/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 23:43:01,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 23:43:01,921 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 23:43:01,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 23:43:01,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 23:43:01,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 23:43:01,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 23:43:01,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 23:43:01,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 23:43:01,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 23:43:01,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 23:43:01,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 23:43:01,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 23:43:01,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 23:43:01,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 23:43:01,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 23:43:01,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 23:43:01,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 23:43:01,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 23:43:02,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 23:43:02,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 23:43:02,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 23:43:02,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 23:43:02,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 23:43:02,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 23:43:02,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 23:43:02,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 23:43:02,027 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 23:43:02,028 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 23:43:02,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 23:43:02,029 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 23:43:02,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 23:43:02,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 23:43:02,035 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 23:43:02,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 23:43:02,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 23:43:02,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 23:43:02,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 23:43:02,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 23:43:02,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 23:43:02,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 23:43:02,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-21 23:43:02,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 23:43:02,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 23:43:02,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 23:43:02,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 23:43:02,083 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 23:43:02,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 23:43:02,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 23:43:02,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 23:43:02,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 23:43:02,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 23:43:02,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 23:43:02,086 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 23:43:02,086 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 23:43:02,086 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 23:43:02,086 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 23:43:02,087 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 23:43:02,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 23:43:02,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 23:43:02,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 23:43:02,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 23:43:02,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 23:43:02,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 23:43:02,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 23:43:02,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 23:43:02,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 23:43:02,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 23:43:02,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 23:43:02,089 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-21 23:43:02,090 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 23:43:02,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 23:43:02,090 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-21 23:43:02,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 23:43:02,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 23:43:02,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 23:43:02,394 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 23:43:02,395 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 23:43:02,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-21 23:43:02,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9656a707e/f89e5cb29d064cd2844971d7312945d6/FLAGf7311765a [2020-10-21 23:43:03,049 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 23:43:03,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-21 23:43:03,063 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9656a707e/f89e5cb29d064cd2844971d7312945d6/FLAGf7311765a [2020-10-21 23:43:03,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9656a707e/f89e5cb29d064cd2844971d7312945d6 [2020-10-21 23:43:03,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 23:43:03,311 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 23:43:03,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 23:43:03,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 23:43:03,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 23:43:03,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:43:03" (1/1) ... [2020-10-21 23:43:03,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61977029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:03, skipping insertion in model container [2020-10-21 23:43:03,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:43:03" (1/1) ... [2020-10-21 23:43:03,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 23:43:03,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 23:43:03,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:43:03,924 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 23:43:03,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:43:04,043 INFO L208 MainTranslator]: Completed translation [2020-10-21 23:43:04,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04 WrapperNode [2020-10-21 23:43:04,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 23:43:04,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 23:43:04,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 23:43:04,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 23:43:04,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,093 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 23:43:04,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 23:43:04,094 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 23:43:04,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 23:43:04,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... [2020-10-21 23:43:04,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 23:43:04,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 23:43:04,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 23:43:04,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 23:43:04,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 23:43:04,189 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 23:43:04,189 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 23:43:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 23:43:04,190 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 23:43:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 23:43:04,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 23:43:04,191 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 23:43:04,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 23:43:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 23:43:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 23:43:04,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 23:43:04,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 23:43:04,194 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 23:43:04,540 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 23:43:04,541 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 23:43:04,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:43:04 BoogieIcfgContainer [2020-10-21 23:43:04,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 23:43:04,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 23:43:04,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 23:43:04,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 23:43:04,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 11:43:03" (1/3) ... [2020-10-21 23:43:04,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da4cf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:43:04, skipping insertion in model container [2020-10-21 23:43:04,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:43:04" (2/3) ... [2020-10-21 23:43:04,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da4cf64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:43:04, skipping insertion in model container [2020-10-21 23:43:04,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:43:04" (3/3) ... [2020-10-21 23:43:04,554 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-21 23:43:04,567 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 23:43:04,567 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 23:43:04,575 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 23:43:04,576 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 23:43:04,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,608 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,609 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,610 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,611 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,612 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,612 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,613 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,613 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,614 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,614 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,615 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,616 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,617 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,617 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,618 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,622 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,622 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,623 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,623 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,630 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,631 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,631 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,632 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:43:04,643 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 23:43:04,655 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 23:43:04,676 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 23:43:04,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 23:43:04,676 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 23:43:04,676 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-21 23:43:04,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 23:43:04,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 23:43:04,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 23:43:04,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 23:43:04,691 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 23:43:04,692 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:04,695 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:04,697 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-10-21 23:43:04,741 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-10-21 23:43:04,741 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 23:43:04,747 INFO L80 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-10-21 23:43:04,750 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-10-21 23:43:06,063 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-21 23:43:06,434 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-10-21 23:43:06,571 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-21 23:43:06,595 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-10-21 23:43:06,596 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-10-21 23:43:06,603 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 23:43:06,614 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 23:43:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 23:43:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 23:43:06,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:06,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 23:43:06,624 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:06,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:06,630 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-10-21 23:43:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:06,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123355706] [2020-10-21 23:43:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:06,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123355706] [2020-10-21 23:43:06,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:06,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 23:43:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1566409983] [2020-10-21 23:43:06,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:06,872 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:06,886 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-21 23:43:06,887 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:06,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:06,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 23:43:06,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 23:43:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 23:43:06,911 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 23:43:06,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:06,976 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-21 23:43:06,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 23:43:06,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 23:43:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:06,990 INFO L225 Difference]: With dead ends: 75 [2020-10-21 23:43:06,991 INFO L226 Difference]: Without dead ends: 42 [2020-10-21 23:43:06,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:43:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-21 23:43:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-21 23:43:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-21 23:43:07,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-21 23:43:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,038 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-21 23:43:07,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 23:43:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-21 23:43:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 23:43:07,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:07,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 23:43:07,040 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:07,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:07,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-10-21 23:43:07,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:07,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531398730] [2020-10-21 23:43:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531398730] [2020-10-21 23:43:07,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:07,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 23:43:07,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1580106479] [2020-10-21 23:43:07,126 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:07,127 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:07,130 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-21 23:43:07,131 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:07,177 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:07,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 23:43:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 23:43:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:43:07,180 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-21 23:43:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:07,231 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-21 23:43:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-21 23:43:07,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 23:43:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:07,232 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:07,233 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:07,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:43:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 23:43:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-21 23:43:07,241 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-21 23:43:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,243 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-21 23:43:07,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 23:43:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-21 23:43:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:43:07,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:07,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 23:43:07,245 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:07,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-10-21 23:43:07,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:07,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757166781] [2020-10-21 23:43:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757166781] [2020-10-21 23:43:07,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:07,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:43:07,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1821014929] [2020-10-21 23:43:07,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:07,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:07,352 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-10-21 23:43:07,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:07,365 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,366 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,393 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,393 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,456 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:07,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:07,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:07,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:07,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:43:07,457 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-10-21 23:43:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:07,563 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-10-21 23:43:07,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 23:43:07,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:43:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:07,564 INFO L225 Difference]: With dead ends: 66 [2020-10-21 23:43:07,565 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:07,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-21 23:43:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-21 23:43:07,572 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-10-21 23:43:07,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,573 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-21 23:43:07,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-21 23:43:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:43:07,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:07,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 23:43:07,575 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-10-21 23:43:07,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:07,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908700852] [2020-10-21 23:43:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908700852] [2020-10-21 23:43:07,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:43:07,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:43:07,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1599214715] [2020-10-21 23:43:07,649 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:07,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:07,652 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-21 23:43:07,652 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:07,696 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:07,696 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:07,749 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:07,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:07,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:07,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:07,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:43:07,751 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-10-21 23:43:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:07,816 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-21 23:43:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:43:07,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:43:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:07,818 INFO L225 Difference]: With dead ends: 67 [2020-10-21 23:43:07,818 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 23:43:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 23:43:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-10-21 23:43:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-21 23:43:07,825 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-10-21 23:43:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:07,826 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-21 23:43:07,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-21 23:43:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:43:07,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:07,827 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:07,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-21 23:43:07,828 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-10-21 23:43:07,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:07,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205330110] [2020-10-21 23:43:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205330110] [2020-10-21 23:43:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515636064] [2020-10-21 23:43:07,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:43:08,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:08,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:08,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:43:08,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1333569503] [2020-10-21 23:43:08,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:08,073 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:08,075 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-21 23:43:08,076 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:08,115 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:08,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:43:08,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:08,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:43:08,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:08,116 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-10-21 23:43:08,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:08,290 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-10-21 23:43:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:08,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 23:43:08,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:08,292 INFO L225 Difference]: With dead ends: 63 [2020-10-21 23:43:08,292 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 23:43:08,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 23:43:08,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-10-21 23:43:08,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-21 23:43:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-10-21 23:43:08,306 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-10-21 23:43:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:08,306 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-10-21 23:43:08,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:43:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-10-21 23:43:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:43:08,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:08,308 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:08,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,511 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:08,512 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-10-21 23:43:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:08,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895526923] [2020-10-21 23:43:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895526923] [2020-10-21 23:43:08,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395207357] [2020-10-21 23:43:08,572 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:08,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:08,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 23:43:08,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:08,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:08,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:08,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-21 23:43:08,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1608232817] [2020-10-21 23:43:08,697 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:08,698 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:08,700 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-10-21 23:43:08,701 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:08,759 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:08,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:43:08,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:08,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:43:08,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:43:08,760 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-10-21 23:43:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:08,868 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-21 23:43:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-21 23:43:08,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-21 23:43:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:08,870 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:08,870 INFO L226 Difference]: Without dead ends: 51 [2020-10-21 23:43:08,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:08,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-21 23:43:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-10-21 23:43:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-21 23:43:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-21 23:43:08,881 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-21 23:43:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:08,881 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-21 23:43:08,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:43:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-21 23:43:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:08,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:08,883 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:09,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,085 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:09,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:09,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-10-21 23:43:09,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:09,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027184224] [2020-10-21 23:43:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027184224] [2020-10-21 23:43:09,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864854253] [2020-10-21 23:43:09,177 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:09,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:09,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:09,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:09,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:09,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-21 23:43:09,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [280004490] [2020-10-21 23:43:09,270 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:09,272 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:09,274 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-10-21 23:43:09,274 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:09,278 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:09,278 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:09,378 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:09,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:09,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:09,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:09,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:09,380 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-10-21 23:43:09,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:09,530 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-10-21 23:43:09,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:09,532 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:43:09,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:09,533 INFO L225 Difference]: With dead ends: 56 [2020-10-21 23:43:09,533 INFO L226 Difference]: Without dead ends: 50 [2020-10-21 23:43:09,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-21 23:43:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-21 23:43:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-21 23:43:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-10-21 23:43:09,542 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-10-21 23:43:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:09,542 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-10-21 23:43:09,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-10-21 23:43:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:09,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:09,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:09,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,747 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-10-21 23:43:09,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:09,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568899314] [2020-10-21 23:43:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:09,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568899314] [2020-10-21 23:43:09,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460539302] [2020-10-21 23:43:09,866 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:09,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:43:09,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:09,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:09,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:09,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:09,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:09,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:43:09,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259557899] [2020-10-21 23:43:09,956 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:09,957 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:09,959 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-21 23:43:09,960 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:10,000 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:10,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:43:10,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:10,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:43:10,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:43:10,001 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-10-21 23:43:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:10,205 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 23:43:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:43:10,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:43:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:10,210 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:10,210 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 23:43:10,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 23:43:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-21 23:43:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-21 23:43:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-10-21 23:43:10,221 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-10-21 23:43:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:10,222 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-10-21 23:43:10,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:43:10,224 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-10-21 23:43:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:43:10,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:10,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:10,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:10,426 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:10,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:10,427 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-10-21 23:43:10,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:10,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753025350] [2020-10-21 23:43:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:10,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753025350] [2020-10-21 23:43:10,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727005205] [2020-10-21 23:43:10,487 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:43:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:10,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:10,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:10,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-21 23:43:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508709730] [2020-10-21 23:43:10,574 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:10,575 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:10,577 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-21 23:43:10,577 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:10,650 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:10,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:10,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:10,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:10,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:10,651 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-10-21 23:43:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:10,817 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 23:43:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:43:10,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:43:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:10,818 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:10,818 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 23:43:10,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 23:43:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-10-21 23:43:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-21 23:43:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-21 23:43:10,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-10-21 23:43:10,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:10,824 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-21 23:43:10,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:10,824 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-21 23:43:10,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:43:10,825 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:10,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:11,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,038 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-10-21 23:43:11,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:11,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233424121] [2020-10-21 23:43:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233424121] [2020-10-21 23:43:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022492133] [2020-10-21 23:43:11,106 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:11,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:11,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:11,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:43:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1026729373] [2020-10-21 23:43:11,217 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:11,218 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:11,220 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:43:11,220 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:11,255 