,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342432426] [2020-09-16 14:01:37,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:37,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:37,809 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-16 14:01:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:39,322 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-16 14:01:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:01:39,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:39,325 INFO L225 Difference]: With dead ends: 298 [2020-09-16 14:01:39,325 INFO L226 Difference]: Without dead ends: 290 [2020-09-16 14:01:39,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:39,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-16 14:01:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-16 14:01:39,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-16 14:01:39,329 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-16 14:01:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:39,329 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-16 14:01:39,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-16 14:01:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:39,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:39,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:39,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-16 14:01:39,531 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-09-16 14:01:39,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:39,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618869431] [2020-09-16 14:01:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:39,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618869431] [2020-09-16 14:01:39,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573621072] [2020-09-16 14:01:39,734 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 [2020-09-16 14:01:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:40,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:40,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:40,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:40,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772229952] [2020-09-16 14:01:40,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:40,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:40,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:40,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:40,059 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-16 14:01:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:41,774 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-16 14:01:41,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:01:41,776 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:41,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:41,776 INFO L225 Difference]: With dead ends: 291 [2020-09-16 14:01:41,777 INFO L226 Difference]: Without dead ends: 283 [2020-09-16 14:01:41,777 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:01:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-16 14:01:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-16 14:01:41,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:41,781 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:41,781 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:41,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:41,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:41,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:41,781 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:41,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-09-16 14:01:41,982 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:41,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-09-16 14:01:41,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:41,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869366806] [2020-09-16 14:01:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:42,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869366806] [2020-09-16 14:01:42,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227656550] [2020-09-16 14:01:42,182 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 [2020-09-16 14:01:42,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:01:42,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:42,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:42,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:42,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:42,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:42,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895732418] [2020-09-16 14:01:42,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:42,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:42,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:42,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:42,576 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:44,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:44,035 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-16 14:01:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:01:44,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:44,038 INFO L225 Difference]: With dead ends: 265 [2020-09-16 14:01:44,038 INFO L226 Difference]: Without dead ends: 263 [2020-09-16 14:01:44,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:01:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-16 14:01:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-16 14:01:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:44,042 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:44,042 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:44,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:44,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:44,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:44,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:44,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:44,243 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-09-16 14:01:44,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:44,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115194420] [2020-09-16 14:01:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:44,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115194420] [2020-09-16 14:01:44,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712483380] [2020-09-16 14:01:44,448 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 [2020-09-16 14:01:44,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:01:44,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:44,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:44,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:44,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:44,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:44,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122603628] [2020-09-16 14:01:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:44,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:44,855 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-16 14:01:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:46,612 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-16 14:01:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:01:46,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:46,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:46,614 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:01:46,614 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:01:46,615 INFO L675 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 [2020-09-16 14:01:46,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:01:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-16 14:01:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:01:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:01:46,619 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:01:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:46,619 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:01:46,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:01:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:46,619 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:46,619 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:46,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-16 14:01:46,820 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-09-16 14:01:46,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:46,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507548346] [2020-09-16 14:01:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:47,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507548346] [2020-09-16 14:01:47,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218740455] [2020-09-16 14:01:47,029 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 [2020-09-16 14:01:47,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:01:47,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:47,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:47,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:47,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:47,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:01:47,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601755329] [2020-09-16 14:01:47,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:01:47,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:01:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:01:47,449 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:01:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:01:50,015 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-16 14:01:50,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:01:50,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:01:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:01:50,018 INFO L225 Difference]: With dead ends: 285 [2020-09-16 14:01:50,018 INFO L226 Difference]: Without dead ends: 280 [2020-09-16 14:01:50,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:01:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-16 14:01:50,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-16 14:01:50,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:01:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-16 14:01:50,022 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-16 14:01:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:01:50,022 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-16 14:01:50,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:01:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-16 14:01:50,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:01:50,022 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:01:50,023 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:01:50,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:01:50,223 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:01:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:01:50,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-09-16 14:01:50,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:01:50,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014674871] [2020-09-16 14:01:50,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:01:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:01:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:50,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014674871] [2020-09-16 14:01:50,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442327475] [2020-09-16 14:01:50,440 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 [2020-09-16 14:01:50,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:01:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:01:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:01:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:01:54,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:01:58,555 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-16 14:01:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:01:58,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:01:58,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 14:01:58,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141894222] [2020-09-16 14:01:58,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:01:58,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:01:58,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:01:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-09-16 14:01:58,558 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-16 14:02:02,787 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-16 14:02:07,444 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-16 14:02:07,944 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-09-16 14:02:14,435 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-09-16 14:02:16,666 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-16 14:02:35,750 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-16 14:02:40,181 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-16 14:03:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:12,962 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-16 14:03:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:03:12,964 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-16 14:03:12,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:12,965 INFO L225 Difference]: With dead ends: 302 [2020-09-16 14:03:12,965 INFO L226 Difference]: Without dead ends: 297 [2020-09-16 14:03:12,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 55.6s TimeCoverageRelationStatistics Valid=559, Invalid=1408, Unknown=13, NotChecked=0, Total=1980 [2020-09-16 14:03:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-16 14:03:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-16 14:03:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:03:12,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-16 14:03:12,968 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-16 14:03:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:12,968 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-16 14:03:12,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:03:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-16 14:03:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:12,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:12,969 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:13,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:13,169 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:13,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-09-16 14:03:13,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:13,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416254161] [2020-09-16 14:03:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416254161] [2020-09-16 14:03:13,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170934216] [2020-09-16 14:03:13,358 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 [2020-09-16 14:03:13,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:13,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:13,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:13,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:13,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:13,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:13,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116963378] [2020-09-16 14:03:13,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:13,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:13,685 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-16 14:03:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:14,292 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-16 14:03:14,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:03:14,294 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:14,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:14,295 INFO L225 Difference]: With dead ends: 219 [2020-09-16 14:03:14,295 INFO L226 Difference]: Without dead ends: 217 [2020-09-16 14:03:14,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:03:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-16 14:03:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-16 14:03:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:03:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-16 14:03:14,298 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-16 14:03:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:14,299 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-16 14:03:14,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-16 14:03:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:14,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:14,299 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:14,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:14,500 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:14,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-09-16 14:03:14,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:14,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217469761] [2020-09-16 14:03:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:14,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217469761] [2020-09-16 14:03:14,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669006972] [2020-09-16 14:03:14,688 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 [2020-09-16 14:03:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:14,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:14,954 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:03:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:14,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:14,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:14,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730775034] [2020-09-16 14:03:14,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:14,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:14,980 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-16 14:03:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:15,705 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-16 14:03:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:03:15,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:15,708 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:15,708 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 14:03:15,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:15,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 14:03:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-16 14:03:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-16 14:03:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-16 14:03:15,712 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-16 14:03:15,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:15,712 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-16 14:03:15,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-16 14:03:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:15,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:15,712 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:15,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-16 14:03:15,913 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-09-16 14:03:15,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:15,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394867127] [2020-09-16 14:03:15,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:16,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394867127] [2020-09-16 14:03:16,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696595629] [2020-09-16 14:03:16,107 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 [2020-09-16 14:03:16,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:16,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:16,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:16,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:16,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:16,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:16,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628157727] [2020-09-16 14:03:16,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:16,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:16,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:16,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:16,443 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-16 14:03:16,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:16,996 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-16 14:03:16,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:16,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:16,998 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:16,998 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:03:16,999 INFO L675 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 [2020-09-16 14:03:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:03:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-16 14:03:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-16 14:03:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-16 14:03:17,002 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-16 14:03:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:17,002 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-16 14:03:17,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-16 14:03:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:17,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:17,003 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:17,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-16 14:03:17,204 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:17,204 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-09-16 14:03:17,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:17,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738976414] [2020-09-16 14:03:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:17,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738976414] [2020-09-16 14:03:17,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481296616] [2020-09-16 14:03:17,402 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 [2020-09-16 14:03:17,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:03:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:17,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:17,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85007148] [2020-09-16 14:03:17,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:17,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:17,763 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-16 14:03:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:18,414 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-09-16 14:03:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:18,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:18,417 INFO L225 Difference]: With dead ends: 237 [2020-09-16 14:03:18,417 INFO L226 Difference]: Without dead ends: 235 [2020-09-16 14:03:18,417 INFO L675 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 [2020-09-16 14:03:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-16 14:03:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-09-16 14:03:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 14:03:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-16 14:03:18,421 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-16 14:03:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:18,421 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-16 14:03:18,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-16 14:03:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:18,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:18,422 