/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.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-15 01:04:27,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-15 01:04:27,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-15 01:04:27,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-15 01:04:27,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-15 01:04:27,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-15 01:04:27,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-15 01:04:27,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-15 01:04:27,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-15 01:04:27,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-15 01:04:27,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-15 01:04:27,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-15 01:04:27,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-15 01:04:27,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-15 01:04:27,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-15 01:04:27,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-15 01:04:27,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-15 01:04:27,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-15 01:04:27,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-15 01:04:27,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-15 01:04:27,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-15 01:04:27,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-15 01:04:27,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-15 01:04:27,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-15 01:04:27,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-15 01:04:27,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-15 01:04:27,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-15 01:04:27,153 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-15 01:04:27,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-15 01:04:27,155 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-15 01:04:27,155 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-15 01:04:27,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-15 01:04:27,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-15 01:04:27,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-15 01:04:27,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-15 01:04:27,159 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-15 01:04:27,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-15 01:04:27,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-15 01:04:27,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-15 01:04:27,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-15 01:04:27,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-15 01:04:27,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-15 01:04:27,192 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-15 01:04:27,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-15 01:04:27,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-15 01:04:27,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-15 01:04:27,194 INFO L138 SettingsManager]: * Use SBE=true [2020-09-15 01:04:27,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-15 01:04:27,195 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-15 01:04:27,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-15 01:04:27,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-15 01:04:27,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-15 01:04:27,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-15 01:04:27,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-15 01:04:27,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-15 01:04:27,196 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-15 01:04:27,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-15 01:04:27,197 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-15 01:04:27,197 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-15 01:04:27,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-15 01:04:27,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-15 01:04:27,198 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-15 01:04:27,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-15 01:04:27,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:04:27,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-15 01:04:27,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-15 01:04:27,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-15 01:04:27,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-15 01:04:27,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-15 01:04:27,199 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-15 01:04:27,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-15 01:04:28,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-15 01:04:28,435 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-15 01:04:28,439 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-15 01:04:28,441 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-15 01:04:28,442 INFO L275 PluginConnector]: CDTParser initialized [2020-09-15 01:04:28,443 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-15 01:04:28,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09bd6450a/828daf80ff1e4e2d8d1c6f70bc4c28c1/FLAGeb98851c8 [2020-09-15 01:04:29,207 INFO L306 CDTParser]: Found 1 translation units. [2020-09-15 01:04:29,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-15 01:04:29,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09bd6450a/828daf80ff1e4e2d8d1c6f70bc4c28c1/FLAGeb98851c8 [2020-09-15 01:04:29,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09bd6450a/828daf80ff1e4e2d8d1c6f70bc4c28c1 [2020-09-15 01:04:29,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-15 01:04:29,524 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-15 01:04:29,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-15 01:04:29,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-15 01:04:29,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-15 01:04:29,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:04:29" (1/1) ... [2020-09-15 01:04:29,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@762f226f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:29, skipping insertion in model container [2020-09-15 01:04:29,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 01:04:29" (1/1) ... [2020-09-15 01:04:29,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-15 01:04:29,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-15 01:04:30,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:04:30,140 INFO L203 MainTranslator]: Completed pre-run [2020-09-15 01:04:30,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-15 01:04:30,282 INFO L208 MainTranslator]: Completed translation [2020-09-15 01:04:30,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30 WrapperNode [2020-09-15 01:04:30,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-15 01:04:30,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-15 01:04:30,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-15 01:04:30,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-15 01:04:30,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,355 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-15 01:04:30,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-15 01:04:30,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-15 01:04:30,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-15 01:04:30,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... [2020-09-15 01:04:30,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-15 01:04:30,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-15 01:04:30,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-15 01:04:30,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-15 01:04:30,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-15 01:04:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-15 01:04:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-15 01:04:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-15 01:04:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-15 01:04:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-15 01:04:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-15 01:04:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-15 01:04:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-15 01:04:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-15 01:04:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-15 01:04:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-15 01:04:30,487 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-15 01:04:30,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-15 01:04:30,891 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-15 01:04:30,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:04:30 BoogieIcfgContainer [2020-09-15 01:04:30,896 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-15 01:04:30,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-15 01:04:30,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-15 01:04:30,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-15 01:04:30,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 01:04:29" (1/3) ... [2020-09-15 01:04:30,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ef878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:04:30, skipping insertion in model container [2020-09-15 01:04:30,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 01:04:30" (2/3) ... [2020-09-15 01:04:30,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44ef878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 01:04:30, skipping insertion in model container [2020-09-15 01:04:30,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 01:04:30" (3/3) ... [2020-09-15 01:04:30,907 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-15 01:04:30,919 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-15 01:04:30,919 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-15 01:04:30,929 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-15 01:04:30,930 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-15 01:04:30,959 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,959 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,960 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,960 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,960 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,960 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,961 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,961 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,962 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,962 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,962 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,963 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,963 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,964 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,964 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,964 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,964 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,965 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,965 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,965 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,965 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,966 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,966 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,967 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,967 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,968 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,972 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,973 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,973 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,973 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,985 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,985 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:30,986 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-15 01:04:31,014 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-15 01:04:31,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-15 01:04:31,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-15 01:04:31,038 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-15 01:04:31,038 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-15 01:04:31,038 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-15 01:04:31,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-15 01:04:31,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-15 01:04:31,039 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-15 01:04:31,056 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:31,058 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:31,100 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-15 01:04:31,100 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:04:31,107 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-15 01:04:31,111 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-15 01:04:31,138 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-15 01:04:31,140 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-15 01:04:31,141 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-09-15 01:04:31,144 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-15 01:04:31,146 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-15 01:04:32,324 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-15 01:04:32,426 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-15 01:04:32,426 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-15 01:04:32,432 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-15 01:04:32,446 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-15 01:04:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-15 01:04:32,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-15 01:04:32,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:32,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-15 01:04:32,471 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:32,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-15 01:04:32,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:32,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421192342] [2020-09-15 01:04:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:32,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421192342] [2020-09-15 01:04:32,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:32,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-15 01:04:32,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489930234] [2020-09-15 01:04:32,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-15 01:04:32,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-15 01:04:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-15 01:04:32,805 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-15 01:04:32,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:32,878 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-15 01:04:32,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:04:32,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-15 01:04:32,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:32,898 INFO L225 Difference]: With dead ends: 83 [2020-09-15 01:04:32,898 INFO L226 Difference]: Without dead ends: 54 [2020-09-15 01:04:32,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:32,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-15 01:04:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-15 01:04:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-15 01:04:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-15 01:04:32,948 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-15 01:04:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:32,949 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-15 01:04:32,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-15 01:04:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-15 01:04:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:32,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:32,950 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:32,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-15 01:04:32,951 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-15 01:04:32,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:32,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715758867] [2020-09-15 01:04:32,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715758867] [2020-09-15 01:04:33,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:33,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:33,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451275831] [2020-09-15 01:04:33,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:33,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,128 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-15 01:04:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,202 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-15 01:04:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:33,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,204 INFO L225 Difference]: With dead ends: 80 [2020-09-15 01:04:33,205 INFO L226 Difference]: Without dead ends: 75 [2020-09-15 01:04:33,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:33,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-15 01:04:33,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-15 01:04:33,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-15 01:04:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-15 01:04:33,217 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-15 01:04:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,218 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-15 01:04:33,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-15 01:04:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:33,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-15 01:04:33,220 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-15 01:04:33,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60886836] [2020-09-15 01:04:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60886836] [2020-09-15 01:04:33,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:33,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:33,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185651279] [2020-09-15 01:04:33,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:33,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:33,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,327 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-15 01:04:33,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,360 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-15 01:04:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-15 01:04:33,361 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:33,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,363 INFO L225 Difference]: With dead ends: 73 [2020-09-15 01:04:33,363 INFO L226 Difference]: Without dead ends: 70 [2020-09-15 01:04:33,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-15 01:04:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-15 01:04:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-15 01:04:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-15 01:04:33,374 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-15 01:04:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,374 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-15 01:04:33,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:33,375 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-15 01:04:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-15 01:04:33,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-15 01:04:33,377 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-15 01:04:33,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928178995] [2020-09-15 01:04:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928178995] [2020-09-15 01:04:33,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:33,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-15 01:04:33,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707073987] [2020-09-15 01:04:33,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-15 01:04:33,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-15 01:04:33,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-15 01:04:33,483 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-15 01:04:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:33,558 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-15 01:04:33,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:33,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-15 01:04:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:33,560 INFO L225 Difference]: With dead ends: 86 [2020-09-15 01:04:33,562 INFO L226 Difference]: Without dead ends: 80 [2020-09-15 01:04:33,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-15 01:04:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-15 01:04:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-15 01:04:33,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-15 01:04:33,579 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-15 01:04:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:33,580 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-15 01:04:33,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-15 01:04:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-15 01:04:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:33,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:33,584 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:33,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-15 01:04:33,584 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:33,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:33,584 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-15 01:04:33,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:33,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376635783] [2020-09-15 01:04:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376635783] [2020-09-15 01:04:33,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799421949] [2020-09-15 01:04:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:33,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:33,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:33,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:33,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:33,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:33,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:33,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-15 01:04:33,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391463941] [2020-09-15 01:04:33,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-15 01:04:33,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-15 01:04:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:33,959 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-15 01:04:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:34,064 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-15 01:04:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:34,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-15 01:04:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:34,066 INFO L225 Difference]: With dead ends: 101 [2020-09-15 01:04:34,067 INFO L226 Difference]: Without dead ends: 96 [2020-09-15 01:04:34,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-15 01:04:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-15 01:04:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-15 01:04:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-15 01:04:34,078 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-15 01:04:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:34,078 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-15 01:04:34,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-15 01:04:34,080 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-15 01:04:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:34,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:34,081 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:34,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,285 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-15 01:04:34,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:34,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057528934] [2020-09-15 01:04:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:34,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057528934] [2020-09-15 01:04:34,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519451787] [2020-09-15 01:04:34,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:34,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:34,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344353786] [2020-09-15 01:04:34,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:34,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:34,559 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-15 01:04:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:34,616 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-15 01:04:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:34,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:34,618 INFO L225 Difference]: With dead ends: 88 [2020-09-15 01:04:34,618 INFO L226 Difference]: Without dead ends: 85 [2020-09-15 01:04:34,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-15 01:04:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-09-15 01:04:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-15 01:04:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 183 transitions. [2020-09-15 01:04:34,626 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 183 transitions. Word has length 9 [2020-09-15 01:04:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:34,626 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 183 transitions. [2020-09-15 01:04:34,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 183 transitions. [2020-09-15 01:04:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:34,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:34,628 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:34,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,842 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-15 01:04:34,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:34,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273205639] [2020-09-15 01:04:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:34,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273205639] [2020-09-15 01:04:34,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912018582] [2020-09-15 01:04:34,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:34,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:34,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:34,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:35,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:35,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285556194] [2020-09-15 01:04:35,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:35,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:35,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:35,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:35,065 INFO L87 Difference]: Start difference. First operand 76 states and 183 transitions. Second operand 9 states. [2020-09-15 01:04:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:35,175 INFO L93 Difference]: Finished difference Result 94 states and 221 transitions. [2020-09-15 01:04:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:35,176 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:35,177 INFO L225 Difference]: With dead ends: 94 [2020-09-15 01:04:35,177 INFO L226 Difference]: Without dead ends: 91 [2020-09-15 01:04:35,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-15 01:04:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-09-15 01:04:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-15 01:04:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-09-15 01:04:35,185 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 9 [2020-09-15 01:04:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:35,186 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-09-15 01:04:35,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-09-15 01:04:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-15 01:04:35,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:35,187 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:35,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:35,401 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:35,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-15 01:04:35,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:35,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112929131] [2020-09-15 01:04:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112929131] [2020-09-15 01:04:35,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650899236] [2020-09-15 01:04:35,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:35,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:35,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:35,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-15 01:04:35,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:35,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:35,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:35,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-15 01:04:35,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10517512] [2020-09-15 01:04:35,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-15 01:04:35,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-15 01:04:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:35,595 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 9 states. [2020-09-15 01:04:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:35,747 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-15 01:04:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:35,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-15 01:04:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:35,751 INFO L225 Difference]: With dead ends: 103 [2020-09-15 01:04:35,751 INFO L226 Difference]: Without dead ends: 97 [2020-09-15 01:04:35,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-15 01:04:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2020-09-15 01:04:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-15 01:04:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-15 01:04:35,769 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-09-15 01:04:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:35,769 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-15 01:04:35,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-15 01:04:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-15 01:04:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:35,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:35,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:35,988 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:35,988 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 1 times [2020-09-15 01:04:35,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:35,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403270127] [2020-09-15 01:04:35,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403270127] [2020-09-15 01:04:36,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:36,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:36,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875338439] [2020-09-15 01:04:36,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:36,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:36,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:36,080 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-15 01:04:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,126 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-15 01:04:36,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:36,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,129 INFO L225 Difference]: With dead ends: 100 [2020-09-15 01:04:36,129 INFO L226 Difference]: Without dead ends: 98 [2020-09-15 01:04:36,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-15 01:04:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-15 01:04:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-15 01:04:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-15 01:04:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-15 01:04:36,136 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-15 01:04:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,136 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-15 01:04:36,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:36,136 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-15 01:04:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:36,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-15 01:04:36,138 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:36,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:36,138 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 2 times [2020-09-15 01:04:36,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:36,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930628727] [2020-09-15 01:04:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930628727] [2020-09-15 01:04:36,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:36,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:36,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266014700] [2020-09-15 01:04:36,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:36,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:36,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:36,213 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-15 01:04:36,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,301 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-15 01:04:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:36,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,304 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:04:36,304 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:04:36,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-15 01:04:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:04:36,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-15 01:04:36,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:04:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-15 01:04:36,320 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-15 01:04:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,321 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-15 01:04:36,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-15 01:04:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:36,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-15 01:04:36,325 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 3 times [2020-09-15 01:04:36,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:36,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616164029] [2020-09-15 01:04:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616164029] [2020-09-15 01:04:36,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-15 01:04:36,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-15 01:04:36,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569144830] [2020-09-15 01:04:36,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-15 01:04:36,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-15 01:04:36,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-15 01:04:36,434 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-15 01:04:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,548 INFO L93 Difference]: Finished difference Result 105 states and 248 transitions. [2020-09-15 01:04:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:36,548 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-15 01:04:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,549 INFO L225 Difference]: With dead ends: 105 [2020-09-15 01:04:36,550 INFO L226 Difference]: Without dead ends: 100 [2020-09-15 01:04:36,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-09-15 01:04:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-15 01:04:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-15 01:04:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-15 01:04:36,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-15 01:04:36,556 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-15 01:04:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,556 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-15 01:04:36,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-15 01:04:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-15 01:04:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,557 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:36,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-15 01:04:36,558 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:36,558 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-15 01:04:36,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:36,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582812109] [2020-09-15 01:04:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582812109] [2020-09-15 01:04:36,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492088731] [2020-09-15 01:04:36,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:36,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:36,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:36,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:36,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:36,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:36,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-15 01:04:36,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063181485] [2020-09-15 01:04:36,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-15 01:04:36,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:36,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-15 01:04:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:36,784 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-15 01:04:36,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:36,881 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-15 01:04:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:36,882 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-15 01:04:36,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:36,883 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:04:36,883 INFO L226 Difference]: Without dead ends: 117 [2020-09-15 01:04:36,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-15 01:04:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-15 01:04:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-15 01:04:36,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-15 01:04:36,889 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-15 01:04:36,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:36,889 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-15 01:04:36,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-15 01:04:36,889 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-15 01:04:36,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:36,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:36,890 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:37,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-09-15 01:04:37,099 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:37,100 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-15 01:04:37,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:37,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499427347] [2020-09-15 01:04:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499427347] [2020-09-15 01:04:37,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662470052] [2020-09-15 01:04:37,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:37,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:37,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:37,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:37,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760332962] [2020-09-15 01:04:37,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:37,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:37,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:37,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:37,330 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-15 01:04:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:37,423 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-15 01:04:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:37,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:37,425 INFO L225 Difference]: With dead ends: 108 [2020-09-15 01:04:37,425 INFO L226 Difference]: Without dead ends: 105 [2020-09-15 01:04:37,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-15 01:04:37,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-15 01:04:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-15 01:04:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-15 01:04:37,431 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-15 01:04:37,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:37,432 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-15 01:04:37,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-15 01:04:37,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:37,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:37,433 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:37,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:37,645 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-15 01:04:37,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:37,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430412498] [2020-09-15 01:04:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430412498] [2020-09-15 01:04:37,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304598803] [2020-09-15 01:04:37,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:37,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:37,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:37,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:37,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108885872] [2020-09-15 01:04:37,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:37,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:37,922 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-15 01:04:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:38,056 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-15 01:04:38,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:38,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:38,061 INFO L225 Difference]: With dead ends: 116 [2020-09-15 01:04:38,062 INFO L226 Difference]: Without dead ends: 113 [2020-09-15 01:04:38,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-15 01:04:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-15 01:04:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-15 01:04:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-15 01:04:38,073 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-15 01:04:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:38,073 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-15 01:04:38,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:38,074 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-15 01:04:38,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:38,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:38,077 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:38,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-09-15 01:04:38,293 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:38,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-15 01:04:38,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:38,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044584554] [2020-09-15 01:04:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044584554] [2020-09-15 01:04:38,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368751404] [2020-09-15 01:04:38,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:38,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:38,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:38,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:38,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:38,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874130150] [2020-09-15 01:04:38,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:38,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:38,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:38,544 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-15 01:04:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:38,689 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-15 01:04:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:38,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:38,691 INFO L225 Difference]: With dead ends: 115 [2020-09-15 01:04:38,691 INFO L226 Difference]: Without dead ends: 112 [2020-09-15 01:04:38,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:38,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-15 01:04:38,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-15 01:04:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:04:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-15 01:04:38,696 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-15 01:04:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:38,697 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-15 01:04:38,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-15 01:04:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-15 01:04:38,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:38,698 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:38,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-15 01:04:38,909 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:38,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:38,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-15 01:04:38,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:38,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275116381] [2020-09-15 01:04:38,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:38,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275116381] [2020-09-15 01:04:38,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399852890] [2020-09-15 01:04:38,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:39,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:39,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:39,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:39,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:39,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:39,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:39,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675176343] [2020-09-15 01:04:39,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:39,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:39,129 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-15 01:04:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:39,370 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-15 01:04:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:39,371 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-15 01:04:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:39,372 INFO L225 Difference]: With dead ends: 124 [2020-09-15 01:04:39,372 INFO L226 Difference]: Without dead ends: 118 [2020-09-15 01:04:39,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-15 01:04:39,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-15 01:04:39,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-15 01:04:39,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-15 01:04:39,379 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-15 01:04:39,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:39,379 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-15 01:04:39,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-15 01:04:39,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:39,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:39,380 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:39,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-15 01:04:39,587 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 4 times [2020-09-15 01:04:39,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:39,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350244498] [2020-09-15 01:04:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350244498] [2020-09-15 01:04:39,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011032566] [2020-09-15 01:04:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:39,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:39,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:39,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:39,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:39,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:39,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:39,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467462648] [2020-09-15 01:04:39,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:39,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:39,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:39,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:39,804 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-15 01:04:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:39,849 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-15 01:04:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-15 