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:11,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:43:11,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:11,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:43:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:11,257 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-10-21 23:43:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:11,539 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-10-21 23:43:11,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:11,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:43:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:11,541 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:11,541 INFO L226 Difference]: Without dead ends: 63 [2020-10-21 23:43:11,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-21 23:43:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-10-21 23:43:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-21 23:43:11,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-10-21 23:43:11,546 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-10-21 23:43:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:11,546 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-10-21 23:43:11,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:43:11,547 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-10-21 23:43:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:43:11,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:11,548 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:11,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,758 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:11,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-10-21 23:43:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:11,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120696044] [2020-10-21 23:43:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120696044] [2020-10-21 23:43:11,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929323870] [2020-10-21 23:43:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:11,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 23:43:11,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:11,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:43:11,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:11,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:11,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:11,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-21 23:43:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1122526809] [2020-10-21 23:43:11,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:11,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:11,908 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:43:11,909 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:11,959 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:11,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:43:11,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:11,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:43:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:43:11,960 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-10-21 23:43:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:12,157 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-10-21 23:43:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:43:12,157 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:43:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:12,158 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:12,158 INFO L226 Difference]: Without dead ends: 59 [2020-10-21 23:43:12,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:12,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-21 23:43:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-21 23:43:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 23:43:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-21 23:43:12,163 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-21 23:43:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:12,164 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-21 23:43:12,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:43:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-21 23:43:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:12,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:12,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:12,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:12,372 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:12,373 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-10-21 23:43:12,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:12,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336623817] [2020-10-21 23:43:12,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336623817] [2020-10-21 23:43:12,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642614408] [2020-10-21 23:43:12,481 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:12,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:12,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:12,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:12,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:12,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:12,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-21 23:43:12,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1919823484] [2020-10-21 23:43:12,567 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:12,568 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:12,571 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-10-21 23:43:12,571 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:12,612 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:12,613 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:12,638 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:12,639 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:12,671 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:12,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:12,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:12,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:12,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:12,673 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-10-21 23:43:12,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:12,840 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-10-21 23:43:12,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:43:12,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 23:43:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:12,841 INFO L225 Difference]: With dead ends: 64 [2020-10-21 23:43:12,841 INFO L226 Difference]: Without dead ends: 58 [2020-10-21 23:43:12,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:12,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-21 23:43:12,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-21 23:43:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 23:43:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-10-21 23:43:12,854 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-10-21 23:43:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:12,855 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-10-21 23:43:12,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-10-21 23:43:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:12,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:12,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:13,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-21 23:43:13,069 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:13,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:13,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-10-21 23:43:13,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:13,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993657314] [2020-10-21 23:43:13,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993657314] [2020-10-21 23:43:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968482595] [2020-10-21 23:43:13,145 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:13,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:43:13,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:43:13,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:13,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:13,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 23:43:13,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [547140075] [2020-10-21 23:43:13,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:13,268 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:13,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-10-21 23:43:13,272 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:13,299 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:13,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:43:13,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:13,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:43:13,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:43:13,300 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-10-21 23:43:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:13,564 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-21 23:43:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 23:43:13,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-21 23:43:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:13,565 INFO L225 Difference]: With dead ends: 74 [2020-10-21 23:43:13,566 INFO L226 Difference]: Without dead ends: 69 [2020-10-21 23:43:13,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-21 23:43:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-10-21 23:43:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-21 23:43:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-10-21 23:43:13,570 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-10-21 23:43:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:13,570 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-10-21 23:43:13,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:43:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-10-21 23:43:13,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-21 23:43:13,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:13,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:13,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:13,781 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:13,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-10-21 23:43:13,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:13,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957997549] [2020-10-21 23:43:13,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:13,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957997549] [2020-10-21 23:43:13,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202710593] [2020-10-21 23:43:13,852 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:13,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 23:43:13,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:13,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:13,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-21 23:43:13,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832145609] [2020-10-21 23:43:13,949 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:13,950 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:13,952 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-10-21 23:43:13,952 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:14,030 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-21 23:43:14,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:14,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:14,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:14,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:43:14,032 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-10-21 23:43:14,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:14,289 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 23:43:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:14,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-21 23:43:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:14,291 INFO L225 Difference]: With dead ends: 82 [2020-10-21 23:43:14,291 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 23:43:14,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 23:43:14,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-21 23:43:14,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-21 23:43:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-21 23:43:14,295 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-10-21 23:43:14,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:14,295 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-21 23:43:14,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-21 23:43:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 23:43:14,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:14,296 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:14,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:14,506 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:14,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:14,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-10-21 23:43:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:14,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091029434] [2020-10-21 23:43:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:14,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091029434] [2020-10-21 23:43:14,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027721795] [2020-10-21 23:43:14,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:14,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:14,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:14,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:14,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:14,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 23:43:14,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1358971443] [2020-10-21 23:43:14,698 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:14,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:14,707 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-10-21 23:43:14,708 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:14,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:14,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:43:14,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:43:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:14,753 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-10-21 23:43:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:15,110 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-10-21 23:43:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:15,110 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-21 23:43:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:15,111 INFO L225 Difference]: With dead ends: 82 [2020-10-21 23:43:15,111 INFO L226 Difference]: Without dead ends: 73 [2020-10-21 23:43:15,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-21 23:43:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-21 23:43:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-10-21 23:43:15,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-21 23:43:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-10-21 23:43:15,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-10-21 23:43:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:15,116 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-10-21 23:43:15,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:43:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-10-21 23:43:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-21 23:43:15,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:15,117 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:15,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 23:43:15,326 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:15,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:15,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-10-21 23:43:15,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:15,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872653864] [2020-10-21 23:43:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:15,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872653864] [2020-10-21 23:43:15,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652392194] [2020-10-21 23:43:15,401 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:15,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:15,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:15,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:43:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:15,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:15,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:15,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:15,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-21 23:43:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2044722529] [2020-10-21 23:43:15,476 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:15,478 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:15,480 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-10-21 23:43:15,480 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:15,533 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:15,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:43:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:43:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:43:15,535 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-10-21 23:43:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:15,815 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-10-21 23:43:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 23:43:15,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-21 23:43:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:15,817 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:15,817 INFO L226 Difference]: Without dead ends: 67 [2020-10-21 23:43:15,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-21 23:43:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-10-21 23:43:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 23:43:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-21 23:43:15,822 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-21 23:43:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:15,822 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-21 23:43:15,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:43:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-21 23:43:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:15,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:15,823 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:16,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 23:43:16,032 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-10-21 23:43:16,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:16,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385651640] [2020-10-21 23:43:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385651640] [2020-10-21 23:43:16,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323382432] [2020-10-21 23:43:16,188 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:16,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-21 23:43:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:16,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:16,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-21 23:43:16,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1488913417] [2020-10-21 23:43:16,266 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:16,268 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:16,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-10-21 23:43:16,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:16,307 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:16,307 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:16,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:16,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:16,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:16,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:16,371 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-10-21 23:43:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:16,618 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-10-21 23:43:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:43:16,618 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 23:43:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:16,619 INFO L225 Difference]: With dead ends: 72 [2020-10-21 23:43:16,619 INFO L226 Difference]: Without dead ends: 66 [2020-10-21 23:43:16,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-21 23:43:16,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-10-21 23:43:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-21 23:43:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-21 23:43:16,624 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-10-21 23:43:16,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:16,624 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-21 23:43:16,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:16,624 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-21 23:43:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:16,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:16,625 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:16,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 23:43:16,832 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-10-21 23:43:16,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:16,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537556894] [2020-10-21 23:43:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:16,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537556894] [2020-10-21 23:43:16,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234230932] [2020-10-21 23:43:16,912 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:16,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:16,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:16,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:17,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 23:43:17,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1359449687] [2020-10-21 23:43:17,009 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:17,011 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:17,013 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-10-21 23:43:17,013 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:17,030 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:17,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:43:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:17,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:43:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:43:17,031 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-10-21 23:43:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:17,388 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-21 23:43:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 23:43:17,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-21 23:43:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:17,389 INFO L225 Difference]: With dead ends: 84 [2020-10-21 23:43:17,390 INFO L226 Difference]: Without dead ends: 79 [2020-10-21 23:43:17,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-21 23:43:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-21 23:43:17,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-10-21 23:43:17,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 23:43:17,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-10-21 23:43:17,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-10-21 23:43:17,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:17,396 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-10-21 23:43:17,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:43:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-10-21 23:43:17,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-21 23:43:17,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:17,397 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:17,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:17,606 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:17,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:17,606 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-10-21 23:43:17,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:17,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879299407] [2020-10-21 23:43:17,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879299407] [2020-10-21 23:43:17,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982910517] [2020-10-21 23:43:17,695 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:17,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-21 23:43:17,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-21 23:43:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:17,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:17,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:17,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-21 23:43:17,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1502346995] [2020-10-21 23:43:17,786 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:17,788 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:17,790 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-10-21 23:43:17,791 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:17,846 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:17,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:17,848 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-10-21 23:43:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:18,202 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 23:43:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:18,203 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-21 23:43:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:18,204 INFO L225 Difference]: With dead ends: 92 [2020-10-21 23:43:18,204 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:18,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-21 23:43:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-21 23:43:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-21 23:43:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-21 23:43:18,207 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-10-21 23:43:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:18,207 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-21 23:43:18,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-21 23:43:18,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 23:43:18,208 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:18,208 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:18,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:18,416 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-10-21 23:43:18,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:18,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623126651] [2020-10-21 23:43:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:18,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623126651] [2020-10-21 23:43:18,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552082314] [2020-10-21 23:43:18,502 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:18,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-21 23:43:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:18,600 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:18,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:18,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 23:43:18,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [560621815] [2020-10-21 23:43:18,611 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:18,612 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:18,615 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-10-21 23:43:18,615 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:18,649 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-10-21 23:43:18,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 23:43:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 23:43:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:18,650 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-10-21 23:43:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:19,072 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-21 23:43:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:19,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-21 23:43:19,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:19,074 INFO L225 Difference]: With dead ends: 92 [2020-10-21 23:43:19,074 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:19,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 23:43:19,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-10-21 23:43:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-21 23:43:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-10-21 23:43:19,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-10-21 23:43:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:19,077 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-10-21 23:43:19,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 23:43:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-10-21 23:43:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-21 23:43:19,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:19,078 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:19,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:19,282 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:19,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-10-21 23:43:19,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:19,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239485274] [2020-10-21 23:43:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:19,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239485274] [2020-10-21 23:43:19,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131948199] [2020-10-21 23:43:19,395 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-21 23:43:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:19,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:19,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:19,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-21 23:43:19,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [689751608] [2020-10-21 23:43:19,489 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:19,490 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:19,492 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-10-21 23:43:19,493 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:19,534 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:19,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:43:19,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:19,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:43:19,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:43:19,536 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-10-21 23:43:19,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:19,962 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-10-21 23:43:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-21 23:43:19,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-21 23:43:19,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:19,965 INFO L225 Difference]: With dead ends: 80 [2020-10-21 23:43:19,966 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 23:43:19,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:43:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 23:43:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-10-21 23:43:19,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 23:43:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-21 23:43:19,970 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-21 23:43:19,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:19,971 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-21 23:43:19,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:43:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-21 23:43:19,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:19,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:19,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:20,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-21 23:43:20,180 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-10-21 23:43:20,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:20,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185414580] [2020-10-21 23:43:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:20,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185414580] [2020-10-21 23:43:20,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282057189] [2020-10-21 23:43:20,319 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:20,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:20,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:20,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:20,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:20,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:20,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:20,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-21 23:43:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1374545257] [2020-10-21 23:43:20,389 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:20,391 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:20,395 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-10-21 23:43:20,396 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:20,432 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:20,433 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:20,469 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:20,469 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:20,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:20,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:20,499 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:20,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:20,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:20,501 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-10-21 23:43:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:20,806 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-21 23:43:20,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 23:43:20,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 23:43:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:20,808 INFO L225 Difference]: With dead ends: 80 [2020-10-21 23:43:20,808 INFO L226 Difference]: Without dead ends: 74 [2020-10-21 23:43:20,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:43:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-21 23:43:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-21 23:43:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 23:43:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-21 23:43:20,812 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-10-21 23:43:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:20,812 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-21 23:43:20,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-21 23:43:20,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:20,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:20,813 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:21,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 23:43:21,021 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-10-21 23:43:21,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:21,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342955370] [2020-10-21 23:43:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342955370] [2020-10-21 23:43:21,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466590617] [2020-10-21 23:43:21,121 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:21,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-21 23:43:21,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:43:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:21,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:21,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:21,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 23:43:21,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [184525907] [2020-10-21 23:43:21,208 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:21,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:21,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-10-21 23:43:21,213 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:21,244 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:21,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 23:43:21,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:21,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 23:43:21,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:43:21,245 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-10-21 23:43:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:21,730 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-21 23:43:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 23:43:21,731 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-21 23:43:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:21,732 INFO L225 Difference]: With dead ends: 94 [2020-10-21 23:43:21,732 INFO L226 Difference]: Without dead ends: 89 [2020-10-21 23:43:21,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 23:43:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-21 23:43:21,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-10-21 23:43:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-21 