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:18,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-16 14:03:18,625 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-09-16 14:03:18,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:18,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774850293] [2020-09-16 14:03:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:18,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774850293] [2020-09-16 14:03:18,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582047820] [2020-09-16 14:03:18,830 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 [2020-09-16 14:03:18,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:18,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:19,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:19,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:19,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209413189] [2020-09-16 14:03:19,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:19,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:19,345 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-16 14:03:20,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:20,285 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-16 14:03:20,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:03:20,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:20,287 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:03:20,287 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:03:20,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:03:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-09-16 14:03:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:03:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-16 14:03:20,294 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-16 14:03:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:20,295 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-16 14:03:20,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-16 14:03:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:20,295 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:20,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-16 14:03:20,496 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-09-16 14:03:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:20,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401441960] [2020-09-16 14:03:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:20,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401441960] [2020-09-16 14:03:20,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301548127] [2020-09-16 14:03:20,711 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 [2020-09-16 14:03:20,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:03:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:20,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:21,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:21,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:21,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240430034] [2020-09-16 14:03:21,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:21,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:21,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:21,073 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-16 14:03:21,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:21,736 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-09-16 14:03:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:03:21,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:21,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:21,738 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:03:21,738 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:03:21,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:03:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:03:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-09-16 14:03:21,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:03:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-16 14:03:21,743 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-16 14:03:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:21,743 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-16 14:03:21,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-16 14:03:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:21,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:21,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:21,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-16 14:03:21,948 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:21,949 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-09-16 14:03:21,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:21,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081299378] [2020-09-16 14:03:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:22,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081299378] [2020-09-16 14:03:22,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768675787] [2020-09-16 14:03:22,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:22,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:22,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:22,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:22,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:22,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:22,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127306696] [2020-09-16 14:03:22,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:22,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:22,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:22,548 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-16 14:03:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:23,162 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-09-16 14:03:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:23,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:23,165 INFO L225 Difference]: With dead ends: 239 [2020-09-16 14:03:23,165 INFO L226 Difference]: Without dead ends: 237 [2020-09-16 14:03:23,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:03:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-16 14:03:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-09-16 14:03:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:03:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-16 14:03:23,168 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-16 14:03:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:23,168 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-16 14:03:23,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-16 14:03:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:23,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:23,169 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:23,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-16 14:03:23,370 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-09-16 14:03:23,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:23,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445933383] [2020-09-16 14:03:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:23,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445933383] [2020-09-16 14:03:23,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809562717] [2020-09-16 14:03:23,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:23,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:23,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:23,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:23,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:23,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321041659] [2020-09-16 14:03:23,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:23,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:23,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:23,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:23,994 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-16 14:03:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:24,441 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-09-16 14:03:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:03:24,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:24,444 INFO L225 Difference]: With dead ends: 220 [2020-09-16 14:03:24,444 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:03:24,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:03:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:03:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-09-16 14:03:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 14:03:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-16 14:03:24,447 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-16 14:03:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:24,447 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-16 14:03:24,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-16 14:03:24,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:24,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:24,448 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:24,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-16 14:03:24,649 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-09-16 14:03:24,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:24,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855767387] [2020-09-16 14:03:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:24,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855767387] [2020-09-16 14:03:24,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59855727] [2020-09-16 14:03:24,844 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 [2020-09-16 14:03:24,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:24,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:24,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:25,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:25,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:25,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612109416] [2020-09-16 14:03:25,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:25,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:25,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:25,221 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-16 14:03:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:25,817 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-16 14:03:25,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:25,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:25,819 INFO L225 Difference]: With dead ends: 229 [2020-09-16 14:03:25,819 INFO L226 Difference]: Without dead ends: 227 [2020-09-16 14:03:25,824 INFO L675 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 [2020-09-16 14:03:25,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-16 14:03:25,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-16 14:03:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-16 14:03:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-16 14:03:25,827 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-16 14:03:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:25,828 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-16 14:03:25,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-16 14:03:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:25,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:25,828 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:26,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-09-16 14:03:26,034 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-09-16 14:03:26,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:26,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279242484] [2020-09-16 14:03:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:26,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279242484] [2020-09-16 14:03:26,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140992956] [2020-09-16 14:03:26,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:26,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:03:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:26,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:26,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:26,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:26,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773974129] [2020-09-16 14:03:26,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:26,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:26,641 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-16 14:03:27,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:27,322 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-09-16 14:03:27,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:03:27,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:27,324 INFO L225 Difference]: With dead ends: 233 [2020-09-16 14:03:27,324 INFO L226 Difference]: Without dead ends: 231 [2020-09-16 14:03:27,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:03:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-16 14:03:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-09-16 14:03:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-16 14:03:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-16 14:03:27,327 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-16 14:03:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:27,327 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-16 14:03:27,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-16 14:03:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:27,328 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:27,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:27,529 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:27,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:27,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-09-16 14:03:27,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:27,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431801708] [2020-09-16 14:03:27,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:27,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431801708] [2020-09-16 14:03:27,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712386478] [2020-09-16 14:03:27,723 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 [2020-09-16 14:03:27,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:27,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:27,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:27,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:30,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:30,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:30,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871467078] [2020-09-16 14:03:30,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:30,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:30,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:30,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:30,166 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-16 14:03:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:31,273 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-09-16 14:03:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:03:31,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:31,276 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:03:31,276 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:03:31,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:03:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:03:31,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-09-16 14:03:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-16 14:03:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-16 14:03:31,280 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-16 14:03:31,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:31,280 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-16 14:03:31,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:31,280 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-16 14:03:31,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:31,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:31,281 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:31,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:31,481 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:31,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:31,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-09-16 14:03:31,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:31,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120090890] [2020-09-16 14:03:31,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:31,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120090890] [2020-09-16 14:03:31,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700791715] [2020-09-16 14:03:31,672 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 [2020-09-16 14:03:31,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:03:31,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:32,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:32,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:32,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564351672] [2020-09-16 14:03:32,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:32,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:32,029 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-16 14:03:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:32,801 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-16 14:03:32,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:03:32,803 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:32,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:32,804 INFO L225 Difference]: With dead ends: 246 [2020-09-16 14:03:32,804 INFO L226 Difference]: Without dead ends: 244 [2020-09-16 14:03:32,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-16 14:03:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-09-16 14:03:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-16 14:03:32,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-16 14:03:32,807 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-16 14:03:32,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:32,807 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-16 14:03:32,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:32,807 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-16 14:03:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:32,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:32,808 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:33,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:33,009 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-09-16 14:03:33,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:33,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193927249] [2020-09-16 14:03:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:33,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193927249] [2020-09-16 14:03:33,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586327078] [2020-09-16 14:03:33,210 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 [2020-09-16 14:03:33,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:03:33,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:33,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:33,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:33,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:33,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816252705] [2020-09-16 14:03:33,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:33,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:33,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:33,587 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-16 14:03:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:34,392 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-09-16 14:03:34,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:03:34,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:34,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:34,396 INFO L225 Difference]: With dead ends: 250 [2020-09-16 14:03:34,396 INFO L226 Difference]: Without dead ends: 248 [2020-09-16 14:03:34,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:03:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-16 14:03:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-09-16 14:03:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:03:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-16 14:03:34,399 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-16 14:03:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:34,399 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-16 14:03:34,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-16 14:03:34,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:34,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:34,400 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:34,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-16 14:03:34,601 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:34,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:34,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-09-16 14:03:34,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:34,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518700623] [2020-09-16 14:03:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:34,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518700623] [2020-09-16 14:03:34,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764026731] [2020-09-16 14:03:34,793 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 [2020-09-16 14:03:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:34,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:34,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:35,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:35,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:35,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914502820] [2020-09-16 14:03:35,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:35,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:35,172 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-16 14:03:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:35,978 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-09-16 14:03:35,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-16 14:03:35,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:35,981 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:03:35,982 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:03:35,982 INFO L675 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 [2020-09-16 14:03:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:03:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-09-16 14:03:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:03:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-16 14:03:35,985 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-16 14:03:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:35,985 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-16 14:03:35,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-16 14:03:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:35,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:35,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:36,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:36,186 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-09-16 14:03:36,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:36,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947971887] [2020-09-16 