01:04:39,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:39,851 INFO L225 Difference]: With dead ends: 113 [2020-09-15 01:04:39,851 INFO L226 Difference]: Without dead ends: 111 [2020-09-15 01:04:39,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-15 01:04:39,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-15 01:04:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-15 01:04:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-15 01:04:39,856 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-15 01:04:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:39,856 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-15 01:04:39,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-15 01:04:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:39,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:39,857 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:40,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-15 01:04:40,071 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:40,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:40,072 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 5 times [2020-09-15 01:04:40,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:40,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603112077] [2020-09-15 01:04:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603112077] [2020-09-15 01:04:40,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97940844] [2020-09-15 01:04:40,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:40,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:40,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:40,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:40,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:40,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049075361] [2020-09-15 01:04:40,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:40,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:40,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:40,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:40,259 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-15 01:04:40,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:40,325 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-15 01:04:40,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:40,326 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:40,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:40,327 INFO L225 Difference]: With dead ends: 118 [2020-09-15 01:04:40,327 INFO L226 Difference]: Without dead ends: 116 [2020-09-15 01:04:40,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-15 01:04:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-15 01:04:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-15 01:04:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-15 01:04:40,332 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-15 01:04:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:40,332 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-15 01:04:40,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:40,333 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-15 01:04:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:40,333 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:40,333 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:40,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-15 01:04:40,540 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:40,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:40,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 6 times [2020-09-15 01:04:40,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:40,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009767621] [2020-09-15 01:04:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:40,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009767621] [2020-09-15 01:04:40,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064897467] [2020-09-15 01:04:40,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:40,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:40,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:40,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:40,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:40,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:40,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101227717] [2020-09-15 01:04:40,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:40,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:40,816 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-15 01:04:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:40,940 INFO L93 Difference]: Finished difference Result 117 states and 278 transitions. [2020-09-15 01:04:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:40,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:40,942 INFO L225 Difference]: With dead ends: 117 [2020-09-15 01:04:40,942 INFO L226 Difference]: Without dead ends: 115 [2020-09-15 01:04:40,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-15 01:04:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 98. [2020-09-15 01:04:40,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:04:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-15 01:04:40,947 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-15 01:04:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:40,947 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-15 01:04:40,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-15 01:04:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:40,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:40,948 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:41,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:41,159 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:41,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 7 times [2020-09-15 01:04:41,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:41,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176420279] [2020-09-15 01:04:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176420279] [2020-09-15 01:04:41,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91465799] [2020-09-15 01:04:41,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:41,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:41,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:41,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:41,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739050152] [2020-09-15 01:04:41,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:41,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:41,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:41,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:41,428 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-15 01:04:41,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:41,509 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-15 01:04:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:41,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:41,510 INFO L225 Difference]: With dead ends: 122 [2020-09-15 01:04:41,511 INFO L226 Difference]: Without dead ends: 120 [2020-09-15 01:04:41,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-15 01:04:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-15 01:04:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-15 01:04:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-15 01:04:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-15 01:04:41,515 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-15 01:04:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-15 01:04:41,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-15 01:04:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:41,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:41,516 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:41,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-09-15 01:04:41,717 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:41,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:41,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 8 times [2020-09-15 01:04:41,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:41,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026929686] [2020-09-15 01:04:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026929686] [2020-09-15 01:04:41,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945887137] [2020-09-15 01:04:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:41,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:41,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:41,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:41,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:41,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609836975] [2020-09-15 01:04:41,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:41,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:41,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:41,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:41,954 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:42,049 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-15 01:04:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:42,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:42,052 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:04:42,052 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:04:42,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:04:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-15 01:04:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-15 01:04:42,056 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-15 01:04:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:42,057 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-15 01:04:42,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-15 01:04:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:42,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:42,058 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:42,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:42,262 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 9 times [2020-09-15 01:04:42,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:42,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88164652] [2020-09-15 01:04:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88164652] [2020-09-15 01:04:42,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224644820] [2020-09-15 01:04:42,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:42,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:42,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:42,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:42,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:42,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739485362] [2020-09-15 01:04:42,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:42,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:42,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:42,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:42,535 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-15 01:04:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:42,606 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-15 01:04:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:42,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:42,608 INFO L225 Difference]: With dead ends: 123 [2020-09-15 01:04:42,608 INFO L226 Difference]: Without dead ends: 121 [2020-09-15 01:04:42,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-15 01:04:42,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-15 01:04:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-15 01:04:42,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-15 01:04:42,613 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-15 01:04:42,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:42,614 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-15 01:04:42,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-15 01:04:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:42,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:42,628 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:42,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-15 01:04:42,837 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:42,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:42,837 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 10 times [2020-09-15 01:04:42,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:42,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184030624] [2020-09-15 01:04:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:42,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184030624] [2020-09-15 01:04:42,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355223680] [2020-09-15 01:04:42,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:42,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:42,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:43,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:43,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:43,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:43,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001024876] [2020-09-15 01:04:43,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:43,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:43,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:43,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:43,118 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-15 01:04:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:43,380 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-15 01:04:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:43,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:43,382 INFO L225 Difference]: With dead ends: 133 [2020-09-15 01:04:43,382 INFO L226 Difference]: Without dead ends: 128 [2020-09-15 01:04:43,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-15 01:04:43,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-15 01:04:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-15 01:04:43,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-15 01:04:43,389 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-15 01:04:43,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:43,390 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-15 01:04:43,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:43,390 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-15 01:04:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:43,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:43,394 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:43,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:43,605 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 11 times [2020-09-15 01:04:43,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:43,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107947573] [2020-09-15 01:04:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:43,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:43,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107947573] [2020-09-15 01:04:43,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915721605] [2020-09-15 01:04:43,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:43,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:43,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:43,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:43,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780388155] [2020-09-15 01:04:43,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:43,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:43,865 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:44,017 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-15 01:04:44,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:44,018 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:44,019 INFO L225 Difference]: With dead ends: 127 [2020-09-15 01:04:44,020 INFO L226 Difference]: Without dead ends: 125 [2020-09-15 01:04:44,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-15 01:04:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-15 01:04:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:04:44,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-15 01:04:44,027 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-15 01:04:44,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:44,027 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-15 01:04:44,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:44,028 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-15 01:04:44,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:44,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:44,029 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:44,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-15 01:04:44,243 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:44,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 12 times [2020-09-15 01:04:44,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:44,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053395817] [2020-09-15 01:04:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053395817] [2020-09-15 01:04:44,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250236611] [2020-09-15 01:04:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:44,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:44,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:44,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:44,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:44,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083701152] [2020-09-15 01:04:44,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:44,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:44,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:44,472 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-15 01:04:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:44,761 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-15 01:04:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:04:44,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:44,763 INFO L225 Difference]: With dead ends: 141 [2020-09-15 01:04:44,763 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:04:44,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:04:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:04:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-15 01:04:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-15 01:04:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-15 01:04:44,769 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-15 01:04:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:44,770 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-15 01:04:44,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-15 01:04:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:44,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:44,772 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-15 01:04:44,986 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 13 times [2020-09-15 01:04:44,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:44,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649981953] [2020-09-15 01:04:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649981953] [2020-09-15 01:04:45,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434356532] [2020-09-15 01:04:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:45,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:45,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:45,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:45,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881885940] [2020-09-15 01:04:45,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:45,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:45,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:45,206 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-15 01:04:45,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:45,392 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-15 01:04:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:45,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:45,394 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:45,394 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:45,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:45,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-15 01:04:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:45,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-15 01:04:45,398 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-15 01:04:45,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:45,399 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-15 01:04:45,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-15 01:04:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:45,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:45,400 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:45,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-15 01:04:45,609 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:45,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 14 times [2020-09-15 01:04:45,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:45,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649113210] [2020-09-15 01:04:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649113210] [2020-09-15 01:04:45,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868337523] [2020-09-15 01:04:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:45,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:45,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:45,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:45,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:45,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:45,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:45,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402229941] [2020-09-15 01:04:45,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:45,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:45,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:45,836 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-15 01:04:45,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:45,976 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-09-15 01:04:45,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:45,977 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:45,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:45,978 INFO L225 Difference]: With dead ends: 128 [2020-09-15 01:04:45,978 INFO L226 Difference]: Without dead ends: 126 [2020-09-15 01:04:45,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-15 01:04:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-15 01:04:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:45,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-15 01:04:45,984 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-15 01:04:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:45,984 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-15 01:04:45,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:45,984 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-15 01:04:45,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:45,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:45,985 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:46,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-15 01:04:46,196 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:46,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:46,197 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 15 times [2020-09-15 01:04:46,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:46,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880839987] [2020-09-15 01:04:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880839987] [2020-09-15 01:04:46,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505039888] [2020-09-15 01:04:46,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:46,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:46,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:46,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:46,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235306610] [2020-09-15 01:04:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:46,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:46,412 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-15 01:04:46,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:46,682 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-09-15 01:04:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:04:46,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:46,685 INFO L225 Difference]: With dead ends: 126 [2020-09-15 01:04:46,686 INFO L226 Difference]: Without dead ends: 124 [2020-09-15 01:04:46,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-15 01:04:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2020-09-15 01:04:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-15 01:04:46,690 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-15 01:04:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:46,690 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-15 01:04:46,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-15 01:04:46,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:46,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:46,691 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:46,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-15 01:04:46,901 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 16 times [2020-09-15 01:04:46,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:46,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899704287] [2020-09-15 01:04:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:46,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899704287] [2020-09-15 01:04:46,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016659243] [2020-09-15 01:04:46,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:47,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:47,102 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:47,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:47,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:47,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780211803] [2020-09-15 01:04:47,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:47,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:47,116 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:47,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:47,378 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2020-09-15 01:04:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:04:47,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:47,380 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:47,380 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:47,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:04:47,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:47,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-15 01:04:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-15 01:04:47,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-15 01:04:47,386 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-15 01:04:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:47,386 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-15 01:04:47,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-15 01:04:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:47,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:47,387 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:47,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:47,599 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 17 times [2020-09-15 01:04:47,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:47,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153481672] [2020-09-15 01:04:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:47,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153481672] [2020-09-15 01:04:47,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144315572] [2020-09-15 01:04:47,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:47,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:47,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:47,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:47,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:47,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:47,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417299751] [2020-09-15 01:04:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:47,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:47,790 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-15 01:04:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:48,156 INFO L93 Difference]: Finished difference Result 138 states and 325 transitions. [2020-09-15 01:04:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:04:48,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:48,158 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:04:48,158 INFO L226 Difference]: Without dead ends: 133 [2020-09-15 01:04:48,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:04:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-15 01:04:48,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 99. [2020-09-15 01:04:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-15 01:04:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-15 01:04:48,163 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-15 01:04:48,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:48,164 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-15 01:04:48,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-15 01:04:48,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:48,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:48,165 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:48,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:48,375 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:48,376 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 18 times [2020-09-15 01:04:48,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:48,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559902564] [2020-09-15 01:04:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:48,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559902564] [2020-09-15 01:04:48,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201909701] [2020-09-15 01:04:48,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:48,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:48,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-15 01:04:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:48,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:48,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:48,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-15 01:04:48,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109953194] [2020-09-15 01:04:48,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:04:48,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:04:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:04:48,611 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-15 01:04:48,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:48,905 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-15 01:04:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:04:48,906 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-15 01:04:48,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:48,908 INFO L225 Difference]: With dead ends: 136 [2020-09-15 01:04:48,908 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:48,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:04:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2020-09-15 01:04:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-15 01:04:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-15 01:04:48,914 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-15 01:04:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:48,914 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-15 01:04:48,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:04:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-15 01:04:48,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:48,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:48,915 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:49,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:49,129 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:49,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:49,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-15 01:04:49,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:49,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572674959] [2020-09-15 01:04:49,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:49,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:49,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572674959] [2020-09-15 01:04:49,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139445180] [2020-09-15 01:04:49,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:49,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:49,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:04:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:49,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-15 01:04:49,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618570279] [2020-09-15 01:04:49,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-15 01:04:49,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-15 01:04:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:49,397 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-15 01:04:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:49,543 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-15 01:04:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:49,544 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-15 01:04:49,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:49,545 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:04:49,545 INFO L226 Difference]: Without dead ends: 138 [2020-09-15 01:04:49,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-15 01:04:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-15 01:04:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-15 01:04:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-15 01:04:49,550 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-15 01:04:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:49,550 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-15 01:04:49,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-15 01:04:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-15 01:04:49,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:49,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:49,551 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:49,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-15 01:04:49,762 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:49,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:49,763 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-15 01:04:49,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:49,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874802337] [2020-09-15 01:04:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:49,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874802337] [2020-09-15 01:04:49,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122933207] [2020-09-15 01:04:49,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:49,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:49,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:49,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:50,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:50,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:50,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340549405] [2020-09-15 01:04:50,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:50,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:50,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:50,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:50,036 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-15 01:04:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:50,169 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-15 01:04:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:50,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:50,171 INFO L225 Difference]: With dead ends: 134 [2020-09-15 01:04:50,171 INFO L226 Difference]: Without dead ends: 131 [2020-09-15 01:04:50,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-15 01:04:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-09-15 01:04:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:04:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-15 01:04:50,176 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-15 01:04:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:50,176 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-15 01:04:50,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-15 01:04:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:50,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:50,177 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:50,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:50,387 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-15 01:04:50,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:50,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660839934] [2020-09-15 01:04:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660839934] [2020-09-15 01:04:50,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687646957] [2020-09-15 01:04:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:50,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:04:50,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:50,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:50,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:50,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:50,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:50,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:50,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002197794] [2020-09-15 01:04:50,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:50,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:50,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:50,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:50,659 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-15 01:04:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:50,873 INFO L93 Difference]: Finished difference Result 145 states and 336 transitions. [2020-09-15 01:04:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:50,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:50,877 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:04:50,877 INFO L226 Difference]: Without dead ends: 142 [2020-09-15 01:04:50,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-15 01:04:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-15 01:04:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-15 01:04:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-15 01:04:50,881 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-15 01:04:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:50,882 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-15 01:04:50,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-15 01:04:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:50,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:50,883 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:51,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-15 01:04:51,083 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-15 01:04:51,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:51,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140166552] [2020-09-15 01:04:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:51,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140166552] [2020-09-15 01:04:51,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493257315] [2020-09-15 01:04:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:51,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:04:51,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:51,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:51,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:51,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:51,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127284625] [2020-09-15 01:04:51,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:51,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:51,370 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-15 01:04:51,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:51,609 INFO L93 Difference]: Finished difference Result 147 states and 342 transitions. [2020-09-15 01:04:51,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:04:51,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:51,610 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:04:51,611 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:04:51,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:04:51,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:04:51,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-09-15 01:04:51,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-15 01:04:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-15 01:04:51,615 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-15 01:04:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:51,615 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-15 01:04:51,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-15 01:04:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:51,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:51,616 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:51,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:51,828 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-15 01:04:51,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:51,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311453979] [2020-09-15 01:04:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:51,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311453979] [2020-09-15 01:04:51,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558382388] [2020-09-15 01:04:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:51,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:52,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:52,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806463361] [2020-09-15 01:04:52,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:52,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:52,077 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-15 01:04:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:52,291 INFO L93 Difference]: Finished difference Result 143 states and 336 transitions. [2020-09-15 01:04:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:52,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:52,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:52,293 INFO L225 Difference]: With dead ends: 143 [2020-09-15 01:04:52,293 INFO L226 Difference]: Without dead ends: 140 [2020-09-15 01:04:52,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:04:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-15 01:04:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-09-15 01:04:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 01:04:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-15 01:04:52,298 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-15 01:04:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:52,298 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-15 01:04:52,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-15 01:04:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-15 01:04:52,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:52,299 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:52,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-15 01:04:52,511 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-15 01:04:52,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:52,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228173295] [2020-09-15 01:04:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228173295] [2020-09-15 01:04:52,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106937323] [2020-09-15 01:04:52,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:52,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:52,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:52,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:04:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:52,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:52,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:52,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65480380] [2020-09-15 01:04:52,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:52,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:52,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:52,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:52,721 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-15 01:04:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:53,042 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:04:53,043 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-15 01:04:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:53,045 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:53,045 INFO L226 Difference]: Without dead ends: 144 [2020-09-15 01:04:53,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:04:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-15 01:04:53,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-15 01:04:53,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-15 01:04:53,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-15 01:04:53,050 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-15 01:04:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:53,050 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-15 01:04:53,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-15 01:04:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:53,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:53,051 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:53,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:53,261 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 19 times [2020-09-15 01:04:53,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:53,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799326346] [2020-09-15 01:04:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799326346] [2020-09-15 01:04:53,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037487020] [2020-09-15 01:04:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:53,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:53,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:53,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:53,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003565925] [2020-09-15 01:04:53,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:53,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:53,494 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-15 01:04:53,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:53,547 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-15 01:04:53,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-15 01:04:53,547 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:53,549 INFO L225 Difference]: With dead ends: 138 [2020-09-15 01:04:53,549 INFO L226 Difference]: Without dead ends: 136 [2020-09-15 01:04:53,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-15 01:04:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-15 01:04:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-15 01:04:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-15 01:04:53,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-15 01:04:53,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:53,553 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-15 01:04:53,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:53,553 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-15 01:04:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:53,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:53,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:53,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-15 01:04:53,755 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 20 times [2020-09-15 01:04:53,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:53,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737428648] [2020-09-15 01:04:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:53,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737428648] [2020-09-15 01:04:53,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603884510] [2020-09-15 01:04:53,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:53,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:54,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:54,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656052014] [2020-09-15 01:04:54,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:54,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:54,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:54,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:54,029 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-15 01:04:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:54,123 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-15 