23:43:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-10-21 23:43:21,737 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-10-21 23:43:21,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:21,737 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-10-21 23:43:21,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 23:43:21,737 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-10-21 23:43:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-21 23:43:21,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:21,738 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:21,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 23:43:21,948 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-10-21 23:43:21,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:21,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776038293] [2020-10-21 23:43:21,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:22,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776038293] [2020-10-21 23:43:22,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287990912] [2020-10-21 23:43:22,071 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:22,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:22,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-21 23:43:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:22,154 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:22,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:22,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-21 23:43:22,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828032475] [2020-10-21 23:43:22,167 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:22,168 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:22,171 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-10-21 23:43:22,172 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:22,245 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-21 23:43:22,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:22,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:22,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:22,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:22,246 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-10-21 23:43:22,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:22,735 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 23:43:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:22,736 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-21 23:43:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:22,737 INFO L225 Difference]: With dead ends: 102 [2020-10-21 23:43:22,737 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 23:43:22,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:43:22,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 23:43:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-21 23:43:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 23:43:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-21 23:43:22,742 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-10-21 23:43:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:22,743 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-21 23:43:22,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-21 23:43:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 23:43:22,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:22,743 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:22,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 23:43:22,956 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:22,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-10-21 23:43:22,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:22,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086909269] [2020-10-21 23:43:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:23,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086909269] [2020-10-21 23:43:23,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400162478] [2020-10-21 23:43:23,081 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:23,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-21 23:43:23,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:23,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:23,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:23,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:23,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 23:43:23,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1561048401] [2020-10-21 23:43:23,177 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:23,179 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:23,183 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-10-21 23:43:23,184 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:23,232 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:23,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 23:43:23,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 23:43:23,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:23,233 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-10-21 23:43:23,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:23,820 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-10-21 23:43:23,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:23,821 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-21 23:43:23,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:23,822 INFO L225 Difference]: With dead ends: 102 [2020-10-21 23:43:23,822 INFO L226 Difference]: Without dead ends: 93 [2020-10-21 23:43:23,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 23:43:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-21 23:43:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-10-21 23:43:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-21 23:43:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-10-21 23:43:23,826 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-10-21 23:43:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:23,826 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-10-21 23:43:23,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 23:43:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-10-21 23:43:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-21 23:43:23,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:23,827 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:24,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 23:43:24,029 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-10-21 23:43:24,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:24,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638971168] [2020-10-21 23:43:24,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638971168] [2020-10-21 23:43:24,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819450040] [2020-10-21 23:43:24,148 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:24,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-21 23:43:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:24,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-21 23:43:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:24,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:24,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:24,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-21 23:43:24,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [988670630] [2020-10-21 23:43:24,241 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:24,243 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:24,246 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-10-21 23:43:24,246 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:24,304 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:24,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-21 23:43:24,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:24,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-21 23:43:24,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:43:24,305 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-10-21 23:43:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:24,831 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-10-21 23:43:24,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-21 23:43:24,832 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-21 23:43:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:24,833 INFO L225 Difference]: With dead ends: 88 [2020-10-21 23:43:24,833 INFO L226 Difference]: Without dead ends: 83 [2020-10-21 23:43:24,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:43:24,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-21 23:43:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-21 23:43:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-21 23:43:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-21 23:43:24,838 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-21 23:43:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:24,838 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-21 23:43:24,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-21 23:43:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-21 23:43:24,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:24,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:24,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:25,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:25,049 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:25,049 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-10-21 23:43:25,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746802596] [2020-10-21 23:43:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:25,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746802596] [2020-10-21 23:43:25,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78974997] [2020-10-21 23:43:25,220 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:25,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:25,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:25,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-21 23:43:25,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [654281508] [2020-10-21 23:43:25,282 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:25,284 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:25,289 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-10-21 23:43:25,289 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:25,295 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:25,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:25,374 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:25,375 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:25,379 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:25,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:25,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:25,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:25,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:25,380 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-10-21 23:43:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:25,727 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-10-21 23:43:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-21 23:43:25,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 23:43:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:25,729 INFO L225 Difference]: With dead ends: 88 [2020-10-21 23:43:25,729 INFO L226 Difference]: Without dead ends: 82 [2020-10-21 23:43:25,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:43:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-21 23:43:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-10-21 23:43:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 23:43:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-21 23:43:25,733 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-10-21 23:43:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:25,733 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-21 23:43:25,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-21 23:43:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:25,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:25,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:25,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-21 23:43:25,945 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-10-21 23:43:25,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:25,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787450780] [2020-10-21 23:43:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787450780] [2020-10-21 23:43:26,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442963221] [2020-10-21 23:43:26,073 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:26,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-21 23:43:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:26,153 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:26,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:26,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 23:43:26,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706579499] [2020-10-21 23:43:26,170 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:26,172 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:26,175 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-10-21 23:43:26,176 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:26,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-21 23:43:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-21 23:43:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:43:26,196 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-10-21 23:43:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:26,793 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-21 23:43:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:43:26,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-21 23:43:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:26,795 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:26,795 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 23:43:26,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 23:43:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 23:43:26,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-10-21 23:43:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-21 23:43:26,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-10-21 23:43:26,800 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-10-21 23:43:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:26,800 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-10-21 23:43:26,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-21 23:43:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-10-21 23:43:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-21 23:43:26,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:26,801 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:27,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:27,009 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:27,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:27,009 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-10-21 23:43:27,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:27,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612726725] [2020-10-21 23:43:27,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:27,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612726725] [2020-10-21 23:43:27,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440182516] [2020-10-21 23:43:27,131 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:27,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-21 23:43:27,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:27,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:27,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:27,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-21 23:43:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1480740548] [2020-10-21 23:43:27,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:27,234 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:27,238 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-10-21 23:43:27,238 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:27,312 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:27,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:27,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:27,314 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-10-21 23:43:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:27,953 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 23:43:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:27,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-21 23:43:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:27,956 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:27,956 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 23:43:27,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 23:43:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 23:43:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-21 23:43:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-21 23:43:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-21 23:43:27,963 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-10-21 23:43:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:27,963 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-21 23:43:27,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-21 23:43:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 23:43:27,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:27,964 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:28,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 23:43:28,165 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:28,165 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-10-21 23:43:28,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:28,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492812673] [2020-10-21 23:43:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:28,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492812673] [2020-10-21 23:43:28,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878124669] [2020-10-21 23:43:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:28,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:28,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:28,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:28,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:28,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 23:43:28,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1770781199] [2020-10-21 23:43:28,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:28,451 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:28,457 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-10-21 23:43:28,458 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:28,511 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-10-21 23:43:28,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 23:43:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 23:43:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:28,513 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-10-21 23:43:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:29,229 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-10-21 23:43:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 23:43:29,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-21 23:43:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:29,231 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:29,231 INFO L226 Difference]: Without dead ends: 103 [2020-10-21 23:43:29,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-10-21 23:43:29,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-21 23:43:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-21 23:43:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-21 23:43:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-10-21 23:43:29,236 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-10-21 23:43:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:29,236 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-10-21 23:43:29,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 23:43:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-10-21 23:43:29,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-21 23:43:29,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:29,237 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:29,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:29,446 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:29,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:29,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-10-21 23:43:29,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:29,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843753785] [2020-10-21 23:43:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:29,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843753785] [2020-10-21 23:43:29,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233121268] [2020-10-21 23:43:29,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:29,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-21 23:43:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-21 23:43:29,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:29,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:29,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:29,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-21 23:43:29,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1673427609] [2020-10-21 23:43:29,679 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:29,681 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:29,685 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-10-21 23:43:29,685 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:29,739 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:29,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-21 23:43:29,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-21 23:43:29,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:43:29,740 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-10-21 23:43:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:30,415 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-10-21 23:43:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-21 23:43:30,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-21 23:43:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:30,420 INFO L225 Difference]: With dead ends: 96 [2020-10-21 23:43:30,420 INFO L226 Difference]: Without dead ends: 91 [2020-10-21 23:43:30,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:43:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-21 23:43:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-10-21 23:43:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 23:43:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-21 23:43:30,424 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-21 23:43:30,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:30,424 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-21 23:43:30,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-21 23:43:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-21 23:43:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:30,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:30,425 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:30,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-21 23:43:30,631 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:30,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-10-21 23:43:30,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:30,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046452034] [2020-10-21 23:43:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:30,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046452034] [2020-10-21 23:43:30,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887157467] [2020-10-21 23:43:30,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:30,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-21 23:43:30,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:30,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:30,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:30,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:30,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:30,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-21 23:43:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [347409159] [2020-10-21 23:43:30,960 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:30,962 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:30,969 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-10-21 23:43:30,970 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:30,974 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:30,975 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:31,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:31,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:31,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:31,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:31,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:31,117 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-10-21 23:43:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:31,633 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-21 23:43:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-21 23:43:31,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 23:43:31,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:31,635 INFO L225 Difference]: With dead ends: 96 [2020-10-21 23:43:31,635 INFO L226 Difference]: Without dead ends: 90 [2020-10-21 23:43:31,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:43:31,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-21 23:43:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-10-21 23:43:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 23:43:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-21 23:43:31,639 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-10-21 23:43:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:31,639 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-21 23:43:31,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:31,640 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-21 23:43:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:31,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:31,640 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:31,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:31,841 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:31,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:31,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-10-21 23:43:31,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:31,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562060753] [2020-10-21 23:43:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562060753] [2020-10-21 23:43:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320552208] [2020-10-21 23:43:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:32,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-21 23:43:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:32,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:32,082 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:32,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:32,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 23:43:32,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460781520] [2020-10-21 23:43:32,083 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:32,085 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:32,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-10-21 23:43:32,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:32,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:32,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-21 23:43:32,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:32,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-21 23:43:32,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:43:32,137 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-10-21 23:43:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:32,858 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-21 23:43:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:43:32,858 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-21 23:43:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:32,859 INFO L225 Difference]: With dead ends: 114 [2020-10-21 23:43:32,859 INFO L226 Difference]: Without dead ends: 109 [2020-10-21 23:43:32,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-10-21 23:43:32,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-21 23:43:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-10-21 23:43:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-21 23:43:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-10-21 23:43:32,867 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-10-21 23:43:32,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:32,868 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-10-21 23:43:32,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-21 23:43:32,868 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-10-21 23:43:32,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-21 23:43:32,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:32,869 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:33,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-21 23:43:33,080 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:33,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:33,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-10-21 23:43:33,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:33,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181791030] [2020-10-21 23:43:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:33,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181791030] [2020-10-21 23:43:33,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378363968] [2020-10-21 23:43:33,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:33,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:33,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:33,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:33,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:33,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-21 23:43:33,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [677972809] [2020-10-21 23:43:33,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:33,340 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:33,345 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-10-21 23:43:33,345 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:33,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:33,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:43:33,410 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-10-21 23:43:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:34,173 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 23:43:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 23:43:34,174 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-21 23:43:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:34,175 INFO L225 Difference]: With dead ends: 122 [2020-10-21 23:43:34,175 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 23:43:34,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-10-21 23:43:34,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 23:43:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-10-21 23:43:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 23:43:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-21 23:43:34,180 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-10-21 23:43:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:34,181 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-21 23:43:34,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-21 23:43:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 23:43:34,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:34,181 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:34,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:34,394 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-10-21 23:43:34,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:34,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892574075] [2020-10-21 23:43:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:34,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:34,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892574075] [2020-10-21 23:43:34,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422998799] [2020-10-21 23:43:34,581 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:34,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-21 23:43:34,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:34,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:34,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 23:43:34,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [199264429] [2020-10-21 23:43:34,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:34,684 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:34,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-10-21 23:43:34,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:34,725 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:34,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 23:43:34,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:34,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 23:43:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:34,726 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-10-21 23:43:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:35,571 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-10-21 23:43:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:43:35,577 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-21 23:43:35,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:35,579 INFO L225 Difference]: With dead ends: 122 [2020-10-21 23:43:35,579 INFO L226 Difference]: Without dead ends: 113 [2020-10-21 23:43:35,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-10-21 23:43:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-21 23:43:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-10-21 23:43:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-21 23:43:35,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-10-21 23:43:35,583 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-10-21 23:43:35,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:35,583 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-10-21 23:43:35,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 23:43:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-10-21 23:43:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-21 23:43:35,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:35,584 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:35,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-21 23:43:35,793 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:35,793 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-10-21 23:43:35,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:35,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305312276] [2020-10-21 23:43:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:35,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305312276] [2020-10-21 23:43:35,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305309522] [2020-10-21 23:43:35,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:36,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:36,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:36,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-21 23:43:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:36,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:36,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:36,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-21 23:43:36,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322175468] [2020-10-21 23:43:36,081 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:36,083 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:36,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-10-21 23:43:36,089 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:36,136 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:36,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-21 23:43:36,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:36,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-21 23:43:36,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:43:36,137 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-10-21 23:43:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:36,958 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-10-21 23:43:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-21 23:43:36,959 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-21 23:43:36,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:36,960 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:36,960 INFO L226 Difference]: Without dead ends: 99 [2020-10-21 23:43:36,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-10-21 23:43:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-21 23:43:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-21 23:43:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 23:43:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-21 23:43:36,965 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-21 23:43:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:36,966 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-21 23:43:36,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-21 