14:03:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:36,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947971887] [2020-09-16 14:03:36,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926726488] [2020-09-16 14:03:36,374 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 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 [2020-09-16 14:03:36,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:36,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:36,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:36,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:36,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:36,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:36,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583991816] [2020-09-16 14:03:36,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:36,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:36,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:36,857 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-16 14:03:38,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:38,057 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-09-16 14:03:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:03:38,059 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:38,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:38,060 INFO L225 Difference]: With dead ends: 262 [2020-09-16 14:03:38,060 INFO L226 Difference]: Without dead ends: 260 [2020-09-16 14:03:38,060 INFO L675 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 [2020-09-16 14:03:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-16 14:03:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-09-16 14:03:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:03:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-16 14:03:38,064 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-16 14:03:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:38,064 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-16 14:03:38,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-16 14:03:38,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:38,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:38,065 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:38,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-16 14:03:38,266 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:38,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:38,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-09-16 14:03:38,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:38,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613191931] [2020-09-16 14:03:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:38,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613191931] [2020-09-16 14:03:38,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146959458] [2020-09-16 14:03:38,458 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 [2020-09-16 14:03:38,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:03:38,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:38,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:38,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:38,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:38,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:38,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652177769] [2020-09-16 14:03:38,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:38,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:38,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:38,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:38,862 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-16 14:03:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:39,874 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-09-16 14:03:39,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:03:39,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:39,877 INFO L225 Difference]: With dead ends: 254 [2020-09-16 14:03:39,877 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 14:03:39,877 INFO L675 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 [2020-09-16 14:03:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 14:03:39,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-09-16 14:03:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:03:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-16 14:03:39,885 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-16 14:03:39,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:39,885 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-16 14:03:39,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-16 14:03:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:39,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:39,886 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:40,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-16 14:03:40,087 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:40,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:40,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-09-16 14:03:40,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:40,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209582527] [2020-09-16 14:03:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:40,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209582527] [2020-09-16 14:03:40,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589442867] [2020-09-16 14:03:40,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:03:40,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:40,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:40,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:40,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:40,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:40,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:40,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894406305] [2020-09-16 14:03:40,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:40,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:40,812 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-16 14:03:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:41,805 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-09-16 14:03:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:03:41,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:41,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:41,808 INFO L225 Difference]: With dead ends: 248 [2020-09-16 14:03:41,808 INFO L226 Difference]: Without dead ends: 246 [2020-09-16 14:03:41,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:03:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-16 14:03:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-09-16 14:03:41,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:03:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:03:41,811 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:03:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:41,811 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:03:41,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:03:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:41,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:41,812 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:42,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:42,013 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-09-16 14:03:42,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:42,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780144725] [2020-09-16 14:03:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:42,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780144725] [2020-09-16 14:03:42,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273739955] [2020-09-16 14:03:42,209 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 [2020-09-16 14:03:42,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:03:42,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:42,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:42,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:42,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:42,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938206994] [2020-09-16 14:03:42,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:42,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:42,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:42,561 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:03:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:43,645 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-09-16 14:03:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-16 14:03:43,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:43,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:43,648 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:03:43,648 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:03:43,649 INFO L675 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 [2020-09-16 14:03:43,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:03:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-09-16 14:03:43,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:03:43,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:03:43,653 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:03:43,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:43,653 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:03:43,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:03:43,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:43,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:43,654 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:43,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:43,863 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:43,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-09-16 14:03:43,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:43,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417341253] [2020-09-16 14:03:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:44,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417341253] [2020-09-16 14:03:44,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402180739] [2020-09-16 14:03:44,060 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 [2020-09-16 14:03:44,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:44,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:44,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:44,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:03:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:44,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:44,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:44,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614394813] [2020-09-16 14:03:44,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:44,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:44,373 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:03:45,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:45,101 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-09-16 14:03:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:03:45,103 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:45,104 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:03:45,104 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:03:45,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:03:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:03:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-09-16 14:03:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:03:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:03:45,108 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:03:45,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:45,108 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:03:45,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:03:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:45,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:45,108 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:45,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-16 14:03:45,309 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:45,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-09-16 14:03:45,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:45,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415492304] [2020-09-16 14:03:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:45,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415492304] [2020-09-16 14:03:45,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370207682] [2020-09-16 14:03:45,510 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 [2020-09-16 14:03:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:45,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:03:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:45,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:45,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:45,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707333920] [2020-09-16 14:03:45,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:45,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:45,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:45,897 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:03:47,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:47,352 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-09-16 14:03:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:03:47,355 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:47,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:47,356 INFO L225 Difference]: With dead ends: 286 [2020-09-16 14:03:47,357 INFO L226 Difference]: Without dead ends: 281 [2020-09-16 14:03:47,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:03:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-16 14:03:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-09-16 14:03:47,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:03:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-16 14:03:47,362 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-16 14:03:47,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:47,362 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-16 14:03:47,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:47,362 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-16 14:03:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:47,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:47,363 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:47,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:47,574 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:47,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-09-16 14:03:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:47,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058056303] [2020-09-16 14:03:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:47,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058056303] [2020-09-16 14:03:47,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984451121] [2020-09-16 14:03:47,767 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 [2020-09-16 14:03:47,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:03:47,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:47,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:47,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:48,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:48,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:48,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:48,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036963068] [2020-09-16 14:03:48,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:48,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:48,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:48,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:48,214 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-16 14:03:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:49,455 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-09-16 14:03:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-16 14:03:49,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:49,457 INFO L225 Difference]: With dead ends: 268 [2020-09-16 14:03:49,457 INFO L226 Difference]: Without dead ends: 266 [2020-09-16 14:03:49,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-09-16 14:03:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-16 14:03:49,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-09-16 14:03:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:03:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:03:49,461 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:03:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:49,461 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:03:49,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:03:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:49,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:49,462 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:49,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-09-16 14:03:49,663 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-09-16 14:03:49,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:49,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932278900] [2020-09-16 14:03:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:49,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932278900] [2020-09-16 14:03:49,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120175950] [2020-09-16 14:03:49,873 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 [2020-09-16 14:03:49,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:03:49,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:49,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:49,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:50,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:03:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:50,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:50,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:50,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458820622] [2020-09-16 14:03:50,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:50,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:50,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:50,298 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:03:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:52,054 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-09-16 14:03:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:03:52,056 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:52,057 INFO L225 Difference]: With dead ends: 296 [2020-09-16 14:03:52,057 INFO L226 Difference]: Without dead ends: 291 [2020-09-16 14:03:52,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:03:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-16 14:03:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-09-16 14:03:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:03:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-16 14:03:52,060 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-16 14:03:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:52,061 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-16 14:03:52,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-16 14:03:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:52,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:52,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:52,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:52,263 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:52,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:52,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-09-16 14:03:52,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:52,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767909889] [2020-09-16 14:03:52,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:52,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767909889] [2020-09-16 14:03:52,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333582037] [2020-09-16 14:03:52,485 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 [2020-09-16 14:03:52,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:03:52,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:52,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:52,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:52,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:03:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:52,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:52,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:52,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130425298] [2020-09-16 14:03:52,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:52,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:52,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:52,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:52,889 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-16 14:03:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:54,618 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-09-16 14:03:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:03:54,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:54,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:54,621 INFO L225 Difference]: With dead ends: 299 [2020-09-16 14:03:54,621 INFO L226 Difference]: Without dead ends: 294 [2020-09-16 14:03:54,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-09-16 14:03:54,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-16 14:03:54,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-09-16 14:03:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-16 14:03:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-16 14:03:54,625 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-16 14:03:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:54,625 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-16 14:03:54,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-16 14:03:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:54,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:54,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:54,827 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:54,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-09-16 14:03:54,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:54,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678536952] [2020-09-16 14:03:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:54,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:55,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678536952] [2020-09-16 14:03:55,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634723828] [2020-09-16 14:03:55,052 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 [2020-09-16 14:03:55,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:03:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:55,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:55,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:55,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:55,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:55,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362181904] [2020-09-16 14:03:55,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:55,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:55,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:55,581 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-16 14:03:57,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:57,149 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-09-16 