01:04:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:54,123 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:54,125 INFO L225 Difference]: With dead ends: 145 [2020-09-15 01:04:54,125 INFO L226 Difference]: Without dead ends: 143 [2020-09-15 01:04:54,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:54,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-15 01:04:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-15 01:04:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-15 01:04:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-15 01:04:54,130 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-15 01:04:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:54,130 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-15 01:04:54,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-15 01:04:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:54,131 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:54,131 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:54,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-15 01:04:54,341 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:54,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:54,342 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 21 times [2020-09-15 01:04:54,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:54,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558246698] [2020-09-15 01:04:54,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558246698] [2020-09-15 01:04:54,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065497002] [2020-09-15 01:04:54,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:54,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:54,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:54,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:54,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423004026] [2020-09-15 01:04:54,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:54,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:54,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:54,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:54,559 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-15 01:04:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:54,703 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:54,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:54,705 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:54,705 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:04:54,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:54,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:04:54,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-15 01:04:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-15 01:04:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-15 01:04:54,708 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-15 01:04:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:54,709 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-15 01:04:54,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-15 01:04:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:54,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:54,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:54,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-15 01:04:54,911 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:54,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:54,912 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 22 times [2020-09-15 01:04:54,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:54,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267176293] [2020-09-15 01:04:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:54,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267176293] [2020-09-15 01:04:54,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749538418] [2020-09-15 01:04:54,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:55,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:55,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:55,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:55,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676640366] [2020-09-15 01:04:55,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:55,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:55,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:55,149 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-15 01:04:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:55,376 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-15 01:04:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:55,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:55,377 INFO L225 Difference]: With dead ends: 150 [2020-09-15 01:04:55,377 INFO L226 Difference]: Without dead ends: 148 [2020-09-15 01:04:55,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:04:55,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-15 01:04:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2020-09-15 01:04:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-15 01:04:55,381 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-15 01:04:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:55,382 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-15 01:04:55,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-15 01:04:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:55,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:55,383 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:55,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-15 01:04:55,590 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 23 times [2020-09-15 01:04:55,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:55,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94257521] [2020-09-15 01:04:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:55,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:55,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94257521] [2020-09-15 01:04:55,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652053109] [2020-09-15 01:04:55,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:55,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:55,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:55,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:55,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:55,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657429652] [2020-09-15 01:04:55,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:55,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:55,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:55,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:55,854 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-15 01:04:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:56,035 INFO L93 Difference]: Finished difference Result 147 states and 350 transitions. [2020-09-15 01:04:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:04:56,035 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:56,036 INFO L225 Difference]: With dead ends: 147 [2020-09-15 01:04:56,036 INFO L226 Difference]: Without dead ends: 145 [2020-09-15 01:04:56,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:04:56,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-15 01:04:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-09-15 01:04:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:04:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-15 01:04:56,041 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-15 01:04:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:56,041 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-15 01:04:56,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-15 01:04:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:56,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:56,042 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:56,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:56,252 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 24 times [2020-09-15 01:04:56,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:56,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706399177] [2020-09-15 01:04:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706399177] [2020-09-15 01:04:56,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008297093] [2020-09-15 01:04:56,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:56,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:56,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:56,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:56,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:56,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842198027] [2020-09-15 01:04:56,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:56,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:56,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:56,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:56,542 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-15 01:04:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:56,621 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-15 01:04:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:04:56,621 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:56,622 INFO L225 Difference]: With dead ends: 152 [2020-09-15 01:04:56,623 INFO L226 Difference]: Without dead ends: 150 [2020-09-15 01:04:56,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-15 01:04:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-15 01:04:56,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-15 01:04:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:04:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-15 01:04:56,627 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-15 01:04:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:56,629 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-15 01:04:56,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:56,629 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-15 01:04:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:56,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:56,630 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:56,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-09-15 01:04:56,831 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:56,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 25 times [2020-09-15 01:04:56,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:56,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256055164] [2020-09-15 01:04:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:56,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256055164] [2020-09-15 01:04:56,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520225004] [2020-09-15 01:04:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:57,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85011418] [2020-09-15 01:04:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:57,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:57,123 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-15 01:04:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:57,204 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-15 01:04:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:57,205 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:57,206 INFO L225 Difference]: With dead ends: 153 [2020-09-15 01:04:57,206 INFO L226 Difference]: Without dead ends: 151 [2020-09-15 01:04:57,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-15 01:04:57,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-15 01:04:57,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-15 01:04:57,210 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-15 01:04:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:57,211 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-15 01:04:57,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-15 01:04:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:57,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:57,212 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:57,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-15 01:04:57,422 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:57,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 26 times [2020-09-15 01:04:57,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:57,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211259329] [2020-09-15 01:04:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:57,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211259329] [2020-09-15 01:04:57,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282955264] [2020-09-15 01:04:57,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:57,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:57,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:57,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:57,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:57,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33483878] [2020-09-15 01:04:57,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:57,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:57,678 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-15 01:04:57,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:57,817 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-15 01:04:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:57,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:57,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:57,819 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:04:57,819 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:04:57,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:04:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:04:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-15 01:04:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 01:04:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-15 01:04:57,824 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-15 01:04:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:57,824 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-15 01:04:57,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-15 01:04:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:57,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:57,825 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:58,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:58,027 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:58,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:58,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 27 times [2020-09-15 01:04:58,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:58,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979008554] [2020-09-15 01:04:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:58,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979008554] [2020-09-15 01:04:58,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876298877] [2020-09-15 01:04:58,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:58,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:04:58,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:58,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:58,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:58,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:58,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030709745] [2020-09-15 01:04:58,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:58,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:58,316 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-15 01:04:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:58,409 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-15 01:04:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:04:58,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:58,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:58,411 INFO L225 Difference]: With dead ends: 148 [2020-09-15 01:04:58,411 INFO L226 Difference]: Without dead ends: 146 [2020-09-15 01:04:58,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:04:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-15 01:04:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-15 01:04:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:04:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-15 01:04:58,416 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-15 01:04:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:58,416 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-15 01:04:58,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-15 01:04:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:58,417 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:58,417 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:58,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-15 01:04:58,626 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:58,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:58,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 28 times [2020-09-15 01:04:58,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:58,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144584927] [2020-09-15 01:04:58,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144584927] [2020-09-15 01:04:58,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778786479] [2020-09-15 01:04:58,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:58,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:04:58,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:58,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:58,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:58,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:58,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:58,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806952156] [2020-09-15 01:04:58,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:58,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:58,869 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-15 01:04:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:58,996 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-09-15 01:04:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:58,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:58,999 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:04:58,999 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:04:58,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:04:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2020-09-15 01:04:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:04:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-15 01:04:59,003 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-15 01:04:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:59,003 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-15 01:04:59,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-15 01:04:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:59,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:59,004 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:59,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:59,214 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:59,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:59,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 29 times [2020-09-15 01:04:59,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:59,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035077959] [2020-09-15 01:04:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035077959] [2020-09-15 01:04:59,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142107125] [2020-09-15 01:04:59,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:59,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:04:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:59,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:59,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:04:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:04:59,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:04:59,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523531318] [2020-09-15 01:04:59,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:04:59,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:04:59,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:04:59,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:04:59,467 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 13 states. [2020-09-15 01:04:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:04:59,599 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-15 01:04:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:04:59,599 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:04:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:04:59,601 INFO L225 Difference]: With dead ends: 149 [2020-09-15 01:04:59,601 INFO L226 Difference]: Without dead ends: 147 [2020-09-15 01:04:59,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:04:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-15 01:04:59,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-15 01:04:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:04:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:04:59,605 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:04:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:04:59,605 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:04:59,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:04:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:04:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:04:59,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:04:59,606 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:04:59,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-15 01:04:59,807 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:04:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:04:59,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 30 times [2020-09-15 01:04:59,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:04:59,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500212850] [2020-09-15 01:04:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:04:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:04:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:04:59,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500212850] [2020-09-15 01:04:59,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646035262] [2020-09-15 01:04:59,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:04:59,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:04:59,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:04:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:04:59,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:00,049 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:00,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:00,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:00,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570879573] [2020-09-15 01:05:00,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:00,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:00,084 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-15 01:05:00,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:00,415 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-15 01:05:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:00,417 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:00,418 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:00,418 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:05:00,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:05:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-15 01:05:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:05:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-15 01:05:00,422 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-15 01:05:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:00,422 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-15 01:05:00,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-15 01:05:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:00,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:00,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:00,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-15 01:05:00,625 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 31 times [2020-09-15 01:05:00,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:00,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250485309] [2020-09-15 01:05:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:00,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250485309] [2020-09-15 01:05:00,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324101200] [2020-09-15 01:05:00,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:00,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:00,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:00,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:00,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:00,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:00,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108471453] [2020-09-15 01:05:00,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:00,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:00,907 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:01,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:01,153 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-15 01:05:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:01,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:01,155 INFO L225 Difference]: With dead ends: 156 [2020-09-15 01:05:01,155 INFO L226 Difference]: Without dead ends: 154 [2020-09-15 01:05:01,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:01,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-15 01:05:01,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-15 01:05:01,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:05:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:05:01,160 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:05:01,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:01,160 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:05:01,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:05:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:01,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:01,161 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:01,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-15 01:05:01,371 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:01,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 32 times [2020-09-15 01:05:01,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:01,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534005942] [2020-09-15 01:05:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:01,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534005942] [2020-09-15 01:05:01,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707378133] [2020-09-15 01:05:01,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:01,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:01,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:01,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:01,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:01,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:01,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:01,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:01,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830292520] [2020-09-15 01:05:01,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:01,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:01,660 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-15 01:05:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:02,107 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-15 01:05:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:02,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:02,110 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:02,110 INFO L226 Difference]: Without dead ends: 171 [2020-09-15 01:05:02,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:05:02,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-15 01:05:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-15 01:05:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-15 01:05:02,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-15 01:05:02,114 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-15 01:05:02,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:02,114 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-15 01:05:02,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:02,114 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-15 01:05:02,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:02,115 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:02,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:02,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-15 01:05:02,325 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:02,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 33 times [2020-09-15 01:05:02,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:02,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439687678] [2020-09-15 01:05:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:02,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439687678] [2020-09-15 01:05:02,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058967737] [2020-09-15 01:05:02,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:02,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:02,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:02,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:02,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:02,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:02,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:02,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:02,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659307402] [2020-09-15 01:05:02,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:02,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:02,628 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-15 01:05:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:02,917 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-15 01:05:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:02,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:02,919 INFO L225 Difference]: With dead ends: 166 [2020-09-15 01:05:02,919 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:02,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:02,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:02,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-15 01:05:02,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-15 01:05:02,923 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-15 01:05:02,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:02,923 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-15 01:05:02,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:02,923 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-15 01:05:02,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:02,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:02,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:03,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:03,125 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 34 times [2020-09-15 01:05:03,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:03,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923756631] [2020-09-15 01:05:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923756631] [2020-09-15 01:05:03,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144966269] [2020-09-15 01:05:03,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:03,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:03,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:03,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:03,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:03,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704428921] [2020-09-15 01:05:03,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:03,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:03,387 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-15 01:05:03,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:03,651 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-15 01:05:03,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:03,652 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:03,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:03,654 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:05:03,654 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:03,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:03,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-15 01:05:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-15 01:05:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-15 01:05:03,664 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-15 01:05:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:03,665 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-15 01:05:03,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-15 01:05:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:03,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:03,665 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:03,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-09-15 01:05:03,875 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:03,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 35 times [2020-09-15 01:05:03,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:03,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647172487] [2020-09-15 01:05:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:03,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:03,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647172487] [2020-09-15 01:05:03,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079241755] [2020-09-15 01:05:03,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:03,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:03,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:03,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:03,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:04,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:04,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:04,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714389209] [2020-09-15 01:05:04,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:04,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:04,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:04,112 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-15 01:05:04,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:04,470 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-15 01:05:04,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:05:04,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:04,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:04,472 INFO L225 Difference]: With dead ends: 170 [2020-09-15 01:05:04,472 INFO L226 Difference]: Without dead ends: 168 [2020-09-15 01:05:04,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-15 01:05:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-15 01:05:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-15 01:05:04,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-15 01:05:04,477 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-15 01:05:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:04,477 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-15 01:05:04,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:04,477 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-15 01:05:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:04,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:04,478 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:04,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:04,679 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:04,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:04,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 36 times [2020-09-15 01:05:04,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:04,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244499765] [2020-09-15 01:05:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:04,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244499765] [2020-09-15 01:05:04,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898071632] [2020-09-15 01:05:04,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:04,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:04,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:04,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:04,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:04,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313022511] [2020-09-15 01:05:04,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:04,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:04,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:04,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:04,927 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-15 01:05:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:05,347 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-15 01:05:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:05,348 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:05,349 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:05,350 INFO L226 Difference]: Without dead ends: 172 [2020-09-15 01:05:05,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:05:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-15 01:05:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-15 01:05:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-15 01:05:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-15 01:05:05,353 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-15 01:05:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:05,354 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-15 01:05:05,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-15 01:05:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:05,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:05,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-09-15 01:05:05,555 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 37 times [2020-09-15 01:05:05,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:05,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551796072] [2020-09-15 01:05:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:05,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551796072] [2020-09-15 01:05:05,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988183162] [2020-09-15 01:05:05,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:05,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:05,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:05,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:05,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:05,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140972466] [2020-09-15 01:05:05,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:05,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:05,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:05,799 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-15 01:05:06,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:06,305 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-15 01:05:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:06,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:06,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:06,307 INFO L225 Difference]: With dead ends: 190 [2020-09-15 01:05:06,308 INFO L226 Difference]: Without dead ends: 182 [2020-09-15 01:05:06,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-15 01:05:06,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-15 01:05:06,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-15 01:05:06,312 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-15 01:05:06,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:06,312 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-15 01:05:06,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:06,312 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-15 01:05:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:06,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:06,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:06,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-15 01:05:06,524 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 38 times [2020-09-15 01:05:06,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:06,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498979471] [2020-09-15 01:05:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:06,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498979471] [2020-09-15 01:05:06,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749395394] [2020-09-15 01:05:06,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:06,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:06,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:06,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:06,736 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:06,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:06,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:06,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882776226] [2020-09-15 01:05:06,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:06,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:06,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:06,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:06,750 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-15 01:05:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:07,211 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-15 01:05:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:07,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:07,213 INFO L225 Difference]: With dead ends: 180 [2020-09-15 01:05:07,213 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:07,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-15 01:05:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:07,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-15 01:05:07,218 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-15 01:05:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:07,219 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-15 01:05:07,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:07,219 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-15 01:05:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:07,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:07,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:07,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:07,430 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 39 times [2020-09-15 01:05:07,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:07,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080616419] [2020-09-15 01:05:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:07,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080616419] [2020-09-15 01:05:07,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585102956] [2020-09-15 01:05:07,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:07,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:07,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:07,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:07,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:07,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:07,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163261048] [2020-09-15 01:05:07,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:07,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:07,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:07,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:07,688 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-15 01:05:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:07,959 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-15 01:05:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:07,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:07,961 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:07,961 INFO L226 Difference]: Without dead ends: 162 [2020-09-15 01:05:07,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-15 01:05:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-15 01:05:07,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-15 01:05:07,965 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-15 01:05:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:07,965 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-15 01:05:07,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:07,966 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-15 01:05:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:07,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:07,966 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:08,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-15 01:05:08,172 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:08,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 40 times [2020-09-15 01:05:08,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:08,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449460995] [2020-09-15 01:05:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449460995] [2020-09-15 01:05:08,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906260335] [2020-09-15 01:05:08,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:08,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:08,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:08,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:08,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180383507] [2020-09-15 01:05:08,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:08,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:08,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:08,417 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-15 01:05:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:08,655 INFO L93 Difference]: Finished difference Result 159 states and 368 transitions. [2020-09-15 01:05:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:08,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:08,656 INFO L225 Difference]: With dead ends: 159 [2020-09-15 01:05:08,657 INFO L226 Difference]: Without dead ends: 157 [2020-09-15 01:05:08,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-15 01:05:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 118. [2020-09-15 01:05:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-15 01:05:08,660 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-15 01:05:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:08,662 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-15 01:05:08,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-15 01:05:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:08,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:08,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:08,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-15 01:05:08,873 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 41 times [2020-09-15 01:05:08,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:08,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271052883] [2020-09-15 01:05:08,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:08,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:08,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271052883] [2020-09-15 01:05:08,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630946601] [2020-09-15 01:05:08,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:09,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:09,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:09,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:09,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285021233] [2020-09-15 01:05:09,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:09,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:09,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:09,168 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-15 01:05:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:09,631 INFO L93 Difference]: Finished difference Result 175 states and 403 transitions. [2020-09-15 01:05:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:09,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:09,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:09,634 INFO L225 Difference]: With dead ends: 175 [2020-09-15 01:05:09,634 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:09,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=452, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 118. [2020-09-15 01:05:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-15 01:05:09,640 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-15 01:05:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:09,640 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-15 01:05:09,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-15 01:05:09,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:09,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:09,641 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:09,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-15 01:05:09,842 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 42 times [2020-09-15 01:05:09,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:09,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816043682] [2020-09-15 