23:43:36,966 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-21 23:43:36,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:36,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:36,967 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:37,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 23:43:37,178 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-10-21 23:43:37,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:37,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857036688] [2020-10-21 23:43:37,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:37,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857036688] [2020-10-21 23:43:37,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262905644] [2020-10-21 23:43:37,431 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:37,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-21 23:43:37,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:37,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 23:43:37,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:37,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:37,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-21 23:43:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876260398] [2020-10-21 23:43:37,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:37,502 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:37,507 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-10-21 23:43:37,508 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:37,523 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:37,523 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:37,591 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:37,591 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:37,625 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:37,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:37,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:37,627 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-10-21 23:43:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:38,071 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-10-21 23:43:38,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-21 23:43:38,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 23:43:38,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:38,073 INFO L225 Difference]: With dead ends: 104 [2020-10-21 23:43:38,073 INFO L226 Difference]: Without dead ends: 98 [2020-10-21 23:43:38,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 23:43:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-21 23:43:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-21 23:43:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-21 23:43:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-21 23:43:38,078 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-10-21 23:43:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:38,078 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-21 23:43:38,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-21 23:43:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:38,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:38,079 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:38,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 23:43:38,288 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:38,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:38,288 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-10-21 23:43:38,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:38,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277436916] [2020-10-21 23:43:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277436916] [2020-10-21 23:43:38,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618502816] [2020-10-21 23:43:38,446 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:38,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-21 23:43:38,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:38,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:43:38,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:38,572 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:38,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:38,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 23:43:38,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1687007216] [2020-10-21 23:43:38,593 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:38,606 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:38,610 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-10-21 23:43:38,610 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:38,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:38,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-21 23:43:38,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-21 23:43:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:43:38,629 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-10-21 23:43:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:39,530 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-21 23:43:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 23:43:39,531 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-21 23:43:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:39,532 INFO L225 Difference]: With dead ends: 124 [2020-10-21 23:43:39,532 INFO L226 Difference]: Without dead ends: 119 [2020-10-21 23:43:39,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-10-21 23:43:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-21 23:43:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-10-21 23:43:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 23:43:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-10-21 23:43:39,536 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-10-21 23:43:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:39,537 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-10-21 23:43:39,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-21 23:43:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-10-21 23:43:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-21 23:43:39,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:39,537 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:39,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 23:43:39,738 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:39,739 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-10-21 23:43:39,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:39,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828396030] [2020-10-21 23:43:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:39,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828396030] [2020-10-21 23:43:39,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849359237] [2020-10-21 23:43:39,895 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:39,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-21 23:43:39,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:39,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:39,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:39,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-21 23:43:39,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [999294648] [2020-10-21 23:43:39,979 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:39,982 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:39,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-10-21 23:43:39,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:40,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:40,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:40,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:40,047 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-10-21 23:43:40,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:40,973 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 23:43:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:43:40,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-21 23:43:40,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:40,975 INFO L225 Difference]: With dead ends: 132 [2020-10-21 23:43:40,975 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 23:43:40,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-10-21 23:43:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 23:43:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-10-21 23:43:40,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-21 23:43:40,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-21 23:43:40,979 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-10-21 23:43:40,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:40,979 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-21 23:43:40,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:40,980 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-21 23:43:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 23:43:40,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:40,980 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:41,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 23:43:41,191 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:41,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:41,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-10-21 23:43:41,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:41,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941786887] [2020-10-21 23:43:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941786887] [2020-10-21 23:43:41,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034298411] [2020-10-21 23:43:41,391 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:41,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:41,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:43:41,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:41,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:41,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 23:43:41,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1273030353] [2020-10-21 23:43:41,497 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:41,499 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:41,503 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-10-21 23:43:41,503 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:41,542 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:41,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 23:43:41,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 23:43:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:41,543 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-10-21 23:43:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:42,553 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-10-21 23:43:42,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 23:43:42,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-21 23:43:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:42,555 INFO L225 Difference]: With dead ends: 132 [2020-10-21 23:43:42,555 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 23:43:42,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-10-21 23:43:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 23:43:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-10-21 23:43:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-21 23:43:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-10-21 23:43:42,560 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-10-21 23:43:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:42,560 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-10-21 23:43:42,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 23:43:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-10-21 23:43:42,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-21 23:43:42,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:42,561 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:42,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 23:43:42,771 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:42,772 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-10-21 23:43:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:42,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387659169] [2020-10-21 23:43:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:42,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387659169] [2020-10-21 23:43:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523009737] [2020-10-21 23:43:42,948 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:43,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-21 23:43:43,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:43,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-21 23:43:43,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:43,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:43,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:43,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-21 23:43:43,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1603530695] [2020-10-21 23:43:43,103 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:43,108 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:43,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-10-21 23:43:43,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:43,176 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:43,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-21 23:43:43,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:43,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-21 23:43:43,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:43:43,177 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-10-21 23:43:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:44,185 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-10-21 23:43:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-21 23:43:44,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-21 23:43:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:44,187 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:44,187 INFO L226 Difference]: Without dead ends: 107 [2020-10-21 23:43:44,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 23:43:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-21 23:43:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-21 23:43:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 23:43:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-21 23:43:44,194 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-21 23:43:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:44,194 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-21 23:43:44,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-21 23:43:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-21 23:43:44,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:44,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:44,195 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:44,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 23:43:44,396 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:44,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:44,396 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-10-21 23:43:44,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:44,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045369327] [2020-10-21 23:43:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:44,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045369327] [2020-10-21 23:43:44,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949769015] [2020-10-21 23:43:44,701 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:44,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:44,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:44,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-21 23:43:44,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038537894] [2020-10-21 23:43:44,773 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:44,776 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:44,783 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-10-21 23:43:44,783 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:44,828 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:44,829 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:44,861 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:44,861 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:44,893 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:44,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:44,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:44,894 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-10-21 23:43:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:45,442 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-21 23:43:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-21 23:43:45,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 23:43:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:45,444 INFO L225 Difference]: With dead ends: 112 [2020-10-21 23:43:45,444 INFO L226 Difference]: Without dead ends: 106 [2020-10-21 23:43:45,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:43:45,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-21 23:43:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-10-21 23:43:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 23:43:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-21 23:43:45,449 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-10-21 23:43:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:45,449 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-21 23:43:45,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:45,449 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-21 23:43:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:45,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:45,450 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:45,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:45,662 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-10-21 23:43:45,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:45,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034357613] [2020-10-21 23:43:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:45,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034357613] [2020-10-21 23:43:45,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669289091] [2020-10-21 23:43:45,892 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:45,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-21 23:43:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:43:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:45,985 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:46,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:46,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 23:43:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1865330031] [2020-10-21 23:43:46,004 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:46,007 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:46,013 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-10-21 23:43:46,014 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:46,034 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:46,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-21 23:43:46,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-21 23:43:46,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:43:46,036 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-10-21 23:43:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:47,080 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-21 23:43:47,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 23:43:47,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-21 23:43:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:47,082 INFO L225 Difference]: With dead ends: 134 [2020-10-21 23:43:47,082 INFO L226 Difference]: Without dead ends: 129 [2020-10-21 23:43:47,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-10-21 23:43:47,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-21 23:43:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-10-21 23:43:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-21 23:43:47,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-10-21 23:43:47,087 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-10-21 23:43:47,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:47,088 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-10-21 23:43:47,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-21 23:43:47,088 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-10-21 23:43:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-21 23:43:47,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:47,089 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:47,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:47,295 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:47,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:47,295 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-10-21 23:43:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:47,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498633121] [2020-10-21 23:43:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:47,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498633121] [2020-10-21 23:43:47,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176472727] [2020-10-21 23:43:47,505 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:47,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-21 23:43:47,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-21 23:43:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:47,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:47,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:47,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-21 23:43:47,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [415839712] [2020-10-21 23:43:47,612 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:47,614 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:47,620 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-10-21 23:43:47,620 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:47,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:47,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:47,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:47,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:47,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:47,707 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-10-21 23:43:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:48,820 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 23:43:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 23:43:48,821 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-21 23:43:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:48,823 INFO L225 Difference]: With dead ends: 142 [2020-10-21 23:43:48,823 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 23:43:48,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-10-21 23:43:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 23:43:48,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-10-21 23:43:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-21 23:43:48,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-21 23:43:48,827 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-10-21 23:43:48,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:48,827 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-21 23:43:48,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:48,827 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-21 23:43:48,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 23:43:48,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:48,828 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:49,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:49,028 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-10-21 23:43:49,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:49,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433104839] [2020-10-21 23:43:49,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:49,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433104839] [2020-10-21 23:43:49,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309959960] [2020-10-21 23:43:49,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:49,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:49,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:49,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 23:43:49,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2023551588] [2020-10-21 23:43:49,371 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:49,374 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:49,379 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-10-21 23:43:49,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:49,420 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:49,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 23:43:49,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:49,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 23:43:49,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:49,421 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-10-21 23:43:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:50,568 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-10-21 23:43:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 23:43:50,569 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-21 23:43:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:50,570 INFO L225 Difference]: With dead ends: 142 [2020-10-21 23:43:50,570 INFO L226 Difference]: Without dead ends: 133 [2020-10-21 23:43:50,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-10-21 23:43:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-21 23:43:50,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-10-21 23:43:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-21 23:43:50,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-10-21 23:43:50,573 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-10-21 23:43:50,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:50,573 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-10-21 23:43:50,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 23:43:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-10-21 23:43:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-21 23:43:50,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:50,574 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:50,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-21 23:43:50,783 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:50,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-10-21 23:43:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115726536] [2020-10-21 23:43:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:50,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115726536] [2020-10-21 23:43:51,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545491454] [2020-10-21 23:43:51,030 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:51,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:43:51,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:51,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-21 23:43:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:51,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:51,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:51,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-21 23:43:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [110524253] [2020-10-21 23:43:51,139 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:51,142 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:51,147 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-10-21 23:43:51,148 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:51,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:51,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-21 23:43:51,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:51,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-21 23:43:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:43:51,194 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-10-21 23:43:52,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:52,373 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-10-21 23:43:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-21 23:43:52,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-21 23:43:52,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:52,375 INFO L225 Difference]: With dead ends: 120 [2020-10-21 23:43:52,376 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 23:43:52,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-10-21 23:43:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 23:43:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-10-21 23:43:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-21 23:43:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-21 23:43:52,380 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-21 23:43:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:52,380 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-21 23:43:52,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-21 23:43:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-21 23:43:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:52,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:52,381 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:52,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:52,593 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:52,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:52,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-10-21 23:43:52,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:52,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974768322] [2020-10-21 23:43:52,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:52,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974768322] [2020-10-21 23:43:52,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282347957] [2020-10-21 23:43:52,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:53,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-21 23:43:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:53,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 23:43:53,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:53,006 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:53,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:53,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-21 23:43:53,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593150832] [2020-10-21 23:43:53,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:53,022 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:53,029 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-10-21 23:43:53,030 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:53,059 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:53,060 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:53,096 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:53,096 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:53,124 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:43:53,125 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:43:53,126 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:43:53,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 23:43:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 23:43:53,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:53,127 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-10-21 23:43:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:53,760 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-10-21 23:43:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-21 23:43:53,760 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 23:43:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:53,761 INFO L225 Difference]: With dead ends: 120 [2020-10-21 23:43:53,762 INFO L226 Difference]: Without dead ends: 114 [2020-10-21 23:43:53,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-10-21 23:43:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-21 23:43:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-10-21 23:43:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 23:43:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-21 23:43:53,765 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-10-21 23:43:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:53,765 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-21 23:43:53,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 23:43:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-21 23:43:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:53,766 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:53,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:53,966 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:53,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:53,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-10-21 23:43:53,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:53,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854838209] [2020-10-21 23:43:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:53,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:54,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854838209] [2020-10-21 23:43:54,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026593831] [2020-10-21 23:43:54,215 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:54,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:43:54,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 23:43:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:54,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:43:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:54,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:54,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 23:43:54,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575858301] [2020-10-21 23:43:54,322 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:54,325 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:54,331 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-10-21 23:43:54,331 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:54,348 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:43:54,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-21 23:43:54,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:54,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-21 23:43:54,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:43:54,348 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-10-21 23:43:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:55,576 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-21 23:43:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 23:43:55,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-21 23:43:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:55,578 INFO L225 Difference]: With dead ends: 144 [2020-10-21 23:43:55,579 INFO L226 Difference]: Without dead ends: 139 [2020-10-21 23:43:55,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-10-21 23:43:55,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-21 23:43:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-10-21 23:43:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-21 23:43:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-21 23:43:55,582 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-10-21 23:43:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:55,582 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-21 23:43:55,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-21 23:43:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-21 23:43:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-21 23:43:55,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:55,582 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:55,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 23:43:55,783 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-10-21 23:43:55,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:55,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676125599] [2020-10-21 23:43:55,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:55,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:56,002 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676125599] [2020-10-21 23:43:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704700238] [2020-10-21 23:43:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:56,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-21 23:43:56,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-21 23:43:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:56,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:56,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:56,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-21 23:43:56,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [332650883] [2020-10-21 23:43:56,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:56,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:56,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-10-21 23:43:56,110 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:56,175 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:56,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 23:43:56,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 23:43:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:43:56,176 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-10-21 23:43:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:57,458 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-21 23:43:57,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 23:43:57,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-21 23:43:57,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:57,460 