14:03:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:03:57,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:57,153 INFO L225 Difference]: With dead ends: 274 [2020-09-16 14:03:57,153 INFO L226 Difference]: Without dead ends: 272 [2020-09-16 14:03:57,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-09-16 14:03:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-16 14:03:57,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-09-16 14:03:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:03:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-16 14:03:57,157 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-16 14:03:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:57,158 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-16 14:03:57,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-16 14:03:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:57,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:57,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:03:57,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:03:57,368 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:03:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:03:57,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-09-16 14:03:57,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:03:57,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237919599] [2020-09-16 14:03:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:03:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:03:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:57,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237919599] [2020-09-16 14:03:57,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039933005] [2020-09-16 14:03:57,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:03:57,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:03:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:03:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:03:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:03:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:03:58,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:03:58,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:03:58,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726227227] [2020-09-16 14:03:58,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:03:58,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:03:58,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:03:58,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:03:58,048 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-16 14:03:59,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:03:59,817 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-09-16 14:03:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-16 14:03:59,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:03:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:03:59,821 INFO L225 Difference]: With dead ends: 282 [2020-09-16 14:03:59,822 INFO L226 Difference]: Without dead ends: 280 [2020-09-16 14:03:59,822 INFO L675 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 [2020-09-16 14:03:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-16 14:03:59,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-09-16 14:03:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:03:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-16 14:03:59,826 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-16 14:03:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:03:59,826 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-16 14:03:59,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:03:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-16 14:03:59,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:03:59,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:03:59,827 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:00,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-16 14:04:00,030 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:00,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-09-16 14:04:00,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:00,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562927768] [2020-09-16 14:04:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562927768] [2020-09-16 14:04:00,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670721093] [2020-09-16 14:04:00,249 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 [2020-09-16 14:04:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:00,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:00,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:00,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:00,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:00,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:00,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952204044] [2020-09-16 14:04:00,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:00,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:00,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:00,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:00,708 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-16 14:04:02,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:02,980 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-09-16 14:04:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:04:02,983 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:02,984 INFO L225 Difference]: With dead ends: 321 [2020-09-16 14:04:02,984 INFO L226 Difference]: Without dead ends: 313 [2020-09-16 14:04:02,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-09-16 14:04:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-16 14:04:02,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-09-16 14:04:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:04:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-16 14:04:02,988 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-16 14:04:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-16 14:04:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:02,988 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-16 14:04:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:02,988 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:02,988 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:03,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-16 14:04:03,192 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-09-16 14:04:03,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:03,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559084085] [2020-09-16 14:04:03,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:03,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559084085] [2020-09-16 14:04:03,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003274025] [2020-09-16 14:04:03,422 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 [2020-09-16 14:04:03,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:04:03,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:07,968 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:08,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:08,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:08,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63944158] [2020-09-16 14:04:08,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:08,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:08,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-09-16 14:04:08,042 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-16 14:04:12,904 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-16 14:04:17,090 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-16 14:04:21,419 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-16 14:04:25,759 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-16 14:04:27,873 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-16 14:04:32,544 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-16 14:04:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:33,538 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-09-16 14:04:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:04:33,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:33,542 INFO L225 Difference]: With dead ends: 323 [2020-09-16 14:04:33,542 INFO L226 Difference]: Without dead ends: 315 [2020-09-16 14:04:33,542 INFO L675 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 [2020-09-16 14:04:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-16 14:04:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-09-16 14:04:33,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-16 14:04:33,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-16 14:04:33,545 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-16 14:04:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:33,546 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-16 14:04:33,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:33,546 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-16 14:04:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:33,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:33,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:33,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-16 14:04:33,747 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:33,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:33,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 225 times [2020-09-16 14:04:33,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:33,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351682180] [2020-09-16 14:04:33,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351682180] [2020-09-16 14:04:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770933319] [2020-09-16 14:04:33,979 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 [2020-09-16 14:04:34,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:04:34,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:34,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:34,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:34,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:04:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:34,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:34,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:34,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255693030] [2020-09-16 14:04:34,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:34,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:34,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:34,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:34,446 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-16 14:04:37,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:37,144 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-09-16 14:04:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:04:37,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:37,148 INFO L225 Difference]: With dead ends: 320 [2020-09-16 14:04:37,148 INFO L226 Difference]: Without dead ends: 312 [2020-09-16 14:04:37,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-16 14:04:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-16 14:04:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-09-16 14:04:37,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:04:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-16 14:04:37,151 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-16 14:04:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:37,151 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-16 14:04:37,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-16 14:04:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:37,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:37,152 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:37,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-16 14:04:37,356 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 226 times [2020-09-16 14:04:37,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:37,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385334618] [2020-09-16 14:04:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:37,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385334618] [2020-09-16 14:04:37,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567248071] [2020-09-16 14:04:37,572 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 [2020-09-16 14:04:37,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:04:37,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:37,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:37,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:37,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:37,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156732724] [2020-09-16 14:04:37,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:37,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:37,981 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-16 14:04:38,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:38,973 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-09-16 14:04:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-16 14:04:38,975 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:38,976 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:04:38,976 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:04:38,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:04:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:04:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-09-16 14:04:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:04:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-16 14:04:38,984 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-16 14:04:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:38,985 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-16 14:04:38,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-16 14:04:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:38,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:38,985 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:39,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-16 14:04:39,186 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:39,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 227 times [2020-09-16 14:04:39,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:39,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23315782] [2020-09-16 14:04:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:39,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23315782] [2020-09-16 14:04:39,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776552295] [2020-09-16 14:04:39,398 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 [2020-09-16 14:04:39,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:04:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:39,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:39,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:39,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513647646] [2020-09-16 14:04:39,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:39,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:39,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:39,866 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-16 14:04:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:41,431 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-09-16 14:04:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:04:41,433 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:41,434 INFO L225 Difference]: With dead ends: 294 [2020-09-16 14:04:41,434 INFO L226 Difference]: Without dead ends: 292 [2020-09-16 14:04:41,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-09-16 14:04:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-16 14:04:41,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-09-16 14:04:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:04:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-16 14:04:41,437 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-16 14:04:41,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:41,437 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-16 14:04:41,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-16 14:04:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:41,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:41,438 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:41,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:41,639 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:41,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:41,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 228 times [2020-09-16 14:04:41,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:41,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521732845] [2020-09-16 14:04:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:41,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521732845] [2020-09-16 14:04:41,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856035781] [2020-09-16 14:04:41,861 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 [2020-09-16 14:04:41,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:04:41,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:41,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:41,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:42,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:42,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:42,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362696477] [2020-09-16 14:04:42,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:42,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:42,249 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-16 14:04:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:43,551 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-16 14:04:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-16 14:04:43,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:43,555 INFO L225 Difference]: With dead ends: 266 [2020-09-16 14:04:43,555 INFO L226 Difference]: Without dead ends: 264 [2020-09-16 14:04:43,555 INFO L675 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 [2020-09-16 14:04:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-16 14:04:43,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-16 14:04:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:04:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-16 14:04:43,558 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-16 14:04:43,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:43,558 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-16 14:04:43,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:43,558 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-16 14:04:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:43,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:43,559 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:43,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:43,760 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:43,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 229 times [2020-09-16 14:04:43,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:43,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121593142] [2020-09-16 14:04:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:43,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121593142] [2020-09-16 14:04:43,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741426106] [2020-09-16 14:04:43,976 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 [2020-09-16 14:04:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:44,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:44,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:44,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:44,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410955002] [2020-09-16 14:04:44,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:44,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:44,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:44,384 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-16 14:04:46,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:46,079 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-09-16 14:04:46,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:04:46,081 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:46,082 INFO L225 Difference]: With dead ends: 275 [2020-09-16 14:04:46,082 INFO L226 Difference]: Without dead ends: 273 [2020-09-16 14:04:46,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:04:46,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-16 14:04:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-09-16 14:04:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:04:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:04:46,085 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:04:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:46,085 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:04:46,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:04:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:46,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:46,086 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:46,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:46,287 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:46,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:46,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 230 times [2020-09-16 14:04:46,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:46,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799751816] [2020-09-16 14:04:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:46,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799751816] [2020-09-16 14:04:46,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493637547] [2020-09-16 14:04:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:04:46,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:04:46,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:46,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:46,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:46,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:46,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:46,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84622394] [2020-09-16 14:04:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:46,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:46,881 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:04:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:48,514 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-09-16 14:04:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-16 14:04:48,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:48,517 INFO L225 Difference]: With dead ends: 285 [2020-09-16 14:04:48,517 INFO L226 Difference]: Without dead ends: 277 [2020-09-16 14:04:48,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-09-16 14:04:48,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-16 14:04:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-09-16 14:04:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:04:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:04:48,521 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:04:48,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:48,522 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:04:48,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:04:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:48,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:48,522 