01:05:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:09,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:09,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816043682] [2020-09-15 01:05:09,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383336468] [2020-09-15 01:05:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:09,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:09,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:09,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:10,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:10,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:10,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343201335] [2020-09-15 01:05:10,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:10,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:10,088 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-15 01:05:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:10,458 INFO L93 Difference]: Finished difference Result 162 states and 374 transitions. [2020-09-15 01:05:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:10,459 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:10,461 INFO L225 Difference]: With dead ends: 162 [2020-09-15 01:05:10,461 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:05:10,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:05:10,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 118. [2020-09-15 01:05:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-15 01:05:10,464 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-15 01:05:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:10,464 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-15 01:05:10,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-15 01:05:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:10,465 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:10,465 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:10,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:10,676 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:10,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 43 times [2020-09-15 01:05:10,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:10,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837627079] [2020-09-15 01:05:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:10,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837627079] [2020-09-15 01:05:10,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912579603] [2020-09-15 01:05:10,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:10,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:10,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:10,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603847537] [2020-09-15 01:05:10,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:10,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:10,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:10,931 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-15 01:05:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:11,453 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-15 01:05:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:11,454 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:11,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:11,456 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:05:11,456 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 01:05:11,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:11,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 01:05:11,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 120. [2020-09-15 01:05:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-15 01:05:11,460 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-15 01:05:11,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:11,461 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-15 01:05:11,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-15 01:05:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:11,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:11,461 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:11,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:11,674 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:11,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:11,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 44 times [2020-09-15 01:05:11,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:11,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3066705] [2020-09-15 01:05:11,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:11,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3066705] [2020-09-15 01:05:11,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454812078] [2020-09-15 01:05:11,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:11,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:11,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:11,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:11,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:11,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:11,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:11,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970879028] [2020-09-15 01:05:11,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:11,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:11,885 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:12,344 INFO L93 Difference]: Finished difference Result 165 states and 396 transitions. [2020-09-15 01:05:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:12,344 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:12,346 INFO L225 Difference]: With dead ends: 165 [2020-09-15 01:05:12,346 INFO L226 Difference]: Without dead ends: 160 [2020-09-15 01:05:12,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:05:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-15 01:05:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2020-09-15 01:05:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-15 01:05:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-15 01:05:12,350 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-15 01:05:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:12,350 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-15 01:05:12,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-15 01:05:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:12,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:12,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:12,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:12,551 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 45 times [2020-09-15 01:05:12,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:12,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72986034] [2020-09-15 01:05:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:12,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72986034] [2020-09-15 01:05:12,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725713361] [2020-09-15 01:05:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:12,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:12,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:12,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:12,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:12,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:12,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332598956] [2020-09-15 01:05:12,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:12,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:12,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:12,825 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-15 01:05:13,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:13,520 INFO L93 Difference]: Finished difference Result 194 states and 461 transitions. [2020-09-15 01:05:13,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:13,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:13,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:13,522 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:05:13,522 INFO L226 Difference]: Without dead ends: 186 [2020-09-15 01:05:13,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:05:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-15 01:05:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2020-09-15 01:05:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-15 01:05:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-15 01:05:13,528 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-15 01:05:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:13,528 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-15 01:05:13,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-15 01:05:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:13,529 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:13,529 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:13,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:13,730 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:13,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:13,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 46 times [2020-09-15 01:05:13,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:13,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486315596] [2020-09-15 01:05:13,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:13,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:13,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486315596] [2020-09-15 01:05:13,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060467272] [2020-09-15 01:05:13,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:13,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:13,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:13,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:13,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:13,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:13,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541715065] [2020-09-15 01:05:13,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:13,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:13,997 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-15 01:05:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:14,405 INFO L93 Difference]: Finished difference Result 168 states and 393 transitions. [2020-09-15 01:05:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:05:14,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:14,407 INFO L225 Difference]: With dead ends: 168 [2020-09-15 01:05:14,407 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:14,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:05:14,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-15 01:05:14,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-15 01:05:14,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-15 01:05:14,412 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-15 01:05:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:14,412 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-15 01:05:14,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-15 01:05:14,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:14,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:14,413 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:14,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-15 01:05:14,623 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 47 times [2020-09-15 01:05:14,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:14,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275348840] [2020-09-15 01:05:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:14,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275348840] [2020-09-15 01:05:14,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703998607] [2020-09-15 01:05:14,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:14,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:14,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:14,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:14,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:14,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:14,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:14,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:14,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891361159] [2020-09-15 01:05:14,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:14,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:14,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:14,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:14,852 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-15 01:05:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:15,412 INFO L93 Difference]: Finished difference Result 181 states and 430 transitions. [2020-09-15 01:05:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:15,413 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:15,414 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:15,414 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:15,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:15,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:15,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 119. [2020-09-15 01:05:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-15 01:05:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-15 01:05:15,417 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-15 01:05:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:15,418 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-15 01:05:15,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-15 01:05:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:15,418 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:15,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:15,619 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:15,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 48 times [2020-09-15 01:05:15,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:15,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533522011] [2020-09-15 01:05:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:15,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533522011] [2020-09-15 01:05:15,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063390993] [2020-09-15 01:05:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:15,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:15,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-15 01:05:15,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:15,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:15,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:15,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-15 01:05:15,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199193422] [2020-09-15 01:05:15,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:05:15,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:05:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:05:15,844 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-15 01:05:16,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:16,483 INFO L93 Difference]: Finished difference Result 171 states and 400 transitions. [2020-09-15 01:05:16,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:05:16,484 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-15 01:05:16,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:16,486 INFO L225 Difference]: With dead ends: 171 [2020-09-15 01:05:16,486 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:16,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 114. [2020-09-15 01:05:16,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-15 01:05:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-15 01:05:16,489 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-15 01:05:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:16,490 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-15 01:05:16,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:05:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-15 01:05:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:16,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:16,490 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:16,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-15 01:05:16,691 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:16,692 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-15 01:05:16,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:16,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090017904] [2020-09-15 01:05:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:16,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090017904] [2020-09-15 01:05:16,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153917500] [2020-09-15 01:05:16,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:16,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:16,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:16,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:16,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:16,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:17,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 01:05:17,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301365493] [2020-09-15 01:05:17,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:05:17,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:05:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:17,008 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-15 01:05:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:17,187 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-15 01:05:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:17,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-15 01:05:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:17,189 INFO L225 Difference]: With dead ends: 164 [2020-09-15 01:05:17,189 INFO L226 Difference]: Without dead ends: 159 [2020-09-15 01:05:17,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-15 01:05:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-15 01:05:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-15 01:05:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-15 01:05:17,192 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-15 01:05:17,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:17,192 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-15 01:05:17,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:05:17,192 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-15 01:05:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:17,193 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:17,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:17,394 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:17,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:17,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-15 01:05:17,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:17,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160427600] [2020-09-15 01:05:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160427600] [2020-09-15 01:05:17,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761268609] [2020-09-15 01:05:17,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:17,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:17,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:17,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:17,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410432961] [2020-09-15 01:05:17,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:17,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:17,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:17,685 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-15 01:05:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:17,879 INFO L93 Difference]: Finished difference Result 158 states and 371 transitions. [2020-09-15 01:05:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:17,880 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:17,881 INFO L225 Difference]: With dead ends: 158 [2020-09-15 01:05:17,881 INFO L226 Difference]: Without dead ends: 155 [2020-09-15 01:05:17,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-15 01:05:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-09-15 01:05:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-15 01:05:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-15 01:05:17,885 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-15 01:05:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:17,886 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-15 01:05:17,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-15 01:05:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:17,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:17,886 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:18,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-15 01:05:18,092 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:18,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-15 01:05:18,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:18,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849065321] [2020-09-15 01:05:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:18,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849065321] [2020-09-15 01:05:18,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654304895] [2020-09-15 01:05:18,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:18,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:18,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:18,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:18,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:18,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:18,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:18,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522228762] [2020-09-15 01:05:18,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:18,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:18,419 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-15 01:05:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:18,686 INFO L93 Difference]: Finished difference Result 172 states and 398 transitions. [2020-09-15 01:05:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:18,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:18,689 INFO L225 Difference]: With dead ends: 172 [2020-09-15 01:05:18,689 INFO L226 Difference]: Without dead ends: 169 [2020-09-15 01:05:18,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-15 01:05:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2020-09-15 01:05:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-15 01:05:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-15 01:05:18,693 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-15 01:05:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:18,693 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-15 01:05:18,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-15 01:05:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:18,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:18,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:18,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:18,896 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-15 01:05:18,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:18,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51660757] [2020-09-15 01:05:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51660757] [2020-09-15 01:05:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991316481] [2020-09-15 01:05:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:19,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:05:19,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:19,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:19,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:19,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:19,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926674940] [2020-09-15 01:05:19,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:19,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:19,223 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-15 01:05:19,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:19,556 INFO L93 Difference]: Finished difference Result 177 states and 410 transitions. [2020-09-15 01:05:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:19,557 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:19,558 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:19,558 INFO L226 Difference]: Without dead ends: 174 [2020-09-15 01:05:19,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:05:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-15 01:05:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2020-09-15 01:05:19,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 01:05:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-15 01:05:19,563 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-15 01:05:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:19,565 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-15 01:05:19,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:19,565 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-15 01:05:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:19,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:19,566 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:19,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:19,777 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-15 01:05:19,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:19,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118840625] [2020-09-15 01:05:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118840625] [2020-09-15 01:05:19,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287406368] [2020-09-15 01:05:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:19,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:19,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:19,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:19,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:20,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:20,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:20,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126968413] [2020-09-15 01:05:20,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:20,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:20,074 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-15 01:05:20,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:20,451 INFO L93 Difference]: Finished difference Result 176 states and 410 transitions. [2020-09-15 01:05:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:05:20,452 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:20,453 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:20,453 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:20,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:20,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:20,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 132. [2020-09-15 01:05:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-15 01:05:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-15 01:05:20,457 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-15 01:05:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:20,458 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-15 01:05:20,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-15 01:05:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:20,459 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:20,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-09-15 01:05:20,669 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-15 01:05:20,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:20,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438119622] [2020-09-15 01:05:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:20,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438119622] [2020-09-15 01:05:20,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269550419] [2020-09-15 01:05:20,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:20,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:20,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:20,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:20,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839370085] [2020-09-15 01:05:20,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:20,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:20,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:20,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:20,956 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-15 01:05:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:21,272 INFO L93 Difference]: Finished difference Result 169 states and 398 transitions. [2020-09-15 01:05:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:21,272 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:21,274 INFO L225 Difference]: With dead ends: 169 [2020-09-15 01:05:21,274 INFO L226 Difference]: Without dead ends: 166 [2020-09-15 01:05:21,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=387, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-15 01:05:21,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2020-09-15 01:05:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-15 01:05:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-15 01:05:21,278 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-15 01:05:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:21,278 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-15 01:05:21,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:21,279 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-15 01:05:21,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-15 01:05:21,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:21,279 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:21,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:21,490 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:21,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:21,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-15 01:05:21,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:21,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715073128] [2020-09-15 01:05:21,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:21,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715073128] [2020-09-15 01:05:21,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313069284] [2020-09-15 01:05:21,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:21,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:21,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:21,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:21,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:21,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:21,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:21,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:21,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39663056] [2020-09-15 01:05:21,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:21,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:21,779 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-15 01:05:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:22,188 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-15 01:05:22,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:22,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-15 01:05:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:22,190 INFO L225 Difference]: With dead ends: 176 [2020-09-15 01:05:22,190 INFO L226 Difference]: Without dead ends: 170 [2020-09-15 01:05:22,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:22,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-15 01:05:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-15 01:05:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-15 01:05:22,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-15 01:05:22,194 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-15 01:05:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:22,194 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-15 01:05:22,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-15 01:05:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:22,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:22,195 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:22,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:22,395 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 49 times [2020-09-15 01:05:22,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:22,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408769726] [2020-09-15 01:05:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:22,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:22,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408769726] [2020-09-15 01:05:22,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76261402] [2020-09-15 01:05:22,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:22,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:22,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:22,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387226130] [2020-09-15 01:05:22,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:22,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:22,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:22,741 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-15 01:05:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:22,797 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-15 01:05:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-15 01:05:22,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:22,800 INFO L225 Difference]: With dead ends: 163 [2020-09-15 01:05:22,800 INFO L226 Difference]: Without dead ends: 161 [2020-09-15 01:05:22,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-15 01:05:22,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-15 01:05:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-15 01:05:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-15 01:05:22,804 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-15 01:05:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:22,805 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-15 01:05:22,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-15 01:05:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:22,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:23,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-15 01:05:23,006 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:23,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 50 times [2020-09-15 01:05:23,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:23,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621516794] [2020-09-15 01:05:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:23,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621516794] [2020-09-15 01:05:23,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208157577] [2020-09-15 01:05:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:23,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:23,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:23,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:23,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:23,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:23,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198164356] [2020-09-15 01:05:23,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:23,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:23,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:23,328 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:23,444 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-15 01:05:23,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:05:23,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:23,446 INFO L225 Difference]: With dead ends: 172 [2020-09-15 01:05:23,446 INFO L226 Difference]: Without dead ends: 170 [2020-09-15 01:05:23,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:23,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-15 01:05:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-15 01:05:23,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:23,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-15 01:05:23,450 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-15 01:05:23,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:23,450 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-15 01:05:23,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:23,450 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-15 01:05:23,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:23,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:23,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:23,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:23,652 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 51 times [2020-09-15 01:05:23,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:23,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864358992] [2020-09-15 01:05:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:23,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864358992] [2020-09-15 01:05:23,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139242431] [2020-09-15 01:05:23,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:23,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:23,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:24,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:24,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501667913] [2020-09-15 01:05:24,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:24,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:24,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:24,056 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-15 01:05:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:24,248 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-15 01:05:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:24,249 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:24,250 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:24,251 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:24,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:24,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:24,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-15 01:05:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-15 01:05:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-15 01:05:24,256 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-15 01:05:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:24,256 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-15 01:05:24,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:24,257 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-15 01:05:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:24,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:24,257 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:24,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-15 01:05:24,458 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 52 times [2020-09-15 01:05:24,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:24,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420462685] [2020-09-15 01:05:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420462685] [2020-09-15 01:05:24,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739893576] [2020-09-15 01:05:24,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:24,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:24,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:24,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:24,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:24,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:24,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:24,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707331688] [2020-09-15 01:05:24,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:24,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:24,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:24,820 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-15 01:05:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:25,086 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-15 01:05:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:25,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:25,089 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:25,089 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:25,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-15 01:05:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-15 01:05:25,096 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-15 01:05:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:25,096 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-15 01:05:25,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:25,096 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-15 01:05:25,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:25,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:25,098 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:25,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-15 01:05:25,312 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 53 times [2020-09-15 01:05:25,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:25,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038444722] [2020-09-15 01:05:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038444722] [2020-09-15 01:05:25,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523294498] [2020-09-15 01:05:25,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:25,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:25,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:25,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:25,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814430645] [2020-09-15 01:05:25,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:25,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:25,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:25,608 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-15 01:05:25,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:25,826 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-15 01:05:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:25,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:25,828 INFO L225 Difference]: With dead ends: 184 [2020-09-15 01:05:25,829 INFO L226 Difference]: Without dead ends: 182 [2020-09-15 01:05:25,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-15 01:05:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-15 01:05:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:05:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-15 01:05:25,833 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-15 01:05:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:25,833 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-15 01:05:25,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-15 01:05:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:25,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:25,834 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:26,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-15 01:05:26,044 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 54 times [2020-09-15 01:05:26,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:26,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420005188] [2020-09-15 01:05:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420005188] [2020-09-15 01:05:26,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089308995] [2020-09-15 01:05:26,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:26,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:26,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:26,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:26,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:26,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:26,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:26,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289389210] [2020-09-15 01:05:26,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:26,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:26,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:26,365 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-15 01:05:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:26,630 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-15 01:05:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:26,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:26,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:26,632 INFO L225 Difference]: With dead ends: 179 [2020-09-15 01:05:26,632 INFO L226 Difference]: Without dead ends: 177 [2020-09-15 01:05:26,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:26,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-15 01:05:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-15 01:05:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-15 01:05:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-15 01:05:26,636 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-15 01:05:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:26,636 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-15 01:05:26,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-15 01:05:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:26,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:26,637 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:26,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:26,838 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:26,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:26,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 55 times [2020-09-15 01:05:26,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:26,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578811176] [2020-09-15 01:05:26,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:26,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578811176] [2020-09-15 01:05:26,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507676535] [2020-09-15 01:05:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:27,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:27,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:27,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972417476] [2020-09-15 01:05:27,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:27,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:27,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:27,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:27,156 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-15 01:05:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:27,476 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-15 01:05:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:27,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:27,479 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:27,479 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:27,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2020-09-15 01:05:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:05:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-15 01:05:27,482 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-15 01:05:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:27,482 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-15 01:05:27,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-15 01:05:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:27,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:27,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:27,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:27,683 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 56 times [2020-09-15 01:05:27,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:27,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589765764] [2020-09-15 01:05:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589765764] [2020-09-15 01:05:27,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400682393] [2020-09-15 01:05:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:27,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:27,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:27,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:28,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:28,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:28,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002131962] [2020-09-15 01:05:28,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:28,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:28,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:28,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:28,004 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:28,340 INFO L93 Difference]: Finished difference Result 187 states and 443 transitions. [2020-09-15 01:05:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:28,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:28,342 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:28,342 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:28,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:05:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-15 01:05:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-15 01:05:28,346 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-15 01:05:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:28,346 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-15 