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:43:57,461 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 23:43:57,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-10-21 23:43:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 23:43:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-10-21 23:43:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-21 23:43:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-21 23:43:57,465 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-10-21 23:43:57,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:57,465 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-21 23:43:57,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 23:43:57,465 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-21 23:43:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 23:43:57,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:57,466 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:57,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 23:43:57,676 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-10-21 23:43:57,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:57,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205345899] [2020-10-21 23:43:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:57,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205345899] [2020-10-21 23:43:57,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015261993] [2020-10-21 23:43:57,962 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:43:58,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-21 23:43:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:43:58,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 23:43:58,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:43:58,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:43:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:58,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:43:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 23:43:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1586946491] [2020-10-21 23:43:58,076 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:43:58,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:43:58,084 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-10-21 23:43:58,085 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:43:58,137 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:43:58,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 23:43:58,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:43:58,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 23:43:58,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:43:58,138 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-10-21 23:43:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:43:59,526 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-21 23:43:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-21 23:43:59,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-21 23:43:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:43:59,527 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:43:59,527 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 23:43:59,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-10-21 23:43:59,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 23:43:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-10-21 23:43:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-21 23:43:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-10-21 23:43:59,529 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-10-21 23:43:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:43:59,530 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-10-21 23:43:59,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 23:43:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-10-21 23:43:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-21 23:43:59,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:43:59,530 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:43:59,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 23:43:59,735 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:43:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:43:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-10-21 23:43:59,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:43:59,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10405181] [2020-10-21 23:43:59,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:43:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:43:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:43:59,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10405181] [2020-10-21 23:43:59,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868883353] [2020-10-21 23:43:59,984 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:00,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-21 23:44:00,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:00,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:00,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:00,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-21 23:44:00,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1799385619] [2020-10-21 23:44:00,122 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:00,126 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:00,134 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-10-21 23:44:00,134 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:00,183 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:00,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-21 23:44:00,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-21 23:44:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:44:00,185 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-10-21 23:44:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:01,593 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-10-21 23:44:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-21 23:44:01,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-21 23:44:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:01,596 INFO L225 Difference]: With dead ends: 128 [2020-10-21 23:44:01,596 INFO L226 Difference]: Without dead ends: 123 [2020-10-21 23:44:01,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-10-21 23:44:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-21 23:44:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-10-21 23:44:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 23:44:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-21 23:44:01,599 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-21 23:44:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:01,599 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-21 23:44:01,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-21 23:44:01,599 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-21 23:44:01,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 23:44:01,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:01,600 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:01,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:01,801 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:01,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:01,801 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-10-21 23:44:01,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:01,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760946498] [2020-10-21 23:44:01,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:02,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760946498] [2020-10-21 23:44:02,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182228498] [2020-10-21 23:44:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:02,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:44:02,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 23:44:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:02,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:02,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:02,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-21 23:44:02,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1056939850] [2020-10-21 23:44:02,278 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:02,282 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:02,291 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-10-21 23:44:02,291 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:02,308 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:02,309 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:02,400 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:44:02,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 23:44:02,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:02,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 23:44:02,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:44:02,401 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-10-21 23:44:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:03,151 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-21 23:44:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-21 23:44:03,152 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 23:44:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:03,153 INFO L225 Difference]: With dead ends: 128 [2020-10-21 23:44:03,153 INFO L226 Difference]: Without dead ends: 122 [2020-10-21 23:44:03,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-10-21 23:44:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-21 23:44:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-10-21 23:44:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 23:44:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-21 23:44:03,157 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-10-21 23:44:03,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:03,157 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-21 23:44:03,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 23:44:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-21 23:44:03,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 23:44:03,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:03,158 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:03,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:03,369 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:03,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:03,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-10-21 23:44:03,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:03,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889060671] [2020-10-21 23:44:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889060671] [2020-10-21 23:44:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001887644] [2020-10-21 23:44:03,669 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:03,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-21 23:44:03,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 23:44:03,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:03,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:03,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:03,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 23:44:03,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [522993102] [2020-10-21 23:44:03,792 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:03,796 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:03,803 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-10-21 23:44:03,803 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:03,828 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:03,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-21 23:44:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-21 23:44:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:44:03,829 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-10-21 23:44:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:05,289 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-21 23:44:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 23:44:05,289 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-21 23:44:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:05,291 INFO L225 Difference]: With dead ends: 154 [2020-10-21 23:44:05,291 INFO L226 Difference]: Without dead ends: 149 [2020-10-21 23:44:05,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-10-21 23:44:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-21 23:44:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-10-21 23:44:05,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-21 23:44:05,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-10-21 23:44:05,294 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-10-21 23:44:05,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:05,294 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-10-21 23:44:05,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-21 23:44:05,294 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-10-21 23:44:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-21 23:44:05,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:05,295 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:05,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-21 23:44:05,496 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:05,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:05,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-10-21 23:44:05,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:05,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994917667] [2020-10-21 23:44:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994917667] [2020-10-21 23:44:05,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051519798] [2020-10-21 23:44:05,845 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:05,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:44:05,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:05,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-21 23:44:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:05,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:06,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:06,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-21 23:44:06,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1453280961] [2020-10-21 23:44:06,014 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:06,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:06,037 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-10-21 23:44:06,038 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:06,160 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-10-21 23:44:06,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 23:44:06,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:06,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 23:44:06,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-10-21 23:44:06,162 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-10-21 23:44:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:07,705 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-21 23:44:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-21 23:44:07,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-21 23:44:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:07,706 INFO L225 Difference]: With dead ends: 162 [2020-10-21 23:44:07,707 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 23:44:07,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-10-21 23:44:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 23:44:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-10-21 23:44:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-21 23:44:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-21 23:44:07,710 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-10-21 23:44:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:07,711 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-21 23:44:07,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 23:44:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-21 23:44:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 23:44:07,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:07,711 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:07,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:07,921 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-10-21 23:44:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:07,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032282791] [2020-10-21 23:44:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:08,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032282791] [2020-10-21 23:44:08,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054238502] [2020-10-21 23:44:08,211 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:08,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-21 23:44:08,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:08,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 23:44:08,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:08,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:08,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:08,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 23:44:08,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1831979523] [2020-10-21 23:44:08,339 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:08,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:08,364 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-10-21 23:44:08,365 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:08,410 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:08,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 23:44:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 23:44:08,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-10-21 23:44:08,412 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-10-21 23:44:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:10,001 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-10-21 23:44:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-21 23:44:10,002 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-21 23:44:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:10,004 INFO L225 Difference]: With dead ends: 162 [2020-10-21 23:44:10,004 INFO L226 Difference]: Without dead ends: 153 [2020-10-21 23:44:10,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-10-21 23:44:10,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-21 23:44:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-10-21 23:44:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-21 23:44:10,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-10-21 23:44:10,007 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-10-21 23:44:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-10-21 23:44:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 23:44:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-10-21 23:44:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-21 23:44:10,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:10,008 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:10,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-21 23:44:10,209 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:10,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:10,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-10-21 23:44:10,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:10,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398263738] [2020-10-21 23:44:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:10,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398263738] [2020-10-21 23:44:10,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570253436] [2020-10-21 23:44:10,537 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:10,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-21 23:44:10,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-21 23:44:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:10,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:10,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-21 23:44:10,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1947382825] [2020-10-21 23:44:10,692 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:10,704 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:10,720 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-10-21 23:44:10,720 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:10,778 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:10,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-21 23:44:10,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-21 23:44:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-21 23:44:10,780 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-10-21 23:44:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:12,371 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-10-21 23:44:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-21 23:44:12,372 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-21 23:44:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:12,373 INFO L225 Difference]: With dead ends: 136 [2020-10-21 23:44:12,373 INFO L226 Difference]: Without dead ends: 131 [2020-10-21 23:44:12,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-10-21 23:44:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-21 23:44:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-21 23:44:12,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-21 23:44:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-21 23:44:12,377 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-21 23:44:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-21 23:44:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-21 23:44:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-21 23:44:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 23:44:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:12,378 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:12,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-21 23:44:12,590 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:12,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:12,590 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-10-21 23:44:12,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:12,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807747977] [2020-10-21 23:44:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:13,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807747977] [2020-10-21 23:44:13,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896067839] [2020-10-21 23:44:13,053 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:13,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 23:44:13,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:13,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:13,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-21 23:44:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1074149012] [2020-10-21 23:44:13,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:13,134 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:13,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-10-21 23:44:13,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:13,178 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:13,178 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:13,219 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:13,219 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:13,258 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:44:13,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 23:44:13,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:13,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 23:44:13,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-21 23:44:13,260 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-10-21 23:44:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:14,113 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-10-21 23:44:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-21 23:44:14,114 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 23:44:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:14,115 INFO L225 Difference]: With dead ends: 136 [2020-10-21 23:44:14,115 INFO L226 Difference]: Without dead ends: 130 [2020-10-21 23:44:14,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-10-21 23:44:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-21 23:44:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-10-21 23:44:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-21 23:44:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-10-21 23:44:14,120 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-10-21 23:44:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:14,120 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-10-21 23:44:14,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 23:44:14,120 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-10-21 23:44:14,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 23:44:14,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:14,121 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:14,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-21 23:44:14,326 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-10-21 23:44:14,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:14,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753395494] [2020-10-21 23:44:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:14,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753395494] [2020-10-21 23:44:14,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603848510] [2020-10-21 23:44:14,676 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:14,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:44:14,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:14,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-21 23:44:14,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:14,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:14,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:14,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 23:44:14,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1666441280] [2020-10-21 23:44:14,798 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:14,801 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:14,808 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-10-21 23:44:14,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:14,826 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:14,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-21 23:44:14,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:14,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-21 23:44:14,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-21 23:44:14,827 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-10-21 23:44:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:16,489 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-21 23:44:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-21 23:44:16,489 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-21 23:44:16,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:16,490 INFO L225 Difference]: With dead ends: 164 [2020-10-21 23:44:16,491 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 23:44:16,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-10-21 23:44:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 23:44:16,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-10-21 23:44:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 23:44:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-10-21 23:44:16,494 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-10-21 23:44:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:16,494 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-10-21 23:44:16,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-21 23:44:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-10-21 23:44:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-21 23:44:16,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:16,495 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:16,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-21 23:44:16,705 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-10-21 23:44:16,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:16,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140789141] [2020-10-21 23:44:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:17,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140789141] [2020-10-21 23:44:17,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949287176] [2020-10-21 23:44:17,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:17,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-21 23:44:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:17,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 23:44:17,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:17,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-21 23:44:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [525816513] [2020-10-21 23:44:17,192 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:17,196 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:17,206 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-10-21 23:44:17,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:17,283 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:17,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 23:44:17,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:17,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 23:44:17,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-10-21 23:44:17,284 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-10-21 23:44:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:18,981 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-21 23:44:18,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-21 23:44:18,982 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-21 23:44:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:18,983 INFO L225 Difference]: With dead ends: 172 [2020-10-21 23:44:18,983 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 23:44:18,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-10-21 23:44:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 23:44:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-10-21 23:44:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-21 23:44:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-10-21 23:44:18,987 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-10-21 23:44:18,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:18,988 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-10-21 23:44:18,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 23:44:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-10-21 23:44:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 23:44:18,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:18,989 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:19,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:19,197 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-10-21 23:44:19,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:19,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514823527] [2020-10-21 23:44:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:19,647 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:19,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514823527] [2020-10-21 23:44:19,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583769064] [2020-10-21 23:44:19,648 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:19,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:44:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:19,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 23:44:19,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:19,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:19,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:19,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 23:44:19,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1228632668] [2020-10-21 23:44:19,821 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:19,830 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:19,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-10-21 23:44:19,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:19,917 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-10-21 23:44:19,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 23:44:19,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:19,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 23:44:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:44:19,919 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-10-21 23:44:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:21,929 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-10-21 23:44:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-21 23:44:21,929 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-21 23:44:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:21,931 INFO L225 Difference]: With dead ends: 172 [2020-10-21 23:44:21,931 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 23:44:21,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-10-21 23:44:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 23:44:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-10-21 23:44:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-21 23:44:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-10-21 23:44:21,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-10-21 23:44:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:21,935 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-10-21 23:44:21,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 23:44:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-10-21 23:44:21,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-21 23:44:21,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:21,935 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:22,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-21 23:44:22,136 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-10-21 23:44:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:22,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128193458] [2020-10-21 23:44:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:22,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128193458] [2020-10-21 23:44:22,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778294367] [2020-10-21 23:44:22,507 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:22,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-21 23:44:22,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:22,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-21 23:44:22,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:22,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:22,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:22,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-21 23:44:22,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1026531770] [2020-10-21 23:44:22,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:22,661 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:22,675 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-10-21 23:44:22,676 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:22,733 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:22,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-21 23:44:22,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:22,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-21 23:44:22,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-21 23:44:22,734 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-10-21 23:44:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:24,535 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-10-21 23:44:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-21 23:44:24,535 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-21 23:44:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:24,537 INFO L225 Difference]: With dead ends: 144 [2020-10-21 23:44:24,537 INFO L226 Difference]: Without dead ends: 139 [2020-10-21 23:44:24,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-10-21 23:44:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-21 23:44:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-10-21 23:44:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 23:44:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-21 23:44:24,541 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-21 23:44:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:24,541 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-21 23:44:24,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-21 23:44:24,541 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-21 23:44:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 23:44:24,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:24,542 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:24,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:24,752 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-10-21 23:44:24,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:24,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142962770] [2020-10-21 23:44:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:25,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142962770] [2020-10-21 23:44:25,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966656433] [2020-10-21 23:44:25,292 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:25,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-21 23:44:25,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 