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:48,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-09-16 14:04:48,726 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 231 times [2020-09-16 14:04:48,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:48,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352423124] [2020-09-16 14:04:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:48,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352423124] [2020-09-16 14:04:48,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855893472] [2020-09-16 14:04:48,957 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 [2020-09-16 14:04:49,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:04:49,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:49,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:49,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:49,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:04:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:49,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:49,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:49,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128898164] [2020-09-16 14:04:49,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:49,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:49,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:49,417 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:04:51,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:51,435 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-09-16 14:04:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:04:51,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:51,438 INFO L225 Difference]: With dead ends: 307 [2020-09-16 14:04:51,439 INFO L226 Difference]: Without dead ends: 299 [2020-09-16 14:04:51,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:04:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-16 14:04:51,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-09-16 14:04:51,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:04:51,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-16 14:04:51,442 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-16 14:04:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:51,442 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-16 14:04:51,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-16 14:04:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:51,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:51,443 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:51,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:51,645 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 232 times [2020-09-16 14:04:51,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:51,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089381884] [2020-09-16 14:04:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089381884] [2020-09-16 14:04:51,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492508589] [2020-09-16 14:04:51,865 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 [2020-09-16 14:04:51,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:04:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:51,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:51,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:52,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:52,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:52,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332272436] [2020-09-16 14:04:52,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:52,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:52,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:52,247 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-16 14:04:53,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:53,762 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-09-16 14:04:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-16 14:04:53,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:53,766 INFO L225 Difference]: With dead ends: 280 [2020-09-16 14:04:53,766 INFO L226 Difference]: Without dead ends: 278 [2020-09-16 14:04:53,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-16 14:04:53,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-16 14:04:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-16 14:04:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-16 14:04:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-16 14:04:53,769 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-16 14:04:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:53,769 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-16 14:04:53,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-16 14:04:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:53,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:53,770 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:53,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-16 14:04:53,971 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:53,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 233 times [2020-09-16 14:04:53,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:53,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122274936] [2020-09-16 14:04:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:54,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122274936] [2020-09-16 14:04:54,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478361615] [2020-09-16 14:04:54,208 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 [2020-09-16 14:04:54,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:04:54,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:54,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:54,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:54,540 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:04:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:54,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:54,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:54,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776841955] [2020-09-16 14:04:54,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:54,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:54,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:54,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:54,564 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-16 14:04:56,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:56,324 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-09-16 14:04:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-16 14:04:56,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:56,327 INFO L225 Difference]: With dead ends: 315 [2020-09-16 14:04:56,327 INFO L226 Difference]: Without dead ends: 307 [2020-09-16 14:04:56,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-16 14:04:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-16 14:04:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-09-16 14:04:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-16 14:04:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-16 14:04:56,331 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-16 14:04:56,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:56,331 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-16 14:04:56,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-16 14:04:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:56,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:56,332 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:56,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:04:56,532 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 234 times [2020-09-16 14:04:56,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:56,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279258500] [2020-09-16 14:04:56,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:56,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279258500] [2020-09-16 14:04:56,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747926568] [2020-09-16 14:04:56,769 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 [2020-09-16 14:04:56,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:04:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:04:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:04:57,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:04:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:57,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:04:57,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:04:57,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995907771] [2020-09-16 14:04:57,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:04:57,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:04:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:04:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:04:57,154 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-16 14:04:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:04:59,226 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-09-16 14:04:59,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:04:59,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:04:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:04:59,230 INFO L225 Difference]: With dead ends: 312 [2020-09-16 14:04:59,230 INFO L226 Difference]: Without dead ends: 304 [2020-09-16 14:04:59,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:04:59,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-16 14:04:59,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-09-16 14:04:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-16 14:04:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-16 14:04:59,239 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-16 14:04:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:04:59,239 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-16 14:04:59,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:04:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-16 14:04:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:04:59,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:04:59,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:04:59,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-16 14:04:59,440 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:04:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:04:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 235 times [2020-09-16 14:04:59,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:04:59,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476608275] [2020-09-16 14:04:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:04:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:59,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:04:59,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476608275] [2020-09-16 14:04:59,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548924036] [2020-09-16 14:04:59,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:04:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:04:59,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:04:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:00,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:00,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:00,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:00,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326626412] [2020-09-16 14:05:00,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:00,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:00,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:00,068 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-16 14:05:02,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:02,485 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-09-16 14:05:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-16 14:05:02,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:02,488 INFO L225 Difference]: With dead ends: 307 [2020-09-16 14:05:02,488 INFO L226 Difference]: Without dead ends: 299 [2020-09-16 14:05:02,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-16 14:05:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-16 14:05:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-09-16 14:05:02,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-16 14:05:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-16 14:05:02,492 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-16 14:05:02,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:02,492 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-16 14:05:02,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:02,492 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-16 14:05:02,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:02,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:02,493 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:02,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:02,693 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 236 times [2020-09-16 14:05:02,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:02,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559448293] [2020-09-16 14:05:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:02,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559448293] [2020-09-16 14:05:02,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505050054] [2020-09-16 14:05:02,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:05:02,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:05:02,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:02,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:02,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:03,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:03,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:03,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628681595] [2020-09-16 14:05:03,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:03,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:03,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:03,380 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-16 14:05:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:04,046 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-09-16 14:05:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:05:04,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:04,049 INFO L225 Difference]: With dead ends: 225 [2020-09-16 14:05:04,049 INFO L226 Difference]: Without dead ends: 223 [2020-09-16 14:05:04,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:05:04,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-16 14:05:04,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-09-16 14:05:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-16 14:05:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-16 14:05:04,052 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-16 14:05:04,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:04,052 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-16 14:05:04,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:04,052 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-16 14:05:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:04,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:04,052 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:04,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-16 14:05:04,253 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:04,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 237 times [2020-09-16 14:05:04,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:04,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775594797] [2020-09-16 14:05:04,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:04,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775594797] [2020-09-16 14:05:04,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996839603] [2020-09-16 14:05:04,499 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 [2020-09-16 14:05:04,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:05:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:04,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:04,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:04,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:04,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436933608] [2020-09-16 14:05:04,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:04,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:04,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:04,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:04,961 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-16 14:05:05,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:05,672 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-09-16 14:05:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:05:05,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:05,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:05,675 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:05:05,675 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 14:05:05,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:05:05,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 14:05:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-09-16 14:05:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-16 14:05:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-16 14:05:05,678 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-16 14:05:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:05,679 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-16 14:05:05,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-16 14:05:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:05,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:05,679 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:05,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-09-16 14:05:05,880 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:05,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 238 times [2020-09-16 14:05:05,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:05,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497275281] [2020-09-16 14:05:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:06,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497275281] [2020-09-16 14:05:06,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988016793] [2020-09-16 14:05:06,110 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 [2020-09-16 14:05:06,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:06,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:06,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:06,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:06,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:06,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63391419] [2020-09-16 14:05:06,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:06,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:06,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:06,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:06,596 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-16 14:05:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:07,476 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-09-16 14:05:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:05:07,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:07,478 INFO L225 Difference]: With dead ends: 221 [2020-09-16 14:05:07,479 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 14:05:07,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:05:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 14:05:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-09-16 14:05:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-16 14:05:07,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-16 14:05:07,482 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-16 14:05:07,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:07,482 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-16 14:05:07,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:07,482 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-16 14:05:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:07,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:07,483 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:07,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:07,688 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 239 times [2020-09-16 14:05:07,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:07,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151388500] [2020-09-16 14:05:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:07,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151388500] [2020-09-16 14:05:07,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387978827] [2020-09-16 14:05:07,913 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 [2020-09-16 14:05:07,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:05:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:07,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:08,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:10,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:10,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-16 14:05:10,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522772187] [2020-09-16 14:05:10,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-16 14:05:10,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:10,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-16 14:05:10,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-09-16 14:05:10,042 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-16 14:05:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:31,941 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-09-16 14:05:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-16 14:05:31,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-16 14:05:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:31,950 INFO L225 Difference]: With dead ends: 252 [2020-09-16 14:05:31,950 INFO L226 Difference]: Without dead ends: 247 [2020-09-16 14:05:31,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-09-16 14:05:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-16 14:05:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-09-16 14:05:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-16 14:05:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-16 14:05:31,953 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-16 14:05:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:31,953 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-16 14:05:31,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-16 14:05:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-16 14:05:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:31,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:31,954 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:32,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:32,155 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:32,155 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 240 times [2020-09-16 14:05:32,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:32,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032455271] [2020-09-16 14:05:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:32,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032455271] [2020-09-16 14:05:32,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642131185] [2020-09-16 14:05:32,410 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 [2020-09-16 14:05:32,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:05:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-16 