01:05:28,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-15 01:05:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:28,347 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:28,347 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:28,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:28,548 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 57 times [2020-09-15 01:05:28,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:28,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396457653] [2020-09-15 01:05:28,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:28,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396457653] [2020-09-15 01:05:28,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333034462] [2020-09-15 01:05:28,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:28,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:28,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:28,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:28,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:28,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859621605] [2020-09-15 01:05:28,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:28,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:28,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:28,864 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-15 01:05:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:29,155 INFO L93 Difference]: Finished difference Result 181 states and 433 transitions. [2020-09-15 01:05:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:29,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:29,157 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:29,157 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 01:05:29,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:05:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 01:05:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 138. [2020-09-15 01:05:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-15 01:05:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-15 01:05:29,161 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-15 01:05:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:29,161 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-15 01:05:29,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-15 01:05:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:29,162 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:29,162 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:29,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:29,363 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 58 times [2020-09-15 01:05:29,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:29,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007676278] [2020-09-15 01:05:29,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007676278] [2020-09-15 01:05:29,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288837131] [2020-09-15 01:05:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:29,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:29,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:29,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:29,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:29,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:29,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177124427] [2020-09-15 01:05:29,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:29,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:29,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:29,744 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-15 01:05:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:29,835 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-15 01:05:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:05:29,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:29,837 INFO L225 Difference]: With dead ends: 182 [2020-09-15 01:05:29,837 INFO L226 Difference]: Without dead ends: 180 [2020-09-15 01:05:29,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-15 01:05:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-15 01:05:29,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-15 01:05:29,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:05:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-15 01:05:29,841 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-15 01:05:29,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:29,841 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-15 01:05:29,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:29,841 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-15 01:05:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:29,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:29,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:30,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-09-15 01:05:30,053 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:30,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 59 times [2020-09-15 01:05:30,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:30,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716924578] [2020-09-15 01:05:30,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716924578] [2020-09-15 01:05:30,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030286573] [2020-09-15 01:05:30,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:30,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:30,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:30,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:30,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297583789] [2020-09-15 01:05:30,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:30,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:30,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:30,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:30,413 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-15 01:05:30,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:30,536 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-15 01:05:30,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:30,537 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:30,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:30,539 INFO L225 Difference]: With dead ends: 185 [2020-09-15 01:05:30,539 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 01:05:30,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 01:05:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-15 01:05:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-15 01:05:30,543 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-15 01:05:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:30,543 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-15 01:05:30,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-15 01:05:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:30,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:30,544 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:30,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:30,746 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 60 times [2020-09-15 01:05:30,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:30,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056675849] [2020-09-15 01:05:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:30,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056675849] [2020-09-15 01:05:30,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698995278] [2020-09-15 01:05:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:30,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:30,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:32,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:32,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:32,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651531311] [2020-09-15 01:05:32,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:32,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:32,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:32,191 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:32,401 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-15 01:05:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:32,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:32,403 INFO L225 Difference]: With dead ends: 191 [2020-09-15 01:05:32,403 INFO L226 Difference]: Without dead ends: 189 [2020-09-15 01:05:32,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-15 01:05:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-15 01:05:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:32,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-15 01:05:32,407 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-15 01:05:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:32,408 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-15 01:05:32,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-15 01:05:32,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:32,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:32,409 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:32,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:32,610 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 61 times [2020-09-15 01:05:32,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:32,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958536689] [2020-09-15 01:05:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:32,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958536689] [2020-09-15 01:05:32,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173749371] [2020-09-15 01:05:32,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:32,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:32,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:32,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369396879] [2020-09-15 01:05:32,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:32,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:32,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:32,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:32,952 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-15 01:05:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:33,192 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-15 01:05:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:33,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:33,195 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:33,195 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:33,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-15 01:05:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-15 01:05:33,199 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-15 01:05:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:33,200 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-15 01:05:33,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-15 01:05:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:33,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:33,201 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:33,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:33,411 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:33,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:33,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 62 times [2020-09-15 01:05:33,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:33,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822999487] [2020-09-15 01:05:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:33,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822999487] [2020-09-15 01:05:33,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325518575] [2020-09-15 01:05:33,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:33,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:33,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:33,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:33,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:33,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:33,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:33,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072112251] [2020-09-15 01:05:33,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:33,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:33,751 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:33,992 INFO L93 Difference]: Finished difference Result 194 states and 455 transitions. [2020-09-15 01:05:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:33,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:33,995 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:05:33,995 INFO L226 Difference]: Without dead ends: 192 [2020-09-15 01:05:33,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-15 01:05:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 142. [2020-09-15 01:05:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-15 01:05:33,999 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-15 01:05:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:33,999 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-15 01:05:33,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-15 01:05:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:34,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:34,000 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:34,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:34,201 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:34,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 63 times [2020-09-15 01:05:34,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:34,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318311566] [2020-09-15 01:05:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:34,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318311566] [2020-09-15 01:05:34,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908217007] [2020-09-15 01:05:34,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:34,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:34,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:34,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:34,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806981736] [2020-09-15 01:05:34,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:34,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:34,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:34,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:34,539 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-15 01:05:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:34,836 INFO L93 Difference]: Finished difference Result 186 states and 443 transitions. [2020-09-15 01:05:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:34,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:34,842 INFO L225 Difference]: With dead ends: 186 [2020-09-15 01:05:34,843 INFO L226 Difference]: Without dead ends: 184 [2020-09-15 01:05:34,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:05:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-15 01:05:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 139. [2020-09-15 01:05:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:05:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-15 01:05:34,846 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-15 01:05:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:34,846 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-15 01:05:34,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-15 01:05:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:34,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:34,847 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:35,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-15 01:05:35,048 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 64 times [2020-09-15 01:05:35,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:35,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667762251] [2020-09-15 01:05:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:35,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667762251] [2020-09-15 01:05:35,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288010680] [2020-09-15 01:05:35,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:35,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:35,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:35,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:35,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:35,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426239298] [2020-09-15 01:05:35,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:35,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:35,427 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-15 01:05:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:35,552 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-15 01:05:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:05:35,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:35,554 INFO L225 Difference]: With dead ends: 178 [2020-09-15 01:05:35,554 INFO L226 Difference]: Without dead ends: 176 [2020-09-15 01:05:35,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:05:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-15 01:05:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-15 01:05:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-15 01:05:35,557 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-15 01:05:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:35,558 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-15 01:05:35,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-15 01:05:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:35,559 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:35,559 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:35,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-15 01:05:35,760 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:35,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 65 times [2020-09-15 01:05:35,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:35,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608671474] [2020-09-15 01:05:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:35,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608671474] [2020-09-15 01:05:35,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635604335] [2020-09-15 01:05:35,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:35,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:35,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:35,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:35,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:36,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:36,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785235838] [2020-09-15 01:05:36,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:36,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:36,113 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-15 01:05:36,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:36,241 INFO L93 Difference]: Finished difference Result 181 states and 428 transitions. [2020-09-15 01:05:36,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:36,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:36,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:36,243 INFO L225 Difference]: With dead ends: 181 [2020-09-15 01:05:36,244 INFO L226 Difference]: Without dead ends: 179 [2020-09-15 01:05:36,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-15 01:05:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2020-09-15 01:05:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-15 01:05:36,248 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-15 01:05:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:36,248 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-15 01:05:36,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-15 01:05:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:36,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:36,249 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:36,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:36,460 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 66 times [2020-09-15 01:05:36,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:36,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144723071] [2020-09-15 01:05:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144723071] [2020-09-15 01:05:36,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867756368] [2020-09-15 01:05:36,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:36,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:05:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:36,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:36,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:36,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197790011] [2020-09-15 01:05:36,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:36,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:36,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:36,828 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-15 01:05:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:37,057 INFO L93 Difference]: Finished difference Result 187 states and 440 transitions. [2020-09-15 01:05:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:37,058 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:37,060 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:37,060 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:37,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:05:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2020-09-15 01:05:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-15 01:05:37,063 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-15 01:05:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:37,064 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-15 01:05:37,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-15 01:05:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:37,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:37,064 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:37,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:37,266 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 67 times [2020-09-15 01:05:37,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:37,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121800266] [2020-09-15 01:05:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:37,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:37,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121800266] [2020-09-15 01:05:37,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441202718] [2020-09-15 01:05:37,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:37,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:37,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:37,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105414887] [2020-09-15 01:05:37,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:37,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:37,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:37,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:37,586 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-15 01:05:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:37,728 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-15 01:05:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:05:37,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:37,730 INFO L225 Difference]: With dead ends: 174 [2020-09-15 01:05:37,730 INFO L226 Difference]: Without dead ends: 172 [2020-09-15 01:05:37,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:05:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-15 01:05:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-15 01:05:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:05:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-15 01:05:37,734 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-15 01:05:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:37,734 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-15 01:05:37,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-15 01:05:37,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:37,735 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:37,735 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:37,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:37,945 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 68 times [2020-09-15 01:05:37,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:37,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820311009] [2020-09-15 01:05:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820311009] [2020-09-15 01:05:38,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712000210] [2020-09-15 01:05:38,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:38,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:38,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:38,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390736762] [2020-09-15 01:05:38,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:38,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:38,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:38,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:38,255 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-15 01:05:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:38,433 INFO L93 Difference]: Finished difference Result 177 states and 419 transitions. [2020-09-15 01:05:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:38,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:38,435 INFO L225 Difference]: With dead ends: 177 [2020-09-15 01:05:38,435 INFO L226 Difference]: Without dead ends: 175 [2020-09-15 01:05:38,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-15 01:05:38,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 141. [2020-09-15 01:05:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-15 01:05:38,439 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-15 01:05:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:38,439 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-15 01:05:38,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-15 01:05:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:38,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:38,440 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:38,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:38,642 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 69 times [2020-09-15 01:05:38,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:38,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101836819] [2020-09-15 01:05:38,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:38,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101836819] [2020-09-15 01:05:38,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524728342] [2020-09-15 01:05:38,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:38,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:05:38,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:38,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:38,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:38,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:38,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:38,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364416666] [2020-09-15 01:05:38,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:38,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:38,984 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-15 01:05:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:39,164 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-15 01:05:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:05:39,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:39,166 INFO L225 Difference]: With dead ends: 175 [2020-09-15 01:05:39,167 INFO L226 Difference]: Without dead ends: 173 [2020-09-15 01:05:39,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:05:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-15 01:05:39,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-15 01:05:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:39,171 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:39,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:39,171 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:39,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:39,171 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:39,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:39,172 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:39,172 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:39,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:39,379 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:39,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:39,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 70 times [2020-09-15 01:05:39,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:39,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545497091] [2020-09-15 01:05:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545497091] [2020-09-15 01:05:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553452933] [2020-09-15 01:05:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:39,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:39,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:39,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:39,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:39,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:39,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640856247] [2020-09-15 01:05:39,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:39,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:39,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:39,718 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:40,160 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-15 01:05:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:40,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:40,163 INFO L225 Difference]: With dead ends: 195 [2020-09-15 01:05:40,163 INFO L226 Difference]: Without dead ends: 190 [2020-09-15 01:05:40,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:40,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-15 01:05:40,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-15 01:05:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-15 01:05:40,166 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-15 01:05:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:40,166 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-15 01:05:40,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-15 01:05:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:40,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:40,167 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:40,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:40,368 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:40,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 71 times [2020-09-15 01:05:40,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:40,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288065805] [2020-09-15 01:05:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:40,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288065805] [2020-09-15 01:05:40,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032849235] [2020-09-15 01:05:40,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:40,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:40,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:40,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:40,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:40,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672493093] [2020-09-15 01:05:40,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:40,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:40,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:40,700 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:41,045 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-15 01:05:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:05:41,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:41,048 INFO L225 Difference]: With dead ends: 187 [2020-09-15 01:05:41,048 INFO L226 Difference]: Without dead ends: 185 [2020-09-15 01:05:41,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-15 01:05:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-15 01:05:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:41,051 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:41,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:41,052 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:41,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:41,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:41,052 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:41,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:41,253 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:41,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 72 times [2020-09-15 01:05:41,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:41,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225131230] [2020-09-15 01:05:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:41,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225131230] [2020-09-15 01:05:41,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758137644] [2020-09-15 01:05:41,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:41,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:41,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:41,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:41,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:41,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:41,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:41,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843925892] [2020-09-15 01:05:41,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:41,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:41,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:41,588 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:42,170 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-15 01:05:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:05:42,171 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:42,172 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:05:42,173 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:05:42,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=547, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:05:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:05:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-15 01:05:42,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:42,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:42,176 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:42,176 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:42,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:42,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:42,177 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:42,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-15 01:05:42,378 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:42,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:42,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 73 times [2020-09-15 01:05:42,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:42,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660675921] [2020-09-15 01:05:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:42,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660675921] [2020-09-15 01:05:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300438363] [2020-09-15 01:05:42,485 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:42,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:42,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:42,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:42,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:42,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034473656] [2020-09-15 01:05:42,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:42,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:42,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:42,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:42,694 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:43,129 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:05:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:43,130 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:43,131 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:05:43,131 INFO L226 Difference]: Without dead ends: 197 [2020-09-15 01:05:43,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:05:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-15 01:05:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-15 01:05:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-15 01:05:43,135 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-15 01:05:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:43,135 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-15 01:05:43,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-15 01:05:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:43,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:43,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:43,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:43,337 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:43,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:43,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 74 times [2020-09-15 01:05:43,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:43,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866192263] [2020-09-15 01:05:43,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:43,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866192263] [2020-09-15 01:05:43,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175436581] [2020-09-15 01:05:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:43,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:44,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:44,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:44,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911831655] [2020-09-15 01:05:44,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:44,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:44,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:44,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:44,242 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-15 01:05:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:44,621 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-15 01:05:44,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:05:44,622 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:44,623 INFO L225 Difference]: With dead ends: 198 [2020-09-15 01:05:44,623 INFO L226 Difference]: Without dead ends: 196 [2020-09-15 01:05:44,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:05:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-15 01:05:44,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-15 01:05:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:05:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-15 01:05:44,627 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-15 01:05:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:44,627 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-15 01:05:44,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-15 01:05:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:44,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:44,628 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:44,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-09-15 01:05:44,828 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:44,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:44,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 75 times [2020-09-15 01:05:44,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:44,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172640891] [2020-09-15 01:05:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:44,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172640891] [2020-09-15 01:05:44,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909434779] [2020-09-15 01:05:44,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:44,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:05:44,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:45,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:45,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:45,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352727824] [2020-09-15 01:05:45,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:45,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:45,159 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-15 01:05:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:45,684 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-15 01:05:45,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:05:45,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:45,687 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:05:45,687 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:05:45,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:05:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:05:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-15 01:05:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:05:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-15 01:05:45,692 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-15 01:05:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:45,692 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-15 01:05:45,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-15 01:05:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:45,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:45,693 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:45,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:45,895 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:45,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:45,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 76 times [2020-09-15 01:05:45,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:45,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592047663] [2020-09-15 01:05:45,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:46,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:46,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592047663] [2020-09-15 01:05:46,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984590678] [2020-09-15 01:05:46,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:46,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:05:46,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:46,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:46,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:46,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:46,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:46,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:46,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869309864] [2020-09-15 01:05:46,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:46,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:46,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:46,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:46,264 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-15 01:05:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:46,952 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-15 01:05:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:46,953 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:46,954 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:05:46,954 INFO L226 Difference]: Without dead ends: 212 [2020-09-15 01:05:46,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:05:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-15 01:05:46,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-15 01:05:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:05:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-15 01:05:46,959 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-15 01:05:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:46,959 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-15 01:05:46,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-15 01:05:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:46,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:46,960 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:47,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-15 01:05:47,161 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:47,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 77 times [2020-09-15 01:05:47,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:47,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152188113] [2020-09-15 01:05:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:47,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152188113] [2020-09-15 01:05:47,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163334767] [2020-09-15 01:05:47,268 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:47,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:05:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:47,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:49,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:49,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:49,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:49,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257910211] [2020-09-15 01:05:49,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:49,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=144, Unknown=1, NotChecked=0, Total=210 [2020-09-15 01:05:49,540 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-15 01:05:53,929 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:05:58,175 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-15 01:05:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:58,682 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-15 01:05:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:05:58,683 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:58,685 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:05:58,685 INFO L226 Difference]: Without dead ends: 228 [2020-09-15 01:05:58,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=307, Invalid=684, Unknown=1, NotChecked=0, Total=992 [2020-09-15 01:05:58,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-15 01:05:58,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-15 01:05:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:05:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-15 01:05:58,689 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-15 01:05:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:58,689 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-15 01:05:58,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-15 01:05:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:58,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:58,690 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:05:58,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-15 01:05:58,898 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:05:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:05:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 78 times [2020-09-15 01:05:58,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:05:58,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631875767] [2020-09-15 01:05:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:05:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:05:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:59,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631875767] [2020-09-15 01:05:59,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437545889] [2020-09-15 01:05:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:05:59,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:05:59,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:05:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:05:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:05:59,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:05:59,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:05:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:05:59,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:05:59,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:05:59,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950185428] [2020-09-15 01:05:59,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:05:59,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:05:59,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:05:59,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:05:59,249 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-15 01:05:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:05:59,942 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-15 01:05:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:05:59,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:05:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:05:59,944 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:05:59,944 INFO L226 Difference]: Without dead ends: 214 [2020-09-15 01:05:59,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=593, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:05:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-15 01:05:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-15 