23:44:25,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:25,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:25,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:25,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-21 23:44:25,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [404965104] [2020-10-21 23:44:25,377 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:25,381 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:25,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-10-21 23:44:25,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:25,407 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:25,407 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:25,508 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:25,509 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:25,510 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:44:25,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 23:44:25,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 23:44:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:44:25,511 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-10-21 23:44:26,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:26,433 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-21 23:44:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-21 23:44:26,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 23:44:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:26,434 INFO L225 Difference]: With dead ends: 144 [2020-10-21 23:44:26,434 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 23:44:26,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-10-21 23:44:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 23:44:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-10-21 23:44:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 23:44:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-10-21 23:44:26,437 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-10-21 23:44:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:26,437 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-10-21 23:44:26,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 23:44:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-10-21 23:44:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 23:44:26,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:26,438 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:26,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-10-21 23:44:26,639 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-10-21 23:44:26,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:26,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043393123] [2020-10-21 23:44:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043393123] [2020-10-21 23:44:27,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386370029] [2020-10-21 23:44:27,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 23:44:27,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:27,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:27,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:27,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 23:44:27,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [985180941] [2020-10-21 23:44:27,177 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:27,182 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:27,193 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-10-21 23:44:27,194 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:27,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:27,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-21 23:44:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:27,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-21 23:44:27,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:44:27,224 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-10-21 23:44:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:29,122 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-10-21 23:44:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 23:44:29,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-21 23:44:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:29,123 INFO L225 Difference]: With dead ends: 174 [2020-10-21 23:44:29,124 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 23:44:29,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-10-21 23:44:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 23:44:29,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-10-21 23:44:29,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-21 23:44:29,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-10-21 23:44:29,127 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-10-21 23:44:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:29,127 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-10-21 23:44:29,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-21 23:44:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-10-21 23:44:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-21 23:44:29,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:29,128 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:29,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:29,328 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:29,329 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-10-21 23:44:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:29,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748699512] [2020-10-21 23:44:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748699512] [2020-10-21 23:44:29,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65118169] [2020-10-21 23:44:29,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:29,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:44:29,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:29,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-21 23:44:29,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:29,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:29,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:29,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-21 23:44:29,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1235717748] [2020-10-21 23:44:29,905 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:29,912 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:29,929 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-10-21 23:44:29,930 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:30,017 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:30,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 23:44:30,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:30,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 23:44:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-10-21 23:44:30,018 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-10-21 23:44:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:31,969 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-21 23:44:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-21 23:44:31,970 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-21 23:44:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:31,971 INFO L225 Difference]: With dead ends: 182 [2020-10-21 23:44:31,971 INFO L226 Difference]: Without dead ends: 173 [2020-10-21 23:44:31,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-10-21 23:44:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-21 23:44:31,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-10-21 23:44:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 23:44:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-10-21 23:44:31,975 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-10-21 23:44:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:31,975 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-10-21 23:44:31,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 23:44:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-10-21 23:44:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:44:31,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:31,976 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:32,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-10-21 23:44:32,178 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-10-21 23:44:32,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:32,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847157361] [2020-10-21 23:44:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847157361] [2020-10-21 23:44:32,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449682255] [2020-10-21 23:44:32,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:32,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-21 23:44:32,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:32,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 23:44:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:32,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:32,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:32,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 23:44:32,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838758452] [2020-10-21 23:44:32,754 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:32,757 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:32,766 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-10-21 23:44:32,766 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:32,815 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:32,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 23:44:32,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:32,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 23:44:32,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 23:44:32,817 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-10-21 23:44:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:34,905 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-10-21 23:44:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-21 23:44:34,906 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-21 23:44:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:34,908 INFO L225 Difference]: With dead ends: 182 [2020-10-21 23:44:34,908 INFO L226 Difference]: Without dead ends: 173 [2020-10-21 23:44:34,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-10-21 23:44:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-21 23:44:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-10-21 23:44:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-21 23:44:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-10-21 23:44:34,911 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-10-21 23:44:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:34,911 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-10-21 23:44:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 23:44:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-10-21 23:44:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-21 23:44:34,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:34,912 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:35,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:35,123 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:35,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:35,123 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-10-21 23:44:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:35,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969525769] [2020-10-21 23:44:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:35,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969525769] [2020-10-21 23:44:35,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647217978] [2020-10-21 23:44:35,575 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:35,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:44:35,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-21 23:44:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:35,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:35,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:35,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-21 23:44:35,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [753797932] [2020-10-21 23:44:35,703 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:35,706 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:35,716 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-10-21 23:44:35,716 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:35,764 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:35,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-21 23:44:35,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:35,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-21 23:44:35,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-21 23:44:35,765 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-10-21 23:44:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:37,917 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-10-21 23:44:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-21 23:44:37,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-21 23:44:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:37,920 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:44:37,920 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 23:44:37,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-10-21 23:44:37,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 23:44:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-10-21 23:44:37,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-21 23:44:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-10-21 23:44:37,923 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-10-21 23:44:37,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:37,924 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-10-21 23:44:37,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-21 23:44:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-10-21 23:44:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 23:44:37,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:37,924 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:38,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-21 23:44:38,126 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:38,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:38,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-10-21 23:44:38,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:38,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748490544] [2020-10-21 23:44:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748490544] [2020-10-21 23:44:38,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552058623] [2020-10-21 23:44:38,768 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:38,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-21 23:44:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:38,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 23:44:38,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:38,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:38,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:38,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-10-21 23:44:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [84235772] [2020-10-21 23:44:38,850 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:38,854 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:38,865 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-10-21 23:44:38,865 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:38,896 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:38,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:38,984 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:44:38,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 23:44:38,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:38,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 23:44:38,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 23:44:38,985 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-10-21 23:44:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:40,081 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-10-21 23:44:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-21 23:44:40,081 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 23:44:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:40,083 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:44:40,083 INFO L226 Difference]: Without dead ends: 146 [2020-10-21 23:44:40,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-10-21 23:44:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-21 23:44:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-10-21 23:44:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-21 23:44:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-10-21 23:44:40,086 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-10-21 23:44:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:40,087 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-10-21 23:44:40,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 23:44:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-10-21 23:44:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 23:44:40,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:40,087 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:40,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:40,288 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:40,289 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-10-21 23:44:40,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:40,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939310566] [2020-10-21 23:44:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:40,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939310566] [2020-10-21 23:44:40,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756438641] [2020-10-21 23:44:40,767 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:40,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-21 23:44:40,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:40,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 23:44:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:40,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:40,917 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:40,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:40,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 23:44:40,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [766863138] [2020-10-21 23:44:40,919 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:40,923 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:40,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-10-21 23:44:40,933 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:40,951 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:40,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-21 23:44:40,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:40,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-21 23:44:40,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-10-21 23:44:40,953 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-10-21 23:44:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:43,150 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-10-21 23:44:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 23:44:43,151 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-10-21 23:44:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:43,152 INFO L225 Difference]: With dead ends: 184 [2020-10-21 23:44:43,152 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 23:44:43,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-10-21 23:44:43,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 23:44:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-10-21 23:44:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-21 23:44:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-10-21 23:44:43,155 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-10-21 23:44:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:43,156 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-10-21 23:44:43,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-21 23:44:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-10-21 23:44:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-21 23:44:43,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:43,156 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:43,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-21 23:44:43,366 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-10-21 23:44:43,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:43,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155390162] [2020-10-21 23:44:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:43,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155390162] [2020-10-21 23:44:43,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548195557] [2020-10-21 23:44:43,850 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-21 23:44:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:43,945 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:44:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:43,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:43,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-10-21 23:44:43,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [82878799] [2020-10-21 23:44:43,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:43,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:43,985 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-10-21 23:44:43,985 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:44,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:44,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 23:44:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 23:44:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 23:44:44,062 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-10-21 23:44:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:46,340 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-21 23:44:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-21 23:44:46,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-10-21 23:44:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:46,343 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:44:46,343 INFO L226 Difference]: Without dead ends: 183 [2020-10-21 23:44:46,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-10-21 23:44:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-21 23:44:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-10-21 23:44:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-21 23:44:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-10-21 23:44:46,346 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-10-21 23:44:46,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:46,346 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-10-21 23:44:46,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 23:44:46,346 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-10-21 23:44:46,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 23:44:46,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:46,347 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:46,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-21 23:44:46,548 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:46,548 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-10-21 23:44:46,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:46,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620176924] [2020-10-21 23:44:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:47,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620176924] [2020-10-21 23:44:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639093509] [2020-10-21 23:44:47,024 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:44:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 23:44:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:47,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:47,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 23:44:47,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466669371] [2020-10-21 23:44:47,158 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:47,163 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:47,179 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-10-21 23:44:47,179 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:47,240 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:44:47,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 23:44:47,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:47,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 23:44:47,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:44:47,242 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-10-21 23:44:49,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:49,598 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-10-21 23:44:49,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-21 23:44:49,603 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-10-21 23:44:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:49,605 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:44:49,605 INFO L226 Difference]: Without dead ends: 183 [2020-10-21 23:44:49,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-10-21 23:44:49,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-21 23:44:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-10-21 23:44:49,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-21 23:44:49,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-10-21 23:44:49,608 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-10-21 23:44:49,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:49,608 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-10-21 23:44:49,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 23:44:49,609 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-10-21 23:44:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-21 23:44:49,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:49,609 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:49,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-21 23:44:49,810 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-10-21 23:44:49,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:49,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129802189] [2020-10-21 23:44:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:50,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129802189] [2020-10-21 23:44:50,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473360253] [2020-10-21 23:44:50,324 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:50,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-10-21 23:44:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:50,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-21 23:44:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:50,442 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:50,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:50,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-10-21 23:44:50,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1869810023] [2020-10-21 23:44:50,475 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:50,479 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:50,491 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-10-21 23:44:50,491 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:50,539 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:50,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-21 23:44:50,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-21 23:44:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-10-21 23:44:50,540 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-10-21 23:44:52,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:52,918 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-10-21 23:44:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-21 23:44:52,919 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-10-21 23:44:52,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:52,920 INFO L225 Difference]: With dead ends: 160 [2020-10-21 23:44:52,921 INFO L226 Difference]: Without dead ends: 155 [2020-10-21 23:44:52,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-10-21 23:44:52,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-21 23:44:52,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-21 23:44:52,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-21 23:44:52,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-10-21 23:44:52,925 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-10-21 23:44:52,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:52,925 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-10-21 23:44:52,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-21 23:44:52,925 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-10-21 23:44:52,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 23:44:52,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:52,926 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:53,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:53,127 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:53,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-10-21 23:44:53,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:53,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645667215] [2020-10-21 23:44:53,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645667215] [2020-10-21 23:44:53,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255665394] [2020-10-21 23:44:53,850 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:53,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:44:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:53,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 23:44:53,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:53,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:53,923 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:53,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:53,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-10-21 23:44:53,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1363911466] [2020-10-21 23:44:53,923 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:53,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:53,944 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-10-21 23:44:53,944 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:53,955 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:53,955 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:54,000 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:44:54,001 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:44:54,064 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:44:54,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 23:44:54,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 23:44:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:44:54,065 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-10-21 23:44:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:55,623 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-10-21 23:44:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-21 23:44:55,624 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 23:44:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:55,625 INFO L225 Difference]: With dead ends: 160 [2020-10-21 23:44:55,625 INFO L226 Difference]: Without dead ends: 154 [2020-10-21 23:44:55,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-10-21 23:44:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-21 23:44:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-10-21 23:44:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-21 23:44:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-10-21 23:44:55,628 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-10-21 23:44:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:55,629 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-10-21 23:44:55,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 23:44:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-10-21 23:44:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 23:44:55,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:55,629 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:55,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:55,837 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:55,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-10-21 23:44:55,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:55,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203825176] [2020-10-21 23:44:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203825176] [2020-10-21 23:44:56,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062429859] [2020-10-21 23:44:56,378 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:56,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-10-21 23:44:56,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:56,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-10-21 23:44:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:56,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:44:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:56,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:56,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 23:44:56,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [365720357] [2020-10-21 23:44:56,515 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:56,520 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:56,535 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-10-21 23:44:56,535 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:44:56,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:44:56,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-21 23:44:56,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:44:56,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-21 23:44:56,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-10-21 23:44:56,559 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-10-21 23:44:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:44:59,034 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-10-21 23:44:59,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 23:44:59,035 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-10-21 23:44:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:44:59,036 INFO L225 Difference]: With dead ends: 194 [2020-10-21 23:44:59,037 INFO L226 Difference]: Without dead ends: 189 [2020-10-21 23:44:59,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-10-21 23:44:59,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-21 23:44:59,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-10-21 23:44:59,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 23:44:59,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-10-21 23:44:59,041 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-10-21 23:44:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:44:59,041 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-10-21 23:44:59,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-21 23:44:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-10-21 23:44:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-21 23:44:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:44:59,042 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:44:59,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:59,252 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:44:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:44:59,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-10-21 23:44:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:44:59,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123143085] [2020-10-21 23:44:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:44:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:44:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:59,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123143085] [2020-10-21 23:44:59,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508164492] [2020-10-21 23:44:59,795 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:44:59,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-10-21 23:44:59,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:44:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 23:44:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:44:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:44:59,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:44:59,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-10-21 23:44:59,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [47020191] [2020-10-21 23:44:59,942 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:44:59,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:44:59,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-10-21 23:44:59,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:00,046 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-10-21 23:45:00,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 23:45:00,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:00,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 23:45:00,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 23:45:00,048 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-10-21 23:45:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:02,627 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-21 23:45:02,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-21 23:45:02,628 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-10-21 23:45:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:02,629 INFO L225 Difference]: With dead ends: 202 [2020-10-21 23:45:02,629 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 23:45:02,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-10-21 