14:05:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:32,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:32,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:32,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-16 14:05:32,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45486259] [2020-09-16 14:05:32,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-16 14:05:32,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-16 14:05:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-16 14:05:32,875 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-16 14:05:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:33,942 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-09-16 14:05:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:05:33,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-16 14:05:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:33,945 INFO L225 Difference]: With dead ends: 225 [2020-09-16 14:05:33,946 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 14:05:33,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:05:33,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 14:05:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-09-16 14:05:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-16 14:05:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-16 14:05:33,953 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-16 14:05:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:33,953 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-16 14:05:33,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-16 14:05:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-16 14:05:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:33,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:33,954 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:34,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:34,155 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-16 14:05:34,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:34,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502244114] [2020-09-16 14:05:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:34,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502244114] [2020-09-16 14:05:34,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242774503] [2020-09-16 14:05:34,434 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 [2020-09-16 14:05:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:34,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-16 14:05:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:35,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:35,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-16 14:05:35,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772441838] [2020-09-16 14:05:35,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-16 14:05:35,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-16 14:05:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:05:35,006 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-16 14:05:35,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:35,593 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-16 14:05:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:05:35,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-16 14:05:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:35,597 INFO L225 Difference]: With dead ends: 206 [2020-09-16 14:05:35,597 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 14:05:35,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:05:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 14:05:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-16 14:05:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-16 14:05:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-16 14:05:35,601 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-16 14:05:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:35,601 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-16 14:05:35,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-16 14:05:35,601 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-16 14:05:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:35,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:35,602 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:35,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:35,803 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-16 14:05:35,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:35,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269685381] [2020-09-16 14:05:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269685381] [2020-09-16 14:05:36,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891248065] [2020-09-16 14:05:36,247 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 [2020-09-16 14:05:36,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:36,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:36,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:36,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353563421] [2020-09-16 14:05:36,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:36,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:36,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:36,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:36,815 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-16 14:05:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:36,975 INFO L93 Difference]: Finished difference Result 204 states and 479 transitions. [2020-09-16 14:05:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:05:36,977 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:36,978 INFO L225 Difference]: With dead ends: 204 [2020-09-16 14:05:36,978 INFO L226 Difference]: Without dead ends: 201 [2020-09-16 14:05:36,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:36,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-16 14:05:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2020-09-16 14:05:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:05:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-16 14:05:36,981 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-16 14:05:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:36,981 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-16 14:05:36,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-16 14:05:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:36,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:36,982 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:37,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-09-16 14:05:37,183 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:37,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:37,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-16 14:05:37,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:37,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428446924] [2020-09-16 14:05:37,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:37,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428446924] [2020-09-16 14:05:37,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093372163] [2020-09-16 14:05:37,596 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 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 [2020-09-16 14:05:37,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:05:37,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:37,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:37,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:38,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:38,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:38,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764899547] [2020-09-16 14:05:38,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:38,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:38,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:38,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:38,117 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-16 14:05:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:38,312 INFO L93 Difference]: Finished difference Result 224 states and 518 transitions. [2020-09-16 14:05:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:05:38,314 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:38,315 INFO L225 Difference]: With dead ends: 224 [2020-09-16 14:05:38,315 INFO L226 Difference]: Without dead ends: 221 [2020-09-16 14:05:38,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-09-16 14:05:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-16 14:05:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2020-09-16 14:05:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-16 14:05:38,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-16 14:05:38,318 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-16 14:05:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:38,318 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-16 14:05:38,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:38,319 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-16 14:05:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:38,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:38,319 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:38,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:38,520 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-16 14:05:38,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:38,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855807174] [2020-09-16 14:05:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:38,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855807174] [2020-09-16 14:05:38,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576826009] [2020-09-16 14:05:38,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:05:38,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-16 14:05:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:39,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:39,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:39,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444720259] [2020-09-16 14:05:39,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:39,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:39,392 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-16 14:05:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:39,662 INFO L93 Difference]: Finished difference Result 223 states and 518 transitions. [2020-09-16 14:05:39,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:05:39,665 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:39,666 INFO L225 Difference]: With dead ends: 223 [2020-09-16 14:05:39,666 INFO L226 Difference]: Without dead ends: 220 [2020-09-16 14:05:39,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-09-16 14:05:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-16 14:05:39,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 168. [2020-09-16 14:05:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-16 14:05:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-16 14:05:39,669 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-16 14:05:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:39,669 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-16 14:05:39,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:39,669 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-16 14:05:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:39,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:39,670 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:39,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-16 14:05:39,871 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-16 14:05:39,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:39,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102365717] [2020-09-16 14:05:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:40,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102365717] [2020-09-16 14:05:40,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742622927] [2020-09-16 14:05:40,220 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 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 [2020-09-16 14:05:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:40,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:40,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:40,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:40,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493812754] [2020-09-16 14:05:40,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:40,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:40,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:40,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:40,722 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-16 14:05:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:41,044 INFO L93 Difference]: Finished difference Result 222 states and 518 transitions. [2020-09-16 14:05:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:05:41,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:41,047 INFO L225 Difference]: With dead ends: 222 [2020-09-16 14:05:41,047 INFO L226 Difference]: Without dead ends: 219 [2020-09-16 14:05:41,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-16 14:05:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-16 14:05:41,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2020-09-16 14:05:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-16 14:05:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-16 14:05:41,050 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-16 14:05:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:41,050 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-16 14:05:41,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-16 14:05:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:41,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:41,051 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:41,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:41,252 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:41,252 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-16 14:05:41,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:41,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267237431] [2020-09-16 14:05:41,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:41,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267237431] [2020-09-16 14:05:41,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040159483] [2020-09-16 14:05:41,570 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 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 [2020-09-16 14:05:41,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:05:41,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:41,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:41,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:42,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:42,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:42,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895132043] [2020-09-16 14:05:42,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:42,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:42,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:42,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:42,075 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-16 14:05:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:42,514 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-16 14:05:42,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:05:42,517 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:42,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:42,518 INFO L225 Difference]: With dead ends: 221 [2020-09-16 14:05:42,518 INFO L226 Difference]: Without dead ends: 218 [2020-09-16 14:05:42,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-16 14:05:42,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-16 14:05:42,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 170. [2020-09-16 14:05:42,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:05:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-16 14:05:42,521 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-16 14:05:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:42,521 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-16 14:05:42,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-16 14:05:42,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:42,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:42,522 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:42,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-16 14:05:42,723 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:42,724 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-16 14:05:42,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:42,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282158546] [2020-09-16 14:05:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:43,042 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282158546] [2020-09-16 14:05:43,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755865661] [2020-09-16 14:05:43,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:05:43,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-16 14:05:43,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:43,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:43,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:43,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:43,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:43,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315600297] [2020-09-16 14:05:43,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:43,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:43,643 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-16 14:05:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:44,176 INFO L93 Difference]: Finished difference Result 220 states and 518 transitions. [2020-09-16 14:05:44,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:05:44,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:44,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:44,180 INFO L225 Difference]: With dead ends: 220 [2020-09-16 14:05:44,180 INFO L226 Difference]: Without dead ends: 217 [2020-09-16 14:05:44,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-09-16 14:05:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-16 14:05:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2020-09-16 14:05:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:05:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-16 14:05:44,184 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-16 14:05:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:44,184 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-16 14:05:44,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-16 14:05:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:44,184 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:44,184 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:44,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:44,385 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:44,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-16 14:05:44,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:44,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941068901] [2020-09-16 14:05:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:44,677 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:44,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941068901] [2020-09-16 14:05:44,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290069441] [2020-09-16 14:05:44,678 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 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 [2020-09-16 14:05:44,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:45,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:45,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:45,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24145241] [2020-09-16 14:05:45,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:45,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:45,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:45,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:45,263 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-16 14:05:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:45,812 INFO L93 Difference]: Finished difference Result 219 states and 518 transitions. [2020-09-16 14:05:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:05:45,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:45,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:45,816 INFO L225 Difference]: With dead ends: 219 [2020-09-16 14:05:45,816 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 14:05:45,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:05:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 14:05:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 174. [2020-09-16 14:05:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:05:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-16 14:05:45,820 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-16 14:05:45,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:45,820 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-16 14:05:45,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-16 14:05:45,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-16 14:05:45,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:45,821 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:46,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:46,022 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-16 14:05:46,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:46,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904065691] [2020-09-16 14:05:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:46,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904065691] [2020-09-16 14:05:46,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177199480] [2020-09-16 14:05:46,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:05:46,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-16 14:05:46,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:46,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:46,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:46,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-16 14:05:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:46,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:46,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:46,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922265489] [2020-09-16 14:05:46,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:46,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:46,827 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-16 14:05:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:47,537 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-16 14:05:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:05:47,540 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-16 14:05:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:47,541 INFO L225 Difference]: With dead ends: 228 [2020-09-16 14:05:47,541 INFO L226 Difference]: Without dead ends: 222 [2020-09-16 14:05:47,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:05:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-16 14:05:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-16 14:05:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-16 14:05:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-16 