01:05:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:05:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-15 01:05:59,949 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-15 01:05:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:05:59,949 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-15 01:05:59,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:05:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-15 01:05:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:05:59,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:05:59,950 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:00,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-15 01:06:00,151 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:00,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:00,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 79 times [2020-09-15 01:06:00,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:00,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38696764] [2020-09-15 01:06:00,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38696764] [2020-09-15 01:06:00,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980535507] [2020-09-15 01:06:00,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:00,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:00,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:00,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:00,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562505809] [2020-09-15 01:06:00,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:00,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:00,444 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-15 01:06:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:00,783 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-15 01:06:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:06:00,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:00,785 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:06:00,786 INFO L226 Difference]: Without dead ends: 195 [2020-09-15 01:06:00,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-15 01:06:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-15 01:06:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:06:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-15 01:06:00,790 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-15 01:06:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:00,790 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-15 01:06:00,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-15 01:06:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:00,791 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:00,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:00,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:00,994 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 80 times [2020-09-15 01:06:00,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:00,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072593796] [2020-09-15 01:06:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:01,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072593796] [2020-09-15 01:06:01,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853519098] [2020-09-15 01:06:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:01,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:01,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:01,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:01,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:01,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:01,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669222033] [2020-09-15 01:06:01,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:01,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:01,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:01,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:01,306 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-15 01:06:01,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:01,671 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-15 01:06:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:06:01,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:01,672 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:06:01,673 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:06:01,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:06:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-15 01:06:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:06:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-15 01:06:01,677 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-15 01:06:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:01,677 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-15 01:06:01,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-15 01:06:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:01,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:01,678 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:01,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-15 01:06:01,879 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:01,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 81 times [2020-09-15 01:06:01,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:01,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816708936] [2020-09-15 01:06:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816708936] [2020-09-15 01:06:01,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150800462] [2020-09-15 01:06:01,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:02,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:06:02,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:02,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:02,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:02,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:02,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:02,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407369534] [2020-09-15 01:06:02,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:02,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:02,202 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-15 01:06:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:02,584 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-15 01:06:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:06:02,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:02,585 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:06:02,586 INFO L226 Difference]: Without dead ends: 195 [2020-09-15 01:06:02,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-15 01:06:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-15 01:06:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-15 01:06:02,589 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-15 01:06:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:02,589 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-15 01:06:02,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-15 01:06:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:02,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:02,590 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:02,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:02,791 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 82 times [2020-09-15 01:06:02,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:02,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318931380] [2020-09-15 01:06:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:02,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:02,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318931380] [2020-09-15 01:06:02,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682118333] [2020-09-15 01:06:02,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:02,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:06:02,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:02,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:03,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:03,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:03,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518000759] [2020-09-15 01:06:03,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:03,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:03,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:03,169 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-15 01:06:03,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:03,772 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-15 01:06:03,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:06:03,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:03,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:03,775 INFO L225 Difference]: With dead ends: 214 [2020-09-15 01:06:03,775 INFO L226 Difference]: Without dead ends: 212 [2020-09-15 01:06:03,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:03,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-15 01:06:03,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-15 01:06:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:06:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-15 01:06:03,780 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-15 01:06:03,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:03,781 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-15 01:06:03,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:03,781 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-15 01:06:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:03,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:03,782 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:03,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-15 01:06:03,990 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:03,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:03,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 83 times [2020-09-15 01:06:03,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:03,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793665697] [2020-09-15 01:06:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:04,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793665697] [2020-09-15 01:06:04,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699078627] [2020-09-15 01:06:04,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:04,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:04,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:04,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:04,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:04,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314478665] [2020-09-15 01:06:04,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:04,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:04,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:04,375 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-15 01:06:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:04,861 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-15 01:06:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:06:04,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:04,863 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:06:04,863 INFO L226 Difference]: Without dead ends: 215 [2020-09-15 01:06:04,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:06:04,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-15 01:06:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-15 01:06:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:06:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-15 01:06:04,867 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-15 01:06:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:04,868 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-15 01:06:04,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-15 01:06:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:04,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:04,868 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:05,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:05,069 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 84 times [2020-09-15 01:06:05,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:05,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535047659] [2020-09-15 01:06:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:05,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535047659] [2020-09-15 01:06:05,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657805460] [2020-09-15 01:06:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:05,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:06:05,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:05,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:05,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:05,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:05,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243074280] [2020-09-15 01:06:05,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:05,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:05,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:05,377 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-15 01:06:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:05,910 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-15 01:06:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:06:05,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:05,911 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:06:05,912 INFO L226 Difference]: Without dead ends: 209 [2020-09-15 01:06:05,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=559, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-15 01:06:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-15 01:06:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:05,915 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:05,916 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:05,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:05,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:05,916 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:06,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:06,117 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 85 times [2020-09-15 01:06:06,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:06,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367795075] [2020-09-15 01:06:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:06,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367795075] [2020-09-15 01:06:06,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248500234] [2020-09-15 01:06:06,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:06,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:06,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:06,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:06:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:06,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:06,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:06,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863739753] [2020-09-15 01:06:06,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:06,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:06,406 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:07,015 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-15 01:06:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:06:07,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:07,017 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:06:07,017 INFO L226 Difference]: Without dead ends: 206 [2020-09-15 01:06:07,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:06:07,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-15 01:06:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-15 01:06:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:07,020 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:07,021 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:07,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:07,021 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:07,021 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:07,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-09-15 01:06:07,222 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 86 times [2020-09-15 01:06:07,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:07,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849592050] [2020-09-15 01:06:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:07,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849592050] [2020-09-15 01:06:07,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580899955] [2020-09-15 01:06:07,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:07,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:07,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:07,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:07,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:07,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:07,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:07,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300600033] [2020-09-15 01:06:07,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:07,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:07,594 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:08,320 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-15 01:06:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:06:08,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:08,322 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:06:08,322 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:06:08,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:06:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:06:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-15 01:06:08,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-15 01:06:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-15 01:06:08,325 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-15 01:06:08,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:08,326 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-15 01:06:08,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-15 01:06:08,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:08,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:08,326 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:08,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-15 01:06:08,527 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:08,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:08,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 87 times [2020-09-15 01:06:08,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:08,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124091593] [2020-09-15 01:06:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:08,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124091593] [2020-09-15 01:06:08,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707779484] [2020-09-15 01:06:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:08,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:06:08,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:08,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:08,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:08,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:08,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088753771] [2020-09-15 01:06:08,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:08,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:08,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:08,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:08,839 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-15 01:06:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:09,465 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-15 01:06:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:06:09,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:09,467 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:06:09,467 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:06:09,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:06:09,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:06:09,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-15 01:06:09,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-15 01:06:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-15 01:06:09,471 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-15 01:06:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:09,471 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-15 01:06:09,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-15 01:06:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:09,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:09,471 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:09,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:09,672 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:09,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 88 times [2020-09-15 01:06:09,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:09,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297086369] [2020-09-15 01:06:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:09,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:09,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297086369] [2020-09-15 01:06:09,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451846308] [2020-09-15 01:06:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:09,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:06:09,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:09,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:09,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:09,959 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:06:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:09,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:09,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:09,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892764625] [2020-09-15 01:06:09,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:09,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:09,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:09,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:09,972 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-15 01:06:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:10,710 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-15 01:06:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:06:10,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:10,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:10,712 INFO L225 Difference]: With dead ends: 240 [2020-09-15 01:06:10,712 INFO L226 Difference]: Without dead ends: 232 [2020-09-15 01:06:10,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:06:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-15 01:06:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-15 01:06:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:06:10,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-15 01:06:10,715 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-15 01:06:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:10,716 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-15 01:06:10,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-15 01:06:10,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:10,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:10,716 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:10,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-15 01:06:10,921 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 89 times [2020-09-15 01:06:10,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:10,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653466507] [2020-09-15 01:06:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:11,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653466507] [2020-09-15 01:06:11,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180229294] [2020-09-15 01:06:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:11,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:11,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:11,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:11,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:11,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787460782] [2020-09-15 01:06:11,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:11,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:11,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:11,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:11,225 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-15 01:06:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:11,994 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-15 01:06:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:06:11,995 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:11,996 INFO L225 Difference]: With dead ends: 238 [2020-09-15 01:06:11,996 INFO L226 Difference]: Without dead ends: 230 [2020-09-15 01:06:11,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=357, Invalid=833, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:06:11,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-15 01:06:12,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-15 01:06:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-15 01:06:12,001 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-15 01:06:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:12,001 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-15 01:06:12,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:12,002 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-15 01:06:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:12,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:12,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:12,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-15 01:06:12,204 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 90 times [2020-09-15 01:06:12,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:12,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324073663] [2020-09-15 01:06:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:12,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:12,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324073663] [2020-09-15 01:06:12,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027960131] [2020-09-15 01:06:12,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:12,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:06:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:12,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:12,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:12,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:12,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513661777] [2020-09-15 01:06:12,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:12,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:12,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:12,518 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-15 01:06:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:12,877 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-15 01:06:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:06:12,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:12,879 INFO L225 Difference]: With dead ends: 195 [2020-09-15 01:06:12,879 INFO L226 Difference]: Without dead ends: 193 [2020-09-15 01:06:12,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:06:12,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-15 01:06:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-15 01:06:12,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:06:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-15 01:06:12,883 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-15 01:06:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:12,883 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-15 01:06:12,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:12,884 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-15 01:06:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:12,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:12,884 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:13,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-15 01:06:13,085 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:13,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 91 times [2020-09-15 01:06:13,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:13,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843181519] [2020-09-15 01:06:13,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:13,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843181519] [2020-09-15 01:06:13,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983367973] [2020-09-15 01:06:13,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:13,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:13,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:13,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:06:13,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414637029] [2020-09-15 01:06:13,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:06:13,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:13,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:06:13,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:06:13,403 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-15 01:06:14,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:06:14,038 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-15 01:06:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:06:14,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:06:14,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:06:14,040 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:06:14,040 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:06:14,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=569, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:06:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:06:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-15 01:06:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-15 01:06:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-15 01:06:14,043 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-15 01:06:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:06:14,044 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-15 01:06:14,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:06:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-15 01:06:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:06:14,044 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:06:14,045 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:06:14,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:14,253 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:06:14,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:06:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 92 times [2020-09-15 01:06:14,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:06:14,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122894996] [2020-09-15 01:06:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:06:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:06:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:14,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122894996] [2020-09-15 01:06:14,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277769818] [2020-09-15 01:06:14,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:06:14,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:06:14,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:06:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:06:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:06:14,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:06:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:06:15,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:06:15,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-15 01:06:15,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966935513] [2020-09-15 01:06:15,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-15 01:06:15,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:06:15,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-15 01:06:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=174, Unknown=1, NotChecked=0, Total=240 [2020-09-15 01:06:15,718 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-15 01:06:17,415 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-15 01:06:36,859 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-15 01:07:02,046 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-15 01:07:20,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:20,867 INFO L93 Difference]: Finished difference Result 242 states and 573 transitions. [2020-09-15 01:07:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:07:20,900 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-15 01:07:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:20,901 INFO L225 Difference]: With dead ends: 242 [2020-09-15 01:07:20,901 INFO L226 Difference]: Without dead ends: 237 [2020-09-15 01:07:20,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=402, Invalid=995, Unknown=9, NotChecked=0, Total=1406 [2020-09-15 01:07:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-15 01:07:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2020-09-15 01:07:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-15 01:07:20,904 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-15 01:07:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:20,905 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-15 01:07:20,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-15 01:07:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-15 01:07:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:20,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:20,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:21,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-15 01:07:21,115 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:21,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 93 times [2020-09-15 01:07:21,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:21,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903880545] [2020-09-15 01:07:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:21,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903880545] [2020-09-15 01:07:21,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628210311] [2020-09-15 01:07:21,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:21,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:21,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:21,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:21,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753166241] [2020-09-15 01:07:21,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:21,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:21,438 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-15 01:07:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:21,841 INFO L93 Difference]: Finished difference Result 192 states and 445 transitions. [2020-09-15 01:07:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:07:21,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:21,843 INFO L225 Difference]: With dead ends: 192 [2020-09-15 01:07:21,843 INFO L226 Difference]: Without dead ends: 190 [2020-09-15 01:07:21,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=426, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-15 01:07:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 141. [2020-09-15 01:07:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:07:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-15 01:07:21,846 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-15 01:07:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:21,846 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-15 01:07:21,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-15 01:07:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:21,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:21,847 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:22,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-15 01:07:22,048 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:22,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:22,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 94 times [2020-09-15 01:07:22,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:22,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114359166] [2020-09-15 01:07:22,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:22,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114359166] [2020-09-15 01:07:22,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767460613] [2020-09-15 01:07:22,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:22,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:22,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:22,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:22,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:22,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:22,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:22,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691453465] [2020-09-15 01:07:22,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:22,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:22,398 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-15 01:07:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:22,819 INFO L93 Difference]: Finished difference Result 203 states and 467 transitions. [2020-09-15 01:07:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:07:22,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:22,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:22,821 INFO L225 Difference]: With dead ends: 203 [2020-09-15 01:07:22,821 INFO L226 Difference]: Without dead ends: 201 [2020-09-15 01:07:22,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-15 01:07:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2020-09-15 01:07:22,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:22,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-15 01:07:22,824 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-15 01:07:22,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:22,824 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-15 01:07:22,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-15 01:07:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:22,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:22,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:23,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:23,026 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:23,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:23,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 95 times [2020-09-15 01:07:23,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:23,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145209130] [2020-09-15 01:07:23,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:23,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145209130] [2020-09-15 01:07:23,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566597124] [2020-09-15 01:07:23,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:23,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:23,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:23,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:23,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:23,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408193239] [2020-09-15 01:07:23,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:23,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:23,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:23,356 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-15 01:07:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:23,743 INFO L93 Difference]: Finished difference Result 194 states and 452 transitions. [2020-09-15 01:07:23,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:07:23,744 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:23,746 INFO L225 Difference]: With dead ends: 194 [2020-09-15 01:07:23,746 INFO L226 Difference]: Without dead ends: 192 [2020-09-15 01:07:23,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:07:23,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-15 01:07:23,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2020-09-15 01:07:23,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:23,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-15 01:07:23,750 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-15 01:07:23,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:23,750 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-15 01:07:23,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:23,751 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-15 01:07:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:23,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:23,751 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:23,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:23,963 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:23,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:23,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 96 times [2020-09-15 01:07:23,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:23,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910214499] [2020-09-15 01:07:23,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910214499] [2020-09-15 01:07:24,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483100026] [2020-09-15 01:07:24,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:24,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:24,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:24,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:24,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:24,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045033074] [2020-09-15 01:07:24,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:24,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:24,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:24,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:24,302 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-15 01:07:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:24,992 INFO L93 Difference]: Finished difference Result 210 states and 483 transitions. [2020-09-15 01:07:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:24,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:24,994 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:07:24,994 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:07:24,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:07:24,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:07:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2020-09-15 01:07:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:07:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-15 01:07:24,998 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-15 01:07:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:24,998 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-15 01:07:24,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-15 01:07:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:24,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:24,999 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:25,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:25,207 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 97 times [2020-09-15 01:07:25,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:25,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061476608] [2020-09-15 01:07:25,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:25,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061476608] [2020-09-15 01:07:25,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937277616] [2020-09-15 01:07:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:25,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:25,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:25,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:25,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:25,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694228276] [2020-09-15 01:07:25,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:25,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:25,553 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-15 01:07:26,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:26,203 INFO L93 Difference]: Finished difference Result 219 states and 501 transitions. [2020-09-15 01:07:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:26,204 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:26,205 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:07:26,205 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:07:26,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=624, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:07:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:07:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 140. [2020-09-15 01:07:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-15 01:07:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-15 01:07:26,208 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-15 01:07:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:26,208 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-15 01:07:26,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-15 01:07:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:26,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:26,209 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:26,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:26,409 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 98 times [2020-09-15 01:07:26,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:26,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132726525] [2020-09-15 01:07:26,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:26,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132726525] [2020-09-15 01:07:26,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855262032] [2020-09-15 01:07:26,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:26,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:26,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:26,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:26,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:26,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962057561] [2020-09-15 01:07:26,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:26,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:26,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:26,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:26,725 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-15 01:07:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:27,277 INFO L93 Difference]: Finished difference Result 196 states and 455 transitions. [2020-09-15 01:07:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:07:27,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:27,279 INFO L225 Difference]: With dead ends: 196 [2020-09-15 01:07:27,279 INFO L226 Difference]: Without dead ends: 194 [2020-09-15 01:07:27,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:07:27,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-15 01:07:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 139. [2020-09-15 01:07:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:27,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-15 01:07:27,282 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-15 01:07:27,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:27,282 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-15 01:07:27,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:27,282 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-15 01:07:27,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:27,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:27,283 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:27,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-15 01:07:27,484 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:27,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:27,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 99 times [2020-09-15 01:07:27,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:27,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174134719] [2020-09-15 01:07:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:27,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174134719] [2020-09-15 01:07:27,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003071180] [2020-09-15 01:07:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:27,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:27,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:27,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:27,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:27,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266988091] [2020-09-15 01:07:27,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:27,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:27,813 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:28,577 INFO L93 Difference]: Finished difference Result 211 states and 490 transitions. [2020-09-15 01:07:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:28,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:28,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:28,579 