23:45:02,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 23:45:02,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-10-21 23:45:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-21 23:45:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-10-21 23:45:02,632 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-10-21 23:45:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:02,633 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-10-21 23:45:02,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 23:45:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-10-21 23:45:02,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 23:45:02,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:02,634 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:02,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-10-21 23:45:02,838 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:02,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-10-21 23:45:02,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:02,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748259680] [2020-10-21 23:45:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:03,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748259680] [2020-10-21 23:45:03,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477082124] [2020-10-21 23:45:03,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:03,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 23:45:03,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:03,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:45:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:03,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:03,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 23:45:03,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2107185065] [2020-10-21 23:45:03,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:03,573 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:03,585 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-10-21 23:45:03,586 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:03,643 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:45:03,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 23:45:03,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:03,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 23:45:03,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:45:03,644 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-10-21 23:45:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:06,338 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-10-21 23:45:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 23:45:06,339 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-10-21 23:45:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:06,340 INFO L225 Difference]: With dead ends: 202 [2020-10-21 23:45:06,340 INFO L226 Difference]: Without dead ends: 193 [2020-10-21 23:45:06,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-10-21 23:45:06,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-21 23:45:06,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-10-21 23:45:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-21 23:45:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-10-21 23:45:06,344 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-10-21 23:45:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:06,344 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-10-21 23:45:06,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 23:45:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-10-21 23:45:06,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-21 23:45:06,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:06,345 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:06,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:06,546 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:06,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:06,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-10-21 23:45:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:06,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753695395] [2020-10-21 23:45:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:07,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753695395] [2020-10-21 23:45:07,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323614970] [2020-10-21 23:45:07,140 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:07,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:45:07,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:07,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-10-21 23:45:07,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:07,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:07,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:07,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-10-21 23:45:07,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1471135526] [2020-10-21 23:45:07,285 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:07,290 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:07,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-10-21 23:45:07,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:07,343 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-21 23:45:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-21 23:45:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-10-21 23:45:07,344 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-10-21 23:45:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:10,059 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-10-21 23:45:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-21 23:45:10,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-10-21 23:45:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:10,062 INFO L225 Difference]: With dead ends: 168 [2020-10-21 23:45:10,062 INFO L226 Difference]: Without dead ends: 163 [2020-10-21 23:45:10,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-10-21 23:45:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-21 23:45:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-10-21 23:45:10,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-21 23:45:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-10-21 23:45:10,065 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-10-21 23:45:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:10,065 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-10-21 23:45:10,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-21 23:45:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-10-21 23:45:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 23:45:10,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:10,066 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:10,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:10,273 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:10,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:10,273 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-10-21 23:45:10,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:10,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988903082] [2020-10-21 23:45:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988903082] [2020-10-21 23:45:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203915131] [2020-10-21 23:45:11,087 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:11,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-21 23:45:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:11,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 23:45:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:11,166 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:11,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:11,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-10-21 23:45:11,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [114126610] [2020-10-21 23:45:11,185 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:11,189 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:11,207 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-10-21 23:45:11,207 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:11,211 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:11,211 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:11,298 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:11,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:11,332 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:45:11,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 23:45:11,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:11,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 23:45:11,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:45:11,333 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-10-21 23:45:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:12,875 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-10-21 23:45:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-21 23:45:12,875 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 23:45:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:12,876 INFO L225 Difference]: With dead ends: 168 [2020-10-21 23:45:12,877 INFO L226 Difference]: Without dead ends: 162 [2020-10-21 23:45:12,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-10-21 23:45:12,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-21 23:45:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-10-21 23:45:12,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 23:45:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-10-21 23:45:12,880 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-10-21 23:45:12,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:12,880 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-10-21 23:45:12,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 23:45:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-10-21 23:45:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 23:45:12,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:12,881 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:13,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:13,081 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:13,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:13,082 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-10-21 23:45:13,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:13,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452027063] [2020-10-21 23:45:13,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:13,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452027063] [2020-10-21 23:45:13,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571603160] [2020-10-21 23:45:13,709 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:13,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:45:13,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:13,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-21 23:45:13,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:13,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:13,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:13,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 23:45:13,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1439072307] [2020-10-21 23:45:13,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:13,872 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:13,885 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-10-21 23:45:13,885 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:13,903 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:13,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-21 23:45:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:13,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-21 23:45:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-10-21 23:45:13,905 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-10-21 23:45:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:16,748 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-10-21 23:45:16,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 23:45:16,749 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-10-21 23:45:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:16,751 INFO L225 Difference]: With dead ends: 204 [2020-10-21 23:45:16,751 INFO L226 Difference]: Without dead ends: 199 [2020-10-21 23:45:16,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-10-21 23:45:16,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-21 23:45:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-10-21 23:45:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 23:45:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-10-21 23:45:16,755 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-10-21 23:45:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:16,755 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-10-21 23:45:16,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-21 23:45:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-10-21 23:45:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-21 23:45:16,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:16,756 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:16,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-21 23:45:16,964 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:16,964 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-10-21 23:45:16,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:16,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363096370] [2020-10-21 23:45:16,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:17,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363096370] [2020-10-21 23:45:17,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187177923] [2020-10-21 23:45:17,599 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:17,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-10-21 23:45:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:17,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-10-21 23:45:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:17,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:45:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:17,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:17,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-10-21 23:45:17,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [618590622] [2020-10-21 23:45:17,743 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:17,746 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:17,760 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-10-21 23:45:17,761 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:17,846 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:45:17,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 23:45:17,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:17,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 23:45:17,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 23:45:17,848 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-10-21 23:45:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:20,775 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-21 23:45:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-21 23:45:20,776 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-10-21 23:45:20,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:20,777 INFO L225 Difference]: With dead ends: 212 [2020-10-21 23:45:20,777 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 23:45:20,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-10-21 23:45:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 23:45:20,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-10-21 23:45:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:45:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-10-21 23:45:20,781 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-10-21 23:45:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:20,781 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-10-21 23:45:20,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 23:45:20,781 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-10-21 23:45:20,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 23:45:20,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:20,782 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:20,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:20,986 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:20,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-10-21 23:45:20,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:20,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233390728] [2020-10-21 23:45:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:21,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233390728] [2020-10-21 23:45:21,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181868428] [2020-10-21 23:45:21,664 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:21,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-10-21 23:45:21,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 23:45:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:21,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:21,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 23:45:21,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [696054436] [2020-10-21 23:45:21,825 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:21,828 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:21,859 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-10-21 23:45:21,859 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:21,919 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-10-21 23:45:21,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 23:45:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 23:45:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 23:45:21,920 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-10-21 23:45:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:25,001 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-10-21 23:45:25,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-21 23:45:25,001 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-10-21 23:45:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:25,002 INFO L225 Difference]: With dead ends: 212 [2020-10-21 23:45:25,003 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 23:45:25,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-10-21 23:45:25,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 23:45:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-10-21 23:45:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 23:45:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 23:45:25,006 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-10-21 23:45:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:25,007 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 23:45:25,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 23:45:25,007 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 23:45:25,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-21 23:45:25,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:25,007 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:25,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-21 23:45:25,208 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:25,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-10-21 23:45:25,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:25,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501935581] [2020-10-21 23:45:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:25,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501935581] [2020-10-21 23:45:25,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346625001] [2020-10-21 23:45:25,898 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:25,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-21 23:45:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:26,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:26,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:26,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-10-21 23:45:26,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1861337679] [2020-10-21 23:45:26,043 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:26,047 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:26,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-10-21 23:45:26,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:26,115 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:26,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-21 23:45:26,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-21 23:45:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-10-21 23:45:26,116 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-10-21 23:45:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:29,140 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-10-21 23:45:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-21 23:45:29,140 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-10-21 23:45:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:29,141 INFO L225 Difference]: With dead ends: 176 [2020-10-21 23:45:29,141 INFO L226 Difference]: Without dead ends: 171 [2020-10-21 23:45:29,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-10-21 23:45:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-21 23:45:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-10-21 23:45:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 23:45:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-10-21 23:45:29,146 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-10-21 23:45:29,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:29,146 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-10-21 23:45:29,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-21 23:45:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-10-21 23:45:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 23:45:29,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:29,146 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:29,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:29,347 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-10-21 23:45:29,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:29,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336776858] [2020-10-21 23:45:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:30,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336776858] [2020-10-21 23:45:30,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71013590] [2020-10-21 23:45:30,291 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:30,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:45:30,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 23:45:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:30,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:30,380 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:30,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:30,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-10-21 23:45:30,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2133358090] [2020-10-21 23:45:30,381 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:30,385 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:30,405 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-10-21 23:45:30,405 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:30,409 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:30,409 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:30,497 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:30,497 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:30,533 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:45:30,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 23:45:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 23:45:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 23:45:30,534 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-10-21 23:45:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:32,107 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-10-21 23:45:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-21 23:45:32,108 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 23:45:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:32,109 INFO L225 Difference]: With dead ends: 176 [2020-10-21 23:45:32,109 INFO L226 Difference]: Without dead ends: 170 [2020-10-21 23:45:32,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-10-21 23:45:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-21 23:45:32,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-10-21 23:45:32,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 23:45:32,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-10-21 23:45:32,113 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-10-21 23:45:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:32,114 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-10-21 23:45:32,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 23:45:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-10-21 23:45:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 23:45:32,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:32,114 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:32,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:32,326 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:32,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-10-21 23:45:32,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:32,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635603700] [2020-10-21 23:45:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:33,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635603700] [2020-10-21 23:45:33,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290784808] [2020-10-21 23:45:33,043 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:33,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-10-21 23:45:33,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:33,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 23:45:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:33,164 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:33,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:33,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 23:45:33,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1981548259] [2020-10-21 23:45:33,205 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:33,208 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:33,222 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-10-21 23:45:33,222 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:33,241 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:33,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-21 23:45:33,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:33,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-21 23:45:33,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-10-21 23:45:33,243 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-10-21 23:45:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:36,421 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-10-21 23:45:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 23:45:36,422 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-10-21 23:45:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:36,423 INFO L225 Difference]: With dead ends: 214 [2020-10-21 23:45:36,423 INFO L226 Difference]: Without dead ends: 209 [2020-10-21 23:45:36,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-10-21 23:45:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-21 23:45:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-10-21 23:45:36,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-21 23:45:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-10-21 23:45:36,427 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-10-21 23:45:36,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:36,427 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-10-21 23:45:36,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-21 23:45:36,427 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-10-21 23:45:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-21 23:45:36,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:36,428 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:36,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:36,638 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-10-21 23:45:36,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:36,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841084046] [2020-10-21 23:45:36,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:37,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841084046] [2020-10-21 23:45:37,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334245743] [2020-10-21 23:45:37,365 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:37,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:45:37,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-10-21 23:45:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:37,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:45:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:37,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:37,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-10-21 23:45:37,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1716010139] [2020-10-21 23:45:37,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:37,508 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:37,529 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-10-21 23:45:37,529 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:37,628 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:45:37,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 23:45:37,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 23:45:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 23:45:37,629 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-10-21 23:45:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:40,962 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-21 23:45:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-21 23:45:40,963 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-10-21 23:45:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:40,964 INFO L225 Difference]: With dead ends: 222 [2020-10-21 23:45:40,964 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 23:45:40,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-10-21 23:45:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 23:45:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-10-21 23:45:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-21 23:45:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-10-21 23:45:40,970 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-10-21 23:45:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:40,970 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-10-21 23:45:40,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 23:45:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-10-21 23:45:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 23:45:40,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:40,971 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:41,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:41,182 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:41,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-10-21 23:45:41,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:41,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550460159] [2020-10-21 23:45:41,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:41,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550460159] [2020-10-21 23:45:41,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051291168] [2020-10-21 23:45:41,947 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:42,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-10-21 23:45:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 23:45:42,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:42,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:45:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:42,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:42,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 23:45:42,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1200712429] [2020-10-21 23:45:42,124 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:42,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:42,157 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-10-21 23:45:42,157 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:42,238 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:45:42,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 23:45:42,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:42,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 23:45:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 23:45:42,239 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-10-21 23:45:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:45,706 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-10-21 23:45:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-21 23:45:45,706 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-10-21 23:45:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:45,707 INFO L225 Difference]: With dead ends: 222 [2020-10-21 23:45:45,708 INFO L226 Difference]: Without dead ends: 213 [2020-10-21 23:45:45,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-10-21 23:45:45,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-21 23:45:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-10-21 23:45:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-21 23:45:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-21 23:45:45,711 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-10-21 23:45:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:45,712 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-21 23:45:45,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 23:45:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-21 23:45:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-21 23:45:45,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:45,713 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:45,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:45,914 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:45,914 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-10-21 23:45:45,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:45,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926368032] [2020-10-21 23:45:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926368032] [2020-10-21 23:45:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250373830] [2020-10-21 23:45:46,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:46,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-10-21 23:45:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:46,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-10-21 23:45:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:46,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:46,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:46,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-10-21 23:45:46,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [259494435] [2020-10-21 23:45:46,844 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:46,849 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:46,870 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-10-21 23:45:46,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:46,930 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:46,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-21 23:45:46,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-21 23:45:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-10-21 23:45:46,931 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-10-21 23:45:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:50,371 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-10-21 23:45:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-21 23:45:50,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-10-21 23:45:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:50,373 INFO L225 Difference]: With dead ends: 184 [2020-10-21 23:45:50,373 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 23:45:50,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-10-21 23:45:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 23:45:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-10-21 23:45:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-21 23:45:50,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-10-21 23:45:50,377 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-10-21 23:45:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:50,378 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-10-21 23:45:50,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-21 23:45:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-10-21 23:45:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 23:45:50,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:50,379 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:50,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:50,579 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-10-21 23:45:50,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:50,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507608511] [2020-10-21 23:45:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:51,657 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:51,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507608511] [2020-10-21 23:45:51,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066928354] [2020-10-21 