14:05:47,545 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-16 14:05:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:47,546 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-16 14:05:47,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-16 14:05:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:05:47,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:47,546 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:47,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-09-16 14:05:47,757 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:47,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 241 times [2020-09-16 14:05:47,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:47,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475010843] [2020-09-16 14:05:47,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:48,086 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:48,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475010843] [2020-09-16 14:05:48,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674762499] [2020-09-16 14:05:48,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:05:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:48,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:48,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:48,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987801857] [2020-09-16 14:05:48,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:48,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:48,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:48,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:48,640 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-16 14:05:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:48,816 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-16 14:05:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-16 14:05:48,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:05:48,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:48,820 INFO L225 Difference]: With dead ends: 213 [2020-09-16 14:05:48,820 INFO L226 Difference]: Without dead ends: 211 [2020-09-16 14:05:48,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-16 14:05:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-16 14:05:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-16 14:05:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-16 14:05:48,823 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-16 14:05:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:48,823 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-16 14:05:48,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-16 14:05:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:05:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:48,824 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:49,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:49,025 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 242 times [2020-09-16 14:05:49,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:49,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161436345] [2020-09-16 14:05:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161436345] [2020-09-16 14:05:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454891167] [2020-09-16 14:05:49,374 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 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 [2020-09-16 14:05:49,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:05:49,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:49,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:49,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:49,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:49,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418812306] [2020-09-16 14:05:49,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:49,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:49,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:49,928 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-16 14:05:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:50,565 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-16 14:05:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-16 14:05:50,569 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:05:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:50,569 INFO L225 Difference]: With dead ends: 226 [2020-09-16 14:05:50,570 INFO L226 Difference]: Without dead ends: 224 [2020-09-16 14:05:50,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-09-16 14:05:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-16 14:05:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-16 14:05:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-16 14:05:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-16 14:05:50,572 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-16 14:05:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:50,573 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-16 14:05:50,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-16 14:05:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:05:50,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:50,573 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:50,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:50,774 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:50,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 243 times [2020-09-16 14:05:50,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:50,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825308593] [2020-09-16 14:05:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:51,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825308593] [2020-09-16 14:05:51,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799141606] [2020-09-16 14:05:51,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:51,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:05:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:51,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:51,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:51,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:51,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:51,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652597617] [2020-09-16 14:05:51,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:51,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:51,866 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-16 14:05:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:52,677 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-16 14:05:52,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-16 14:05:52,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:05:52,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:52,680 INFO L225 Difference]: With dead ends: 241 [2020-09-16 14:05:52,681 INFO L226 Difference]: Without dead ends: 239 [2020-09-16 14:05:52,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-09-16 14:05:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-16 14:05:52,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-16 14:05:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:05:52,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:05:52,684 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:05:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:52,684 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:05:52,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:05:52,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:05:52,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:52,685 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:52,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:52,886 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:52,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 244 times [2020-09-16 14:05:52,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:52,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208273334] [2020-09-16 14:05:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:53,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208273334] [2020-09-16 14:05:53,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133075868] [2020-09-16 14:05:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:53,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:05:53,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:53,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:53,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:05:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:53,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:05:53,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:05:53,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596413136] [2020-09-16 14:05:53,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:05:53,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:05:53,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:05:53,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:05:53,792 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-16 14:05:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:05:54,710 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-16 14:05:54,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-16 14:05:54,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:05:54,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:05:54,713 INFO L225 Difference]: With dead ends: 243 [2020-09-16 14:05:54,713 INFO L226 Difference]: Without dead ends: 241 [2020-09-16 14:05:54,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:05:54,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-16 14:05:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-16 14:05:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-16 14:05:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-16 14:05:54,716 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-16 14:05:54,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:05:54,717 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-16 14:05:54,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:05:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-16 14:05:54,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:05:54,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:05:54,717 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:05:54,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:54,918 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:05:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:05:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 245 times [2020-09-16 14:05:54,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:05:54,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939998359] [2020-09-16 14:05:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:05:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:05:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:05:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939998359] [2020-09-16 14:05:55,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903101795] [2020-09-16 14:05:55,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:05:55,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:05:55,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:05:55,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:05:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:02,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:02,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:02,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077201112] [2020-09-16 14:06:02,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:02,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:02,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:02,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-09-16 14:06:02,254 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-16 14:06:06,669 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-09-16 14:06:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:07,417 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-16 14:06:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:06:07,420 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:07,421 INFO L225 Difference]: With dead ends: 253 [2020-09-16 14:06:07,421 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 14:06:07,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-09-16 14:06:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 14:06:07,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-16 14:06:07,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:06:07,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:06:07,424 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:06:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:07,424 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:06:07,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:06:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:07,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:07,425 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:07,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-16 14:06:07,626 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 246 times [2020-09-16 14:06:07,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:07,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326498903] [2020-09-16 14:06:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:07,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326498903] [2020-09-16 14:06:07,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476134242] [2020-09-16 14:06:07,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:08,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:06:08,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:08,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:08,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:08,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558325587] [2020-09-16 14:06:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:08,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:08,612 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:06:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:09,619 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-16 14:06:09,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-16 14:06:09,622 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:09,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:09,623 INFO L225 Difference]: With dead ends: 247 [2020-09-16 14:06:09,623 INFO L226 Difference]: Without dead ends: 245 [2020-09-16 14:06:09,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-09-16 14:06:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-16 14:06:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-16 14:06:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:06:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-16 14:06:09,627 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-16 14:06:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:09,627 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-16 14:06:09,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-16 14:06:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:09,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:09,628 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:09,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-16 14:06:09,829 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 247 times [2020-09-16 14:06:09,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:09,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667023730] [2020-09-16 14:06:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:10,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667023730] [2020-09-16 14:06:10,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973493049] [2020-09-16 14:06:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:10,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:10,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:16,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:16,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:16,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132505381] [2020-09-16 14:06:16,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:16,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:16,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:06:16,840 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-16 14:06:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:18,043 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-16 14:06:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:06:18,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:18,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:18,047 INFO L225 Difference]: With dead ends: 245 [2020-09-16 14:06:18,047 INFO L226 Difference]: Without dead ends: 243 [2020-09-16 14:06:18,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:06:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-16 14:06:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-16 14:06:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:06:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:06:18,050 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:06:18,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:18,050 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:06:18,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:06:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:18,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:18,051 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:18,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-16 14:06:18,251 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:18,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 248 times [2020-09-16 14:06:18,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:18,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061046201] [2020-09-16 14:06:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:18,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061046201] [2020-09-16 14:06:18,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837918463] [2020-09-16 14:06:18,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:06:18,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:06:18,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:18,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:27,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:27,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:27,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040470153] [2020-09-16 14:06:27,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:27,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:27,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:27,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=237, Unknown=2, NotChecked=0, Total=342 [2020-09-16 14:06:27,133 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:06:27,531 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-09-16 14:06:29,773 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 41 [2020-09-16 14:06:32,177 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-09-16 14:06:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:06:36,337 INFO L93 Difference]: Finished difference Result 251 states and 595 transitions. [2020-09-16 14:06:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-16 14:06:36,340 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:06:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:06:36,341 INFO L225 Difference]: With dead ends: 251 [2020-09-16 14:06:36,341 INFO L226 Difference]: Without dead ends: 249 [2020-09-16 14:06:36,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=247, Invalid=505, Unknown=4, NotChecked=0, Total=756 [2020-09-16 14:06:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-16 14:06:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-09-16 14:06:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:06:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:06:36,345 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:06:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:06:36,345 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:06:36,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:06:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:06:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:06:36,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:06:36,346 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:06:36,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:06:36,547 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:06:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:06:36,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 249 times [2020-09-16 14:06:36,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:06:36,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538167002] [2020-09-16 14:06:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:06:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:06:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538167002] [2020-09-16 14:06:36,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604995769] [2020-09-16 14:06:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:06:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:06:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:06:36,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:06:36,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:06:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:06:47,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:06:47,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:06:47,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344050592] [2020-09-16 14:06:47,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:06:47,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:06:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:06:47,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=235, Unknown=2, NotChecked=0, Total=342 [2020-09-16 14:06:47,219 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-16 14:06:51,615 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-16 14:07:04,351 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-09-16 14:07:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:12,256 INFO L93 Difference]: Finished difference Result 254 states and 602 transitions. [2020-09-16 14:07:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:07:12,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:12,261 INFO L225 Difference]: With dead ends: 254 [2020-09-16 14:07:12,261 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 14:07:12,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=253, Invalid=498, Unknown=5, NotChecked=0, Total=756 [2020-09-16 14:07:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 14:07:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-09-16 14:07:12,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:07:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:07:12,265 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:07:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:12,266 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:07:12,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:07:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:12,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:12,266 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:12,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-09-16 14:07:12,467 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:12,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 250 times [2020-09-16 14:07:12,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:12,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478353610] [2020-09-16 14:07:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:12,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478353610] [2020-09-16 14:07:12,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408547045] [2020-09-16 14:07:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:12,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:07:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:15,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:15,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:15,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764997600] [2020-09-16 14:07:15,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:15,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:15,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:15,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:15,602 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:16,891 INFO L93 Difference]: Finished difference Result 256 states and 605 transitions. [2020-09-16 14:07:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-16 14:07:16,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:16,895 INFO L225 Difference]: With dead ends: 256 [2020-09-16 14:07:16,896 INFO L226 Difference]: Without dead ends: 254 [2020-09-16 14:07:16,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-16 14:07:16,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-16 14:07:16,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2020-09-16 14:07:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-16 14:07:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2020-09-16 14:07:16,900 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 15 [2020-09-16 14:07:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:16,900 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2020-09-16 14:07:16,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:16,900 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2020-09-16 14:07:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:16,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:16,900 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:17,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-09-16 14:07:17,101 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:17,102 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 251 times [2020-09-16 14:07:17,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:17,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033517380] [2020-09-16 14:07:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:17,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:17,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033517380] [2020-09-16 14:07:17,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364706313] [2020-09-16 14:07:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:17,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:07:17,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:17,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:18,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:18,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:18,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715781573] [2020-09-16 14:07:18,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:18,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:18,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:18,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:18,062 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand 19 states. [2020-09-16 14:07:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:19,323 INFO L93 Difference]: Finished difference Result 247 states and 586 transitions. [2020-09-16 14:07:19,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:07:19,327 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:19,328 INFO L225 Difference]: With dead ends: 247 [2020-09-16 14:07:19,328 INFO L226 Difference]: Without dead ends: 245 [2020-09-16 14:07:19,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:07:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-16 14:07:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-16 14:07:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:07:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:07:19,333 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:07:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:19,333 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:07:19,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:07:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:19,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:19,334 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:19,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:19,534 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 252 times [2020-09-16 14:07:19,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:19,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615724150] [2020-09-16 14:07:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:19,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615724150] [2020-09-16 14:07:19,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310887400] [2020-09-16 14:07:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:07:19,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:07:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:20,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:20,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:20,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757504856] [2020-09-16 14:07:20,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:20,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:20,509 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-16 14:07:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:21,635 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-16 14:07:21,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:07:21,638 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:21,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:21,639 INFO L225 Difference]: With dead ends: 253 [2020-09-16 14:07:21,639 INFO L226 Difference]: Without dead ends: 251 [2020-09-16 14:07:21,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-09-16 14:07:21,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-16 14:07:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-09-16 14:07:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-16 14:07:21,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 447 transitions. [2020-09-16 14:07:21,642 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 447 transitions. Word has length 15 [2020-09-16 14:07:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:21,642 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 447 transitions. [2020-09-16 14:07:21,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 447 transitions. [2020-09-16 14:07:21,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:21,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:21,643 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:21,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:21,844 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:21,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:21,844 INFO L82 PathProgramCache]: Analyzing trace with hash -884124787, now seen corresponding path program 253 times [2020-09-16 14:07:21,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:21,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360167006] [2020-09-16 14:07:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:22,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360167006] [2020-09-16 14:07:22,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974627467] [2020-09-16 14:07:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:22,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:23,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:23,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:23,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045915190] [2020-09-16 14:07:23,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:23,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:23,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:23,020 INFO L87 Difference]: Start difference. First operand 175 states and 447 transitions. Second operand 19 states. [2020-09-16 14:07:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:24,227 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-09-16 14:07:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-16 14:07:24,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:24,232 INFO L225 Difference]: With dead ends: 254 [2020-09-16 14:07:24,232 INFO L226 Difference]: Without dead ends: 252 [2020-09-16 14:07:24,232 INFO L675 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 [2020-09-16 14:07:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-16 14:07:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 174. [2020-09-16 14:07:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-16 14:07:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-16 14:07:24,236 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-16 14:07:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:24,236 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-16 14:07:24,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-16 14:07:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:24,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:24,236 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:24,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:24,437 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash -883231057, now seen corresponding path program 254 times [2020-09-16 14:07:24,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:24,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950116796] [2020-09-16 14:07:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:24,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950116796] [2020-09-16 14:07:24,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073262028] [2020-09-16 14:07:24,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:24,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-16 14:07:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:24,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:25,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:25,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:25,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004503706] [2020-09-16 14:07:25,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:25,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:25,372 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-16 14:07:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:26,510 INFO L93 Difference]: Finished difference Result 260 states and 612 transitions. [2020-09-16 14:07:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:07:26,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:26,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:26,515 INFO L225 Difference]: With dead ends: 260 [2020-09-16 14:07:26,515 INFO L226 Difference]: Without dead ends: 258 [2020-09-16 14:07:26,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:07:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-16 14:07:26,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 177. [2020-09-16 14:07:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:07:26,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:07:26,519 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:07:26,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:26,519 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:07:26,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:07:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:26,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:26,520 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:26,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-09-16 14:07:26,720 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -883230096, now seen corresponding path program 255 times [2020-09-16 14:07:26,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:26,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432676519] [2020-09-16 14:07:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:27,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:27,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432676519] [2020-09-16 14:07:27,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379909517] [2020-09-16 14:07:27,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-16 14:07:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:27,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:27,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:27,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:27,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881418769] [2020-09-16 14:07:27,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:27,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:27,627 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:28,623 INFO L93 Difference]: Finished difference Result 264 states and 623 transitions. [2020-09-16 14:07:28,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:07:28,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:28,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:28,627 INFO L225 Difference]: With dead ends: 264 [2020-09-16 14:07:28,627 INFO L226 Difference]: Without dead ends: 262 [2020-09-16 14:07:28,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-16 14:07:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-16 14:07:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 179. [2020-09-16 14:07:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-16 14:07:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 459 transitions. [2020-09-16 14:07:28,630 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 459 transitions. Word has length 15 [2020-09-16 14:07:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:28,631 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 459 transitions. [2020-09-16 14:07:28,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 459 transitions. [2020-09-16 14:07:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:28,631 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:28,631 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:28,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:28,832 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:28,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash -883201266, now seen corresponding path program 256 times [2020-09-16 14:07:28,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:28,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123762372] [2020-09-16 14:07:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:29,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123762372] [2020-09-16 14:07:29,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519133180] [2020-09-16 14:07:29,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:29,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-16 14:07:29,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:29,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:29,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:29,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469328470] [2020-09-16 14:07:29,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:29,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:29,784 INFO L87 Difference]: Start difference. First operand 179 states and 459 transitions. Second operand 19 states. [2020-09-16 14:07:31,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:31,204 INFO L93 Difference]: Finished difference Result 261 states and 620 transitions. [2020-09-16 14:07:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-16 14:07:31,208 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:31,209 INFO L225 Difference]: With dead ends: 261 [2020-09-16 14:07:31,209 INFO L226 Difference]: Without dead ends: 259 [2020-09-16 14:07:31,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-09-16 14:07:31,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-16 14:07:31,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 177. [2020-09-16 14:07:31,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:07:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:07:31,213 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:07:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:31,213 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:07:31,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:07:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:31,213 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:31,213 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:31,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-09-16 14:07:31,414 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash -855524466, now seen corresponding path program 257 times [2020-09-16 14:07:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:31,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934687230] [2020-09-16 14:07:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:31,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934687230] [2020-09-16 14:07:31,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153861010] [2020-09-16 14:07:31,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 14:07:31,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-16 14:07:31,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:31,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:32,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:32,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:32,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605564855] [2020-09-16 14:07:32,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:32,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:32,563 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:34,433 INFO L93 Difference]: Finished difference Result 259 states and 612 transitions. [2020-09-16 14:07:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-16 14:07:34,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:34,438 INFO L225 Difference]: With dead ends: 259 [2020-09-16 14:07:34,438 INFO L226 Difference]: Without dead ends: 257 [2020-09-16 14:07:34,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-09-16 14:07:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-09-16 14:07:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 177. [2020-09-16 14:07:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-16 14:07:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-16 14:07:34,443 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-16 14:07:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:34,443 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-16 14:07:34,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-16 14:07:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:34,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:34,444 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:34,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-16 14:07:34,655 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:34,656 INFO L82 PathProgramCache]: Analyzing trace with hash -855495636, now seen corresponding path program 258 times [2020-09-16 14:07:34,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:34,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522047172] [2020-09-16 14:07:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522047172] [2020-09-16 14:07:35,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529969144] [2020-09-16 14:07:35,030 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:07:35,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-16 14:07:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-16 14:07:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:42,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:42,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:42,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217138919] [2020-09-16 14:07:42,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:42,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-09-16 14:07:42,104 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-16 14:07:46,753 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-09-16 14:07:51,155 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-09-16 14:07:53,823 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 35 [2020-09-16 14:07:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 14:07:54,514 INFO L93 Difference]: Finished difference Result 255 states and 606 transitions. [2020-09-16 14:07:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-16 14:07:54,519 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-16 14:07:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 14:07:54,520 INFO L225 Difference]: With dead ends: 255 [2020-09-16 14:07:54,520 INFO L226 Difference]: Without dead ends: 253 [2020-09-16 14:07:54,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-09-16 14:07:54,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-16 14:07:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 176. [2020-09-16 14:07:54,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-16 14:07:54,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-16 14:07:54,524 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-16 14:07:54,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 14:07:54,524 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-16 14:07:54,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-16 14:07:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-16 14:07:54,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 14:07:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 14:07:54,525 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 14:07:54,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-16 14:07:54,725 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 14:07:54,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 14:07:54,726 INFO L82 PathProgramCache]: Analyzing trace with hash -854571154, now seen corresponding path program 259 times [2020-09-16 14:07:54,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 14:07:54,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415084743] [2020-09-16 14:07:54,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 14:07:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:55,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415084743] [2020-09-16 14:07:55,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303671421] [2020-09-16 14:07:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-16 14:07:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 14:07:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-16 14:07:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 14:07:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 14:07:55,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 14:07:55,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-16 14:07:55,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535748526] [2020-09-16 14:07:55,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-16 14:07:55,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 14:07:55,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-16 14:07:55,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-16 14:07:55,910 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states.