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:07:28,580 INFO L226 Difference]: Without dead ends: 209 [2020-09-15 01:07:28,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=785, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-15 01:07:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 141. [2020-09-15 01:07:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-15 01:07:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-15 01:07:28,583 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-15 01:07:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:28,583 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-15 01:07:28,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:28,584 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-15 01:07:28,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:28,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:28,584 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:28,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-15 01:07:28,785 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 100 times [2020-09-15 01:07:28,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:28,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985579880] [2020-09-15 01:07:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985579880] [2020-09-15 01:07:28,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702772234] [2020-09-15 01:07:28,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:28,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:28,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:28,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:28,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:29,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:29,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:29,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313012363] [2020-09-15 01:07:29,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:29,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:29,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:29,129 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-15 01:07:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:29,871 INFO L93 Difference]: Finished difference Result 215 states and 498 transitions. [2020-09-15 01:07:29,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:07:29,872 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:29,872 INFO L225 Difference]: With dead ends: 215 [2020-09-15 01:07:29,873 INFO L226 Difference]: Without dead ends: 213 [2020-09-15 01:07:29,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:07:29,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-15 01:07:29,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-15 01:07:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-15 01:07:29,877 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-15 01:07:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:29,877 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-15 01:07:29,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:29,877 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-15 01:07:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:29,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:29,878 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:30,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-15 01:07:30,080 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 101 times [2020-09-15 01:07:30,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:30,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742087477] [2020-09-15 01:07:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:30,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742087477] [2020-09-15 01:07:30,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749137774] [2020-09-15 01:07:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:30,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:30,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:30,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:30,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:30,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015850016] [2020-09-15 01:07:30,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:30,411 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-15 01:07:31,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:31,176 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:07:31,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:31,177 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:31,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:31,178 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:07:31,178 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:07:31,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:07:31,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 144. [2020-09-15 01:07:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:31,182 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:31,183 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:31,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:31,183 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:31,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:31,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:31,183 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:31,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:31,389 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:31,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:31,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 102 times [2020-09-15 01:07:31,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:31,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643719590] [2020-09-15 01:07:31,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:31,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643719590] [2020-09-15 01:07:31,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475629499] [2020-09-15 01:07:31,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:31,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:31,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:31,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:31,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:31,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:31,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:31,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997602004] [2020-09-15 01:07:31,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:31,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:31,685 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:32,399 INFO L93 Difference]: Finished difference Result 196 states and 472 transitions. [2020-09-15 01:07:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:32,400 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:32,401 INFO L225 Difference]: With dead ends: 196 [2020-09-15 01:07:32,401 INFO L226 Difference]: Without dead ends: 191 [2020-09-15 01:07:32,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=382, Invalid=808, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:07:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-15 01:07:32,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 144. [2020-09-15 01:07:32,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:32,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:32,406 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:32,406 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:32,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:32,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:32,407 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:32,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-15 01:07:32,607 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:32,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:32,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 103 times [2020-09-15 01:07:32,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:32,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713863125] [2020-09-15 01:07:32,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:32,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:32,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713863125] [2020-09-15 01:07:32,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522232938] [2020-09-15 01:07:32,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:32,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:32,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:32,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:32,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:32,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:32,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782310322] [2020-09-15 01:07:32,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:32,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:32,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:32,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:32,959 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:33,971 INFO L93 Difference]: Finished difference Result 227 states and 547 transitions. [2020-09-15 01:07:33,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:07:33,972 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:33,973 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:07:33,973 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:07:33,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=993, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:07:33,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 142. [2020-09-15 01:07:33,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-15 01:07:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-15 01:07:33,979 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-15 01:07:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:33,979 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-15 01:07:33,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-15 01:07:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:33,980 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:34,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:34,190 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 104 times [2020-09-15 01:07:34,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:34,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956039288] [2020-09-15 01:07:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:34,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956039288] [2020-09-15 01:07:34,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647267902] [2020-09-15 01:07:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:34,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:34,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:34,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:34,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:34,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065589948] [2020-09-15 01:07:34,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:34,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:34,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:34,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:34,512 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-15 01:07:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:35,388 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2020-09-15 01:07:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:07:35,389 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:35,390 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:07:35,390 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:07:35,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:07:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:07:35,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 144. [2020-09-15 01:07:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-15 01:07:35,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-15 01:07:35,394 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-15 01:07:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:35,394 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-15 01:07:35,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-15 01:07:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:35,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:35,395 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:35,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-15 01:07:35,596 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:35,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 105 times [2020-09-15 01:07:35,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:35,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627079466] [2020-09-15 01:07:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:35,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627079466] [2020-09-15 01:07:35,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318623153] [2020-09-15 01:07:35,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:35,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:07:35,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:35,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:35,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:35,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:35,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:35,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:35,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492159705] [2020-09-15 01:07:35,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:35,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:35,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:35,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:35,967 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-15 01:07:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:37,167 INFO L93 Difference]: Finished difference Result 247 states and 597 transitions. [2020-09-15 01:07:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:37,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:37,169 INFO L225 Difference]: With dead ends: 247 [2020-09-15 01:07:37,169 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:07:37,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=1034, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:07:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:07:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 146. [2020-09-15 01:07:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:07:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-15 01:07:37,172 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-15 01:07:37,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:37,172 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-15 01:07:37,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-15 01:07:37,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:37,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:37,173 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:37,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:37,374 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:37,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 106 times [2020-09-15 01:07:37,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:37,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240813448] [2020-09-15 01:07:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240813448] [2020-09-15 01:07:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703003515] [2020-09-15 01:07:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:37,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:37,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:37,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:37,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:37,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:37,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506130488] [2020-09-15 01:07:37,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:37,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:37,715 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-15 01:07:38,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:38,865 INFO L93 Difference]: Finished difference Result 246 states and 590 transitions. [2020-09-15 01:07:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:38,866 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:38,867 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:07:38,867 INFO L226 Difference]: Without dead ends: 238 [2020-09-15 01:07:38,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:07:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-15 01:07:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-15 01:07:38,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:38,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-15 01:07:38,872 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-15 01:07:38,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:38,872 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-15 01:07:38,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:38,872 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-15 01:07:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:38,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:38,873 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:39,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-09-15 01:07:39,083 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 107 times [2020-09-15 01:07:39,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:39,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552342904] [2020-09-15 01:07:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:39,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552342904] [2020-09-15 01:07:39,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838581089] [2020-09-15 01:07:39,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:39,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:39,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:39,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:39,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579531302] [2020-09-15 01:07:39,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:39,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:39,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:39,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:39,402 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-15 01:07:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:40,052 INFO L93 Difference]: Finished difference Result 209 states and 489 transitions. [2020-09-15 01:07:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:07:40,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:40,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:40,054 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:07:40,054 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:07:40,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:07:40,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:07:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 136. [2020-09-15 01:07:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-15 01:07:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-15 01:07:40,058 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-15 01:07:40,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:40,058 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-15 01:07:40,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:40,058 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-15 01:07:40,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:40,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:40,059 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:40,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:40,268 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:40,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 108 times [2020-09-15 01:07:40,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:40,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953385737] [2020-09-15 01:07:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:40,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953385737] [2020-09-15 01:07:40,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944032] [2020-09-15 01:07:40,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:40,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:40,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:40,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:40,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588592328] [2020-09-15 01:07:40,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:40,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:40,596 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-15 01:07:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:41,433 INFO L93 Difference]: Finished difference Result 205 states and 487 transitions. [2020-09-15 01:07:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:07:41,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:41,435 INFO L225 Difference]: With dead ends: 205 [2020-09-15 01:07:41,435 INFO L226 Difference]: Without dead ends: 203 [2020-09-15 01:07:41,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:07:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-15 01:07:41,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 137. [2020-09-15 01:07:41,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-15 01:07:41,439 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-15 01:07:41,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:41,439 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-15 01:07:41,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-15 01:07:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:41,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:41,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:41,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-15 01:07:41,641 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 109 times [2020-09-15 01:07:41,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:41,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685472579] [2020-09-15 01:07:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:41,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:41,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685472579] [2020-09-15 01:07:41,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39902374] [2020-09-15 01:07:41,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:41,949 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:41,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:41,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:41,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477110833] [2020-09-15 01:07:41,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:41,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:41,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:41,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:41,965 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:43,039 INFO L93 Difference]: Finished difference Result 228 states and 547 transitions. [2020-09-15 01:07:43,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:07:43,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:43,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:43,041 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:07:43,042 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:07:43,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=520, Invalid=1286, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:07:43,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:07:43,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 137. [2020-09-15 01:07:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-15 01:07:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-15 01:07:43,045 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-15 01:07:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:43,045 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-15 01:07:43,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:43,045 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-15 01:07:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:43,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:43,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:43,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-15 01:07:43,246 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:43,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:43,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 110 times [2020-09-15 01:07:43,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:43,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202548035] [2020-09-15 01:07:43,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:43,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202548035] [2020-09-15 01:07:43,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711729327] [2020-09-15 01:07:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:43,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:43,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:43,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:43,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:43,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:43,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:43,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:43,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947952949] [2020-09-15 01:07:43,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:43,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:43,552 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-15 01:07:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:44,513 INFO L93 Difference]: Finished difference Result 228 states and 550 transitions. [2020-09-15 01:07:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:44,514 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:44,515 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:07:44,515 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:07:44,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:07:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 133. [2020-09-15 01:07:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-15 01:07:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-15 01:07:44,519 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-15 01:07:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:44,519 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-15 01:07:44,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-15 01:07:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:44,520 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:44,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-15 01:07:44,728 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 111 times [2020-09-15 01:07:44,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:44,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239155803] [2020-09-15 01:07:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239155803] [2020-09-15 01:07:44,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327303958] [2020-09-15 01:07:44,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:44,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:07:44,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:44,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-15 01:07:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:45,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:45,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:45,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-15 01:07:45,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593327692] [2020-09-15 01:07:45,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-15 01:07:45,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-15 01:07:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-15 01:07:45,049 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-15 01:07:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:46,075 INFO L93 Difference]: Finished difference Result 224 states and 533 transitions. [2020-09-15 01:07:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:07:46,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-15 01:07:46,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:46,079 INFO L225 Difference]: With dead ends: 224 [2020-09-15 01:07:46,079 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:07:46,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=403, Invalid=1003, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:07:46,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:07:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 130. [2020-09-15 01:07:46,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-15 01:07:46,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-15 01:07:46,082 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-15 01:07:46,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:46,083 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-15 01:07:46,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-15 01:07:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-15 01:07:46,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:46,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:46,083 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:46,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:46,284 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-15 01:07:46,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:46,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320895626] [2020-09-15 01:07:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:46,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320895626] [2020-09-15 01:07:46,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724654672] [2020-09-15 01:07:46,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:46,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:07:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:46,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:07:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:46,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:46,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:07:46,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359028949] [2020-09-15 01:07:46,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:07:46,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:46,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:07:46,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:07:46,736 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-15 01:07:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:47,058 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-15 01:07:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:07:47,059 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-15 01:07:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:47,060 INFO L225 Difference]: With dead ends: 185 [2020-09-15 01:07:47,060 INFO L226 Difference]: Without dead ends: 180 [2020-09-15 01:07:47,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:07:47,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-15 01:07:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-15 01:07:47,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-15 01:07:47,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-15 01:07:47,065 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-15 01:07:47,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:47,066 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-15 01:07:47,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:07:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-15 01:07:47,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:47,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:47,067 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:47,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:47,279 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:47,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:47,279 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-15 01:07:47,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:47,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631334871] [2020-09-15 01:07:47,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:47,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631334871] [2020-09-15 01:07:47,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826458494] [2020-09-15 01:07:47,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:47,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:07:47,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:47,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:47,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:47,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:47,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549010888] [2020-09-15 01:07:47,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:47,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:47,723 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-15 01:07:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:48,016 INFO L93 Difference]: Finished difference Result 186 states and 435 transitions. [2020-09-15 01:07:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:07:48,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:48,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:48,018 INFO L225 Difference]: With dead ends: 186 [2020-09-15 01:07:48,018 INFO L226 Difference]: Without dead ends: 183 [2020-09-15 01:07:48,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:07:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-15 01:07:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2020-09-15 01:07:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:07:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-15 01:07:48,023 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-15 01:07:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:48,023 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-15 01:07:48,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:48,023 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-15 01:07:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:48,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:48,024 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:48,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-15 01:07:48,233 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:48,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:48,234 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-15 01:07:48,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:48,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841444349] [2020-09-15 01:07:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:48,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841444349] [2020-09-15 01:07:48,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701385975] [2020-09-15 01:07:48,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:48,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:48,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:48,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:48,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:48,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691139045] [2020-09-15 01:07:48,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:48,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:48,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:48,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:48,648 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-15 01:07:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:49,070 INFO L93 Difference]: Finished difference Result 203 states and 468 transitions. [2020-09-15 01:07:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:07:49,071 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:49,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:49,072 INFO L225 Difference]: With dead ends: 203 [2020-09-15 01:07:49,072 INFO L226 Difference]: Without dead ends: 200 [2020-09-15 01:07:49,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:07:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-15 01:07:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-09-15 01:07:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-15 01:07:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-15 01:07:49,076 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-15 01:07:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:49,076 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-15 01:07:49,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-15 01:07:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:49,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:49,077 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:49,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-15 01:07:49,277 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-15 01:07:49,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:49,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929011083] [2020-09-15 01:07:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:49,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929011083] [2020-09-15 01:07:49,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924692276] [2020-09-15 01:07:49,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:49,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:07:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:49,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:49,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:49,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467427138] [2020-09-15 01:07:49,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:49,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:49,679 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-15 01:07:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:50,211 INFO L93 Difference]: Finished difference Result 211 states and 486 transitions. [2020-09-15 01:07:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:07:50,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:50,213 INFO L225 Difference]: With dead ends: 211 [2020-09-15 01:07:50,213 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:07:50,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:07:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:07:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 149. [2020-09-15 01:07:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-15 01:07:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-15 01:07:50,217 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-15 01:07:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:50,217 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-15 01:07:50,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-15 01:07:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:50,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:50,218 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:50,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:50,428 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:50,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-15 01:07:50,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:50,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955248570] [2020-09-15 01:07:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:50,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955248570] [2020-09-15 01:07:50,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580296464] [2020-09-15 01:07:50,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:50,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:07:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:50,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:50,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:50,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:50,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947035729] [2020-09-15 01:07:50,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:50,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:50,847 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-15 01:07:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:51,519 INFO L93 Difference]: Finished difference Result 213 states and 492 transitions. [2020-09-15 01:07:51,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:07:51,520 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:51,521 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:07:51,521 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:07:51,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:07:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:07:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 150. [2020-09-15 01:07:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-15 01:07:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-15 01:07:51,527 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-15 01:07:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:51,527 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-15 01:07:51,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-15 01:07:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:51,528 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:51,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:51,741 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-15 01:07:51,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:51,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095920513] [2020-09-15 01:07:51,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:51,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095920513] [2020-09-15 01:07:51,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79494916] [2020-09-15 01:07:51,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:51,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:52,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:52,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:52,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328293781] [2020-09-15 01:07:52,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:52,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:52,114 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-15 01:07:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:52,698 INFO L93 Difference]: Finished difference Result 207 states and 482 transitions. [2020-09-15 01:07:52,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:07:52,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:52,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:52,700 INFO L225 Difference]: With dead ends: 207 [2020-09-15 01:07:52,700 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:07:52,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:07:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:07:52,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 152. [2020-09-15 01:07:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-15 01:07:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-15 01:07:52,703 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-15 01:07:52,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:52,703 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-15 01:07:52,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-15 01:07:52,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:52,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:52,704 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:52,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:52,905 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-15 01:07:52,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:52,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260869229] [2020-09-15 01:07:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:53,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260869229] [2020-09-15 01:07:53,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354914578] [2020-09-15 01:07:53,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:53,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:07:53,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:53,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:53,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:53,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:53,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630074191] [2020-09-15 01:07:53,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:53,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:53,275 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-15 01:07:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:53,754 INFO L93 Difference]: Finished difference Result 197 states and 464 transitions. [2020-09-15 01:07:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:07:53,758 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:53,759 INFO L225 Difference]: With dead ends: 197 [2020-09-15 01:07:53,759 INFO L226 Difference]: Without dead ends: 194 [2020-09-15 01:07:53,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:07:53,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-15 01:07:53,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 154. [2020-09-15 01:07:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-15 01:07:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-15 01:07:53,762 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-15 01:07:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:53,763 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-15 01:07:53,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-15 01:07:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-15 01:07:53,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:53,763 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:53,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-09-15 01:07:53,972 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-15 01:07:53,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:53,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619017753] [2020-09-15 01:07:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:54,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619017753] [2020-09-15 01:07:54,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633360326] [2020-09-15 01:07:54,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:54,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:07:54,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:54,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:54,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:07:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:54,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:54,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:54,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201433196] [2020-09-15 01:07:54,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:54,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:54,322 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-15 01:07:54,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:54,917 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-15 01:07:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:07:54,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-15 01:07:54,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:54,919 INFO L225 Difference]: With dead ends: 202 [2020-09-15 01:07:54,919 INFO L226 Difference]: Without dead ends: 196 [2020-09-15 01:07:54,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:07:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-15 01:07:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-15 01:07:54,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-15 01:07:54,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-15 01:07:54,923 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-15 01:07:54,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:54,923 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-15 01:07:54,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:54,923 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-15 01:07:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:07:54,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:54,924 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:55,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-15 01:07:55,124 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:55,125 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 112 times [2020-09-15 01:07:55,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:55,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053894926] [2020-09-15 01:07:55,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:55,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053894926] [2020-09-15 01:07:55,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614085741] [2020-09-15 01:07:55,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:55,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:07:55,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:55,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:55,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:55,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:55,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624332755] [2020-09-15 01:07:55,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:55,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:55,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:55,557 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-15 01:07:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:55,649 