23:45:51,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:51,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 23:45:51,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:51,730 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:51,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:51,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-10-21 23:45:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593014387] [2020-10-21 23:45:51,746 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:51,751 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:51,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-10-21 23:45:51,772 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:51,776 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:51,776 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:51,834 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:51,834 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:51,878 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:45:51,878 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:45:51,898 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:45:51,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 23:45:51,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 23:45:51,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 23:45:51,900 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-10-21 23:45:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:53,704 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-10-21 23:45:53,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-21 23:45:53,705 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 23:45:53,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:53,706 INFO L225 Difference]: With dead ends: 184 [2020-10-21 23:45:53,706 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:45:53,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-10-21 23:45:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:45:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-10-21 23:45:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-21 23:45:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-10-21 23:45:53,709 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-10-21 23:45:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:53,709 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-10-21 23:45:53,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 23:45:53,710 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-10-21 23:45:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 23:45:53,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:53,710 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:53,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:53,914 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:53,914 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-10-21 23:45:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282091691] [2020-10-21 23:45:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:54,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282091691] [2020-10-21 23:45:54,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405651672] [2020-10-21 23:45:54,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:54,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:45:54,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:54,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 23:45:54,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:54,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:45:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:54,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:54,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 23:45:54,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147197716] [2020-10-21 23:45:54,910 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:54,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:54,940 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-10-21 23:45:54,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:54,965 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:45:54,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-21 23:45:54,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:54,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-21 23:45:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-10-21 23:45:54,966 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-10-21 23:45:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:45:58,529 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-10-21 23:45:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 23:45:58,530 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-10-21 23:45:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:45:58,531 INFO L225 Difference]: With dead ends: 224 [2020-10-21 23:45:58,531 INFO L226 Difference]: Without dead ends: 219 [2020-10-21 23:45:58,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-10-21 23:45:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-21 23:45:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-10-21 23:45:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-21 23:45:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-10-21 23:45:58,533 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-10-21 23:45:58,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:45:58,534 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-10-21 23:45:58,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-21 23:45:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-10-21 23:45:58,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-21 23:45:58,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:45:58,534 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:45:58,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-21 23:45:58,735 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:45:58,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:45:58,735 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-10-21 23:45:58,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:45:58,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108728770] [2020-10-21 23:45:58,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:45:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:45:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108728770] [2020-10-21 23:45:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599518778] [2020-10-21 23:45:59,550 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:45:59,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-10-21 23:45:59,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:45:59,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-10-21 23:45:59,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:45:59,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:45:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:45:59,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:45:59,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-10-21 23:45:59,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [309819061] [2020-10-21 23:45:59,719 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:45:59,724 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:45:59,748 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-10-21 23:45:59,748 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:45:59,873 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-10-21 23:45:59,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 23:45:59,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:45:59,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 23:45:59,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 23:45:59,874 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-10-21 23:46:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:03,632 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-21 23:46:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-21 23:46:03,633 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-10-21 23:46:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:03,634 INFO L225 Difference]: With dead ends: 232 [2020-10-21 23:46:03,634 INFO L226 Difference]: Without dead ends: 223 [2020-10-21 23:46:03,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-10-21 23:46:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-21 23:46:03,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-10-21 23:46:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-21 23:46:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-10-21 23:46:03,638 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-10-21 23:46:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:03,638 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-10-21 23:46:03,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 23:46:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-10-21 23:46:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 23:46:03,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:03,639 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:03,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:03,840 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:03,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:03,840 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-10-21 23:46:03,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:03,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964137162] [2020-10-21 23:46:03,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:04,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964137162] [2020-10-21 23:46:04,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221901713] [2020-10-21 23:46:04,727 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:04,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:46:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:04,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 23:46:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:04,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:46:04,891 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:04,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:04,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 23:46:04,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323507230] [2020-10-21 23:46:04,892 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:04,895 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:04,913 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-10-21 23:46:04,913 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:04,976 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:46:04,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 23:46:04,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:04,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 23:46:04,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:46:04,977 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-10-21 23:46:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:08,877 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-10-21 23:46:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 23:46:08,878 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-10-21 23:46:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:08,879 INFO L225 Difference]: With dead ends: 232 [2020-10-21 23:46:08,879 INFO L226 Difference]: Without dead ends: 223 [2020-10-21 23:46:08,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-10-21 23:46:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-21 23:46:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-10-21 23:46:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 23:46:08,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 23:46:08,883 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-10-21 23:46:08,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:08,883 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 23:46:08,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 23:46:08,884 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 23:46:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-21 23:46:08,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:08,884 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:09,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-21 23:46:09,095 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:09,095 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-10-21 23:46:09,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:09,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668097923] [2020-10-21 23:46:09,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:10,089 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:10,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668097923] [2020-10-21 23:46:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131033250] [2020-10-21 23:46:10,090 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:10,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-10-21 23:46:10,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-21 23:46:10,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:10,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:46:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:10,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:10,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-10-21 23:46:10,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1417987235] [2020-10-21 23:46:10,308 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:10,318 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:10,422 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-10-21 23:46:10,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:10,511 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:46:10,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-21 23:46:10,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:10,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-21 23:46:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-21 23:46:10,512 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-10-21 23:46:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:14,455 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-10-21 23:46:14,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-21 23:46:14,456 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-10-21 23:46:14,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:14,457 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:46:14,457 INFO L226 Difference]: Without dead ends: 187 [2020-10-21 23:46:14,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-10-21 23:46:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-21 23:46:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-10-21 23:46:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-21 23:46:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-10-21 23:46:14,461 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-10-21 23:46:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:14,461 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-10-21 23:46:14,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-21 23:46:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-10-21 23:46:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 23:46:14,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:14,462 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:14,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:14,664 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-10-21 23:46:14,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:14,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98990738] [2020-10-21 23:46:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98990738] [2020-10-21 23:46:15,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657208922] [2020-10-21 23:46:15,860 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:15,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-10-21 23:46:15,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:15,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 23:46:15,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:15,958 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:46:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:15,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:15,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-10-21 23:46:15,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270097420] [2020-10-21 23:46:15,972 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:15,975 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:15,994 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-10-21 23:46:15,995 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:15,998 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:46:15,998 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:46:16,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:46:16,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:46:16,138 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (< ~i~0 46))] [2020-10-21 23:46:16,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 23:46:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 23:46:16,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:46:16,139 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-10-21 23:46:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:18,084 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-10-21 23:46:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-21 23:46:18,085 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 23:46:18,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:18,086 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:46:18,086 INFO L226 Difference]: Without dead ends: 186 [2020-10-21 23:46:18,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-10-21 23:46:18,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-21 23:46:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-10-21 23:46:18,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-21 23:46:18,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-10-21 23:46:18,089 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-10-21 23:46:18,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:18,090 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-10-21 23:46:18,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 23:46:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-10-21 23:46:18,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 23:46:18,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:18,091 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:18,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:18,293 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-10-21 23:46:18,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:18,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295194336] [2020-10-21 23:46:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295194336] [2020-10-21 23:46:19,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261419868] [2020-10-21 23:46:19,230 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:19,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-21 23:46:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:19,350 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:46:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:19,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:19,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 23:46:19,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1799490248] [2020-10-21 23:46:19,397 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:19,400 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:19,441 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-10-21 23:46:19,441 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:19,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:46:19,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-21 23:46:19,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:19,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-21 23:46:19,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-10-21 23:46:19,462 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. [2020-10-21 23:46:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:23,488 INFO L93 Difference]: Finished difference Result 234 states and 559 transitions. [2020-10-21 23:46:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 23:46:23,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2020-10-21 23:46:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:23,490 INFO L225 Difference]: With dead ends: 234 [2020-10-21 23:46:23,491 INFO L226 Difference]: Without dead ends: 229 [2020-10-21 23:46:23,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4244 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4436, Invalid=9844, Unknown=0, NotChecked=0, Total=14280 [2020-10-21 23:46:23,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-21 23:46:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 110. [2020-10-21 23:46:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-21 23:46:23,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 269 transitions. [2020-10-21 23:46:23,494 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 269 transitions. Word has length 46 [2020-10-21 23:46:23,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:23,494 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 269 transitions. [2020-10-21 23:46:23,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-21 23:46:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 269 transitions. [2020-10-21 23:46:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-21 23:46:23,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:23,495 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:23,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:23,696 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1747282856, now seen corresponding path program 92 times [2020-10-21 23:46:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:23,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896815884] [2020-10-21 23:46:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896815884] [2020-10-21 23:46:24,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178160539] [2020-10-21 23:46:24,671 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:24,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:46:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:24,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 23:46:24,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:24,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:24,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-10-21 23:46:24,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498600390] [2020-10-21 23:46:24,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:24,852 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:24,870 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 60 transitions. [2020-10-21 23:46:24,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:24,972 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45015#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 43))] [2020-10-21 23:46:24,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 23:46:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 23:46:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1461, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 23:46:24,974 INFO L87 Difference]: Start difference. First operand 110 states and 269 transitions. Second operand 43 states. [2020-10-21 23:46:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:29,239 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-21 23:46:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-21 23:46:29,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-10-21 23:46:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:29,241 INFO L225 Difference]: With dead ends: 242 [2020-10-21 23:46:29,241 INFO L226 Difference]: Without dead ends: 233 [2020-10-21 23:46:29,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4285, Invalid=9757, Unknown=0, NotChecked=0, Total=14042 [2020-10-21 23:46:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-21 23:46:29,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 150. [2020-10-21 23:46:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-21 23:46:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 389 transitions. [2020-10-21 23:46:29,245 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 389 transitions. Word has length 46 [2020-10-21 23:46:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:29,246 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 389 transitions. [2020-10-21 23:46:29,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 23:46:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 389 transitions. [2020-10-21 23:46:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 23:46:29,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:29,246 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:29,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:29,447 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:29,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 2008401321, now seen corresponding path program 93 times [2020-10-21 23:46:29,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:29,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25129152] [2020-10-21 23:46:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:30,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25129152] [2020-10-21 23:46:30,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913801035] [2020-10-21 23:46:30,466 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:30,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-10-21 23:46:30,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:30,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 23:46:30,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:30,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:46:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:30,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:30,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 23:46:30,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [162858192] [2020-10-21 23:46:30,656 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:30,660 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:30,679 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 57 transitions. [2020-10-21 23:46:30,679 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:30,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [45890#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-10-21 23:46:30,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-21 23:46:30,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:30,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-21 23:46:30,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2020-10-21 23:46:30,753 INFO L87 Difference]: Start difference. First operand 150 states and 389 transitions. Second operand 44 states. [2020-10-21 23:46:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:35,159 INFO L93 Difference]: Finished difference Result 242 states and 577 transitions. [2020-10-21 23:46:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-21 23:46:35,160 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 47 [2020-10-21 23:46:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:35,161 INFO L225 Difference]: With dead ends: 242 [2020-10-21 23:46:35,161 INFO L226 Difference]: Without dead ends: 233 [2020-10-21 23:46:35,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4504 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4702, Invalid=10550, Unknown=0, NotChecked=0, Total=15252 [2020-10-21 23:46:35,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-21 23:46:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 109. [2020-10-21 23:46:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-21 23:46:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 267 transitions. [2020-10-21 23:46:35,165 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 267 transitions. Word has length 47 [2020-10-21 23:46:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:35,165 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 267 transitions. [2020-10-21 23:46:35,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-21 23:46:35,166 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 267 transitions. [2020-10-21 23:46:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-21 23:46:35,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:35,166 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:35,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2020-10-21 23:46:35,391 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1668834410, now seen corresponding path program 94 times [2020-10-21 23:46:35,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:35,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283931286] [2020-10-21 23:46:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:46:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:36,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283931286] [2020-10-21 23:46:36,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779291844] [2020-10-21 23:46:36,417 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:36,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:46:36,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:46:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2020-10-21 23:46:36,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:46:36,538 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:46:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:46:36,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:46:36,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-10-21 23:46:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1638927568] [2020-10-21 23:46:36,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:46:36,594 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:46:36,613 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 59 transitions. [2020-10-21 23:46:36,614 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:46:36,670 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:46:36,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-21 23:46:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:46:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-21 23:46:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1442, Unknown=0, NotChecked=0, Total=1892 [2020-10-21 23:46:36,672 INFO L87 Difference]: Start difference. First operand 109 states and 267 transitions. Second operand 43 states. [2020-10-21 23:46:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:46:41,164 INFO L93 Difference]: Finished difference Result 200 states and 493 transitions. [2020-10-21 23:46:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-21 23:46:41,165 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2020-10-21 23:46:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:46:41,167 INFO L225 Difference]: With dead ends: 200 [2020-10-21 23:46:41,167 INFO L226 Difference]: Without dead ends: 195 [2020-10-21 23:46:41,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4464, Invalid=10056, Unknown=0, NotChecked=0, Total=14520 [2020-10-21 23:46:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-21 23:46:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 151. [2020-10-21 23:46:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-21 23:46:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 393 transitions. [2020-10-21 23:46:41,171 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 393 transitions. Word has length 47 [2020-10-21 23:46:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:46:41,171 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 393 transitions. [2020-10-21 23:46:41,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-21 23:46:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 393 transitions. [2020-10-21 23:46:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-21 23:46:41,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:46:41,172 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:46:41,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:46:41,382 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:46:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:46:41,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1782137625, now seen corresponding path program 95 times [2020-10-21 23:46:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:46:41,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553078620] [2020-10-21 23:46:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:46:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-21 23:46:41,401 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-21 23:46:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-21 23:46:41,421 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-21 23:46:41,469 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-21 23:46:41,469 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-21 23:46:41,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-10-21 23:46:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 11:46:41 BasicIcfg [2020-10-21 23:46:41,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 23:46:41,587 INFO L168 Benchmark]: Toolchain (without parser) took 218282.06 ms. Allocated memory was 140.5 MB in the beginning and 442.5 MB in the end (delta: 302.0 MB). Free memory was 102.7 MB in the beginning and 180.8 MB in the end (delta: -78.1 MB). Peak memory consumption was 223.9 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,587 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.02 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 101.6 MB in the beginning and 161.1 MB in the end (delta: -59.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,588 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 205.0 MB. Free memory was 161.1 MB in the beginning and 158.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,588 INFO L168 Benchmark]: Boogie Preprocessor took 31.49 ms. Allocated memory is still 205.0 MB. Free memory was 158.4 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,588 INFO L168 Benchmark]: RCFGBuilder took 419.01 ms. Allocated memory is still 205.0 MB. Free memory was 157.0 MB in the beginning and 135.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,589 INFO L168 Benchmark]: TraceAbstraction took 217039.89 ms. Allocated memory was 205.0 MB in the beginning and 442.5 MB in the end (delta: 237.5 MB). Free memory was 134.5 MB in the beginning and 180.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 191.2 MB. Max. memory is 7.1 GB. [2020-10-21 23:46:41,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 729.02 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 101.6 MB in the beginning and 161.1 MB in the end (delta: -59.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 48.29 ms. Allocated memory is still 205.0 MB. Free memory was 161.1 MB in the beginning and 158.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.49 ms. Allocated memory is still 205.0 MB. Free memory was 158.4 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.01 ms. Allocated memory is still 205.0 MB. Free memory was 157.0 MB in the beginning and 135.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 217039.89 ms. Allocated memory was 205.0 MB in the beginning and 442.5 MB in the end (delta: 237.5 MB). Free memory was 134.5 MB in the beginning and 180.8 MB in the end (delta: -46.3 MB). Peak memory consumption was 191.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 638 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.9s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - CounterExampleResult [Line: 685]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L686] 0 int i = 3, j = 6; [L704] 0 pthread_t id1, id2; [L705] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L706] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L708] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L696] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L688] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=12, k=11] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=14, k=13] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L688] COND TRUE 1 k < 20 [L690] 1 i = j + 1 [L688] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=20, k=19] [L696] COND TRUE 2 k < 20 [L698] 2 j = i + 1 [L696] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L711] 0 int condJ = j >= (2*20 +6); [L713] COND TRUE 0 condI || condJ [L685] COND FALSE 0 !(0) [L685] 0 __assert_fail ("0", "triangular-longest-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 216.7s, OverallIterations: 97, TraceHistogramMax: 20, AutomataDifference: 140.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 1361 SDtfs, 8658 SDslu, 11140 SDs, 0 SdLazy, 12806 SolverSat, 10091 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8788 GetRequests, 2922 SyntacticMatches, 75 SemanticMatches, 5791 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124666 ImplicationChecksByTransitivity, 152.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 96 MinimizatonAttempts, 4319 StatesRemovedByMinimization, 95 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 39.7s InterpolantComputationTime, 5418 NumberOfCodeBlocks, 5418 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 5182 ConstructedInterpolants, 0 QuantifiedInterpolants, 661968 SizeOfPredicates, 1950 NumberOfNonLiveVariables, 16836 ConjunctsInSsa, 2328 ConjunctsInUnsatCore, 188 InterpolantComputations, 4 PerfectInterpolantSequences, 0/23560 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...