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-15 01:07:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-15 01:07:55,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:07:55,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:55,651 INFO L225 Difference]: With dead ends: 188 [2020-09-15 01:07:55,651 INFO L226 Difference]: Without dead ends: 186 [2020-09-15 01:07:55,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:55,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-15 01:07:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-15 01:07:55,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:07:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-15 01:07:55,656 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-15 01:07:55,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:55,656 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-15 01:07:55,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-15 01:07:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:07:55,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:55,657 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:55,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-15 01:07:55,869 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:55,870 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 113 times [2020-09-15 01:07:55,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:55,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560885816] [2020-09-15 01:07:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:56,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560885816] [2020-09-15 01:07:56,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215495517] [2020-09-15 01:07:56,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:56,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:07:56,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:56,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:56,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:56,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:56,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:56,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918858576] [2020-09-15 01:07:56,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:56,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:56,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:56,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:56,283 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-15 01:07:56,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:56,425 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-15 01:07:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:07:56,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:07:56,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:56,427 INFO L225 Difference]: With dead ends: 199 [2020-09-15 01:07:56,427 INFO L226 Difference]: Without dead ends: 197 [2020-09-15 01:07:56,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:07:56,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-15 01:07:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-15 01:07:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:07:56,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-15 01:07:56,430 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-15 01:07:56,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:56,430 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-15 01:07:56,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:56,431 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-15 01:07:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:07:56,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:56,431 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:56,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-15 01:07:56,635 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:56,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:56,636 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 114 times [2020-09-15 01:07:56,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:56,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518222750] [2020-09-15 01:07:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:56,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:56,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518222750] [2020-09-15 01:07:56,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441071368] [2020-09-15 01:07:56,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:56,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:07:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:07:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:57,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:57,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:57,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851657354] [2020-09-15 01:07:57,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:57,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:57,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:57,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:57,096 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-15 01:07:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:57,369 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-15 01:07:57,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:07:57,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:07:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:57,371 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:07:57,371 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:07:57,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:07:57,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:07:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-15 01:07:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-15 01:07:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-15 01:07:57,375 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-15 01:07:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:57,375 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-15 01:07:57,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:57,375 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-15 01:07:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:07:57,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:57,375 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:57,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-15 01:07:57,576 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:57,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 115 times [2020-09-15 01:07:57,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:57,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112895732] [2020-09-15 01:07:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:57,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:57,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112895732] [2020-09-15 01:07:57,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89809387] [2020-09-15 01:07:57,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:07:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:07:57,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:07:57,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:07:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:07:59,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:07:59,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:07:59,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469046153] [2020-09-15 01:07:59,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:07:59,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:07:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:07:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:07:59,338 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-15 01:07:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:07:59,676 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-15 01:07:59,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:07:59,677 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:07:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:07:59,678 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:07:59,678 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:07:59,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:07:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:07:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-15 01:07:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:07:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-15 01:07:59,682 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-15 01:07:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:07:59,682 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-15 01:07:59,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:07:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-15 01:07:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:07:59,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:07:59,683 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:07:59,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-15 01:07:59,884 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:07:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:07:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 116 times [2020-09-15 01:07:59,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:07:59,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950159293] [2020-09-15 01:07:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:07:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:00,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950159293] [2020-09-15 01:08:00,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097891389] [2020-09-15 01:08:00,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:00,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:00,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:00,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:03,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:03,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:03,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195716866] [2020-09-15 01:08:03,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:03,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:03,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:08:03,909 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-15 01:08:08,113 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:08:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:08,352 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:08:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:08,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:08,354 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:08,354 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:08,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=144, Invalid=317, Unknown=1, NotChecked=0, Total=462 [2020-09-15 01:08:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:08,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-15 01:08:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:08,358 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:08,358 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:08,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:08,359 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:08,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:08,359 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:08,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:08,560 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:08,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:08,560 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 117 times [2020-09-15 01:08:08,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:08,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560055322] [2020-09-15 01:08:08,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:08,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560055322] [2020-09-15 01:08:08,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28153181] [2020-09-15 01:08:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:08,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:08,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:09,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:09,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:09,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147108583] [2020-09-15 01:08:09,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:09,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:09,047 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:09,403 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-15 01:08:09,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:09,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:09,405 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:09,405 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:09,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:09,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-15 01:08:09,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-15 01:08:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-15 01:08:09,409 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-15 01:08:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:09,409 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-15 01:08:09,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:09,409 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-15 01:08:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:09,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:09,410 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:09,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-15 01:08:09,611 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:09,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:09,611 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 118 times [2020-09-15 01:08:09,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:09,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449577141] [2020-09-15 01:08:09,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:09,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449577141] [2020-09-15 01:08:09,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106213485] [2020-09-15 01:08:09,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:09,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:09,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:09,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:10,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:10,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:10,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200001089] [2020-09-15 01:08:10,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:10,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:10,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:10,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:10,022 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-15 01:08:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:10,391 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-15 01:08:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:10,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:10,393 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:10,393 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:10,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=418, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:10,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-15 01:08:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:10,396 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:10,396 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:10,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:10,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:10,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:10,397 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:10,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:10,598 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 119 times [2020-09-15 01:08:10,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:10,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453794093] [2020-09-15 01:08:10,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:10,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453794093] [2020-09-15 01:08:10,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236639420] [2020-09-15 01:08:10,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:10,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:10,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:11,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:11,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:11,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813284061] [2020-09-15 01:08:11,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:11,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:11,002 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:11,417 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-15 01:08:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:11,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:11,419 INFO L225 Difference]: With dead ends: 224 [2020-09-15 01:08:11,419 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:08:11,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:08:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-15 01:08:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:11,423 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:11,423 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:11,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:11,423 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:11,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:11,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:11,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:11,624 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 120 times [2020-09-15 01:08:11,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:11,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318821220] [2020-09-15 01:08:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:11,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318821220] [2020-09-15 01:08:11,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739362081] [2020-09-15 01:08:11,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:11,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:11,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:12,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:12,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:12,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799774697] [2020-09-15 01:08:12,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:12,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:12,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:12,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:12,034 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:12,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:12,404 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-15 01:08:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:12,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:12,406 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:12,406 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:12,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:08:12,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:12,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-15 01:08:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:08:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-15 01:08:12,410 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-15 01:08:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:12,410 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-15 01:08:12,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-15 01:08:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:12,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:12,411 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:12,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:12,613 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:12,613 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 121 times [2020-09-15 01:08:12,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:12,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012192426] [2020-09-15 01:08:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:12,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012192426] [2020-09-15 01:08:12,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068667835] [2020-09-15 01:08:12,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:12,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:12,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:12,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:12,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012603410] [2020-09-15 01:08:12,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:12,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:12,999 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:13,302 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-15 01:08:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:13,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:13,304 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:08:13,304 INFO L226 Difference]: Without dead ends: 204 [2020-09-15 01:08:13,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:13,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-15 01:08:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-15 01:08:13,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-15 01:08:13,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-15 01:08:13,307 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-15 01:08:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:13,307 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-15 01:08:13,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-15 01:08:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:13,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:13,308 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:13,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:13,509 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 122 times [2020-09-15 01:08:13,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:13,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795167173] [2020-09-15 01:08:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:13,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795167173] [2020-09-15 01:08:13,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022509982] [2020-09-15 01:08:13,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:13,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:13,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:13,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:13,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:13,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:13,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705326918] [2020-09-15 01:08:13,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:13,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:13,912 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-15 01:08:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:14,549 INFO L93 Difference]: Finished difference Result 210 states and 502 transitions. [2020-09-15 01:08:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:14,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:14,551 INFO L225 Difference]: With dead ends: 210 [2020-09-15 01:08:14,551 INFO L226 Difference]: Without dead ends: 208 [2020-09-15 01:08:14,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:08:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-15 01:08:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 159. [2020-09-15 01:08:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:08:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-15 01:08:14,556 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-15 01:08:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:14,557 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-15 01:08:14,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-15 01:08:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:14,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:14,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:14,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-15 01:08:14,759 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:14,759 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 123 times [2020-09-15 01:08:14,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:14,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000339506] [2020-09-15 01:08:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:14,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000339506] [2020-09-15 01:08:14,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806184664] [2020-09-15 01:08:14,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:14,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:14,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:15,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:15,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:15,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570526906] [2020-09-15 01:08:15,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:15,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:15,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:15,175 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-15 01:08:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:15,724 INFO L93 Difference]: Finished difference Result 216 states and 515 transitions. [2020-09-15 01:08:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:15,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:15,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:15,726 INFO L225 Difference]: With dead ends: 216 [2020-09-15 01:08:15,727 INFO L226 Difference]: Without dead ends: 214 [2020-09-15 01:08:15,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:08:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-15 01:08:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 158. [2020-09-15 01:08:15,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:08:15,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-15 01:08:15,730 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-15 01:08:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:15,737 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-15 01:08:15,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-15 01:08:15,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:15,738 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:15,738 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:15,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-15 01:08:15,938 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:15,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:15,939 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 124 times [2020-09-15 01:08:15,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:15,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427973327] [2020-09-15 01:08:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:16,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427973327] [2020-09-15 01:08:16,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390642249] [2020-09-15 01:08:16,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:16,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:16,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:16,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:16,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262194638] [2020-09-15 01:08:16,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:16,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:16,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:16,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:16,611 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-15 01:08:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:17,127 INFO L93 Difference]: Finished difference Result 227 states and 536 transitions. [2020-09-15 01:08:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:08:17,129 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:17,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:17,129 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:08:17,129 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:08:17,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:08:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:08:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-15 01:08:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:08:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-15 01:08:17,132 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-15 01:08:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:17,132 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-15 01:08:17,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-15 01:08:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:17,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:17,133 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:17,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-15 01:08:17,336 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:17,337 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 125 times [2020-09-15 01:08:17,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:17,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741810918] [2020-09-15 01:08:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:17,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741810918] [2020-09-15 01:08:17,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196368374] [2020-09-15 01:08:17,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:17,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:17,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:17,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:17,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:17,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:17,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248261606] [2020-09-15 01:08:17,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:17,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:17,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:17,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:17,741 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-15 01:08:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:18,167 INFO L93 Difference]: Finished difference Result 219 states and 521 transitions. [2020-09-15 01:08:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:08:18,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:18,169 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:08:18,169 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:08:18,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:08:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-15 01:08:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:08:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-15 01:08:18,173 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-15 01:08:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:18,174 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-15 01:08:18,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-15 01:08:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:18,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:18,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:18,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-15 01:08:18,377 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 126 times [2020-09-15 01:08:18,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:18,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243934319] [2020-09-15 01:08:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:18,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243934319] [2020-09-15 01:08:18,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547703225] [2020-09-15 01:08:18,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:18,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:18,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:18,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:18,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:18,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391389718] [2020-09-15 01:08:18,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:18,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:18,829 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-15 01:08:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:19,285 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:08:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:19,286 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:19,287 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:19,287 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:19,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=428, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 160. [2020-09-15 01:08:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:08:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-15 01:08:19,291 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-15 01:08:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:19,291 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-15 01:08:19,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-15 01:08:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:19,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:19,292 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:19,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:19,493 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 127 times [2020-09-15 01:08:19,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:19,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203740134] [2020-09-15 01:08:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203740134] [2020-09-15 01:08:19,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534883078] [2020-09-15 01:08:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:19,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:19,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:19,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:19,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427223264] [2020-09-15 01:08:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:19,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:19,924 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-15 01:08:20,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:20,290 INFO L93 Difference]: Finished difference Result 209 states and 498 transitions. [2020-09-15 01:08:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:20,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:20,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:20,292 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:08:20,292 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:08:20,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:20,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:08:20,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 158. [2020-09-15 01:08:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:08:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-15 01:08:20,295 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-15 01:08:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:20,295 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-15 01:08:20,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-15 01:08:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:20,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:20,296 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:20,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-09-15 01:08:20,497 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:20,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 128 times [2020-09-15 01:08:20,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:20,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752164380] [2020-09-15 01:08:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:20,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752164380] [2020-09-15 01:08:20,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378285874] [2020-09-15 01:08:20,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:20,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:20,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:20,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:20,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:21,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:21,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:21,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353987057] [2020-09-15 01:08:21,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:21,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:21,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:21,021 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-15 01:08:21,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:21,122 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-15 01:08:21,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:08:21,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:21,124 INFO L225 Difference]: With dead ends: 212 [2020-09-15 01:08:21,124 INFO L226 Difference]: Without dead ends: 210 [2020-09-15 01:08:21,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:08:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-15 01:08:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-15 01:08:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:08:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-15 01:08:21,128 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-15 01:08:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:21,128 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-15 01:08:21,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-15 01:08:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:21,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:21,129 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:21,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:21,330 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:21,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:21,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 129 times [2020-09-15 01:08:21,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:21,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419487013] [2020-09-15 01:08:21,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:21,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419487013] [2020-09-15 01:08:21,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694061050] [2020-09-15 01:08:21,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:21,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:21,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:21,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:21,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:21,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517759953] [2020-09-15 01:08:21,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:21,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:21,804 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-15 01:08:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:21,964 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-15 01:08:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:08:21,965 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:21,966 INFO L225 Difference]: With dead ends: 217 [2020-09-15 01:08:21,966 INFO L226 Difference]: Without dead ends: 215 [2020-09-15 01:08:21,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:08:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-15 01:08:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-15 01:08:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:08:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-15 01:08:21,970 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-15 01:08:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:21,970 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-15 01:08:21,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:21,970 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-15 01:08:21,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:21,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:21,970 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:22,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:22,171 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:22,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 130 times [2020-09-15 01:08:22,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:22,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98705505] [2020-09-15 01:08:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:22,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98705505] [2020-09-15 01:08:22,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208997747] [2020-09-15 01:08:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:22,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:22,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:22,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:22,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:23,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:23,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:23,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955999897] [2020-09-15 01:08:23,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:23,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:23,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:23,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:23,415 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-15 01:08:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:23,699 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-15 01:08:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:23,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:23,701 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:08:23,701 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:08:23,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:08:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:08:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-15 01:08:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:08:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-15 01:08:23,705 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-15 01:08:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:23,705 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-15 01:08:23,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-15 01:08:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:23,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:23,705 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:23,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:23,906 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 131 times [2020-09-15 01:08:23,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:23,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488548506] [2020-09-15 01:08:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:24,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488548506] [2020-09-15 01:08:24,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845716302] [2020-09-15 01:08:24,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:24,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:24,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:24,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:26,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:26,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:26,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796841073] [2020-09-15 01:08:26,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:26,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:26,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:26,506 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-15 01:08:26,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:26,869 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-15 01:08:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:26,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:26,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:26,871 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:26,871 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:26,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:08:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 164. [2020-09-15 01:08:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:08:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-15 01:08:26,874 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-15 01:08:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:26,874 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-15 01:08:26,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-15 01:08:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:26,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:26,875 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:27,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-09-15 01:08:27,075 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 132 times [2020-09-15 01:08:27,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:27,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974508512] [2020-09-15 01:08:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:27,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974508512] [2020-09-15 01:08:27,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865036115] [2020-09-15 01:08:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:27,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:08:27,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:27,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:31,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:31,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:31,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723546007] [2020-09-15 01:08:31,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:31,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:08:31,262 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-15 01:08:35,481 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:08:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:35,739 INFO L93 Difference]: Finished difference Result 233 states and 545 transitions. [2020-09-15 01:08:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:35,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:35,741 INFO L225 Difference]: With dead ends: 233 [2020-09-15 01:08:35,741 INFO L226 Difference]: Without dead ends: 231 [2020-09-15 01:08:35,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=146, Invalid=359, Unknown=1, NotChecked=0, Total=506 [2020-09-15 01:08:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-15 01:08:35,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-15 01:08:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:35,745 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:35,745 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:35,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:35,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:35,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:35,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:35,948 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 133 times [2020-09-15 01:08:35,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:35,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946066567] [2020-09-15 01:08:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:36,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946066567] [2020-09-15 01:08:36,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042328534] [2020-09-15 01:08:36,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:36,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:36,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:36,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:36,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:36,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149525833] [2020-09-15 01:08:36,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:36,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:36,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:36,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:36,481 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:36,866 INFO L93 Difference]: Finished difference Result 225 states and 533 transitions. [2020-09-15 01:08:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:36,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:36,867 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:36,868 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:36,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:08:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:36,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 160. [2020-09-15 01:08:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:08:36,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-15 01:08:36,872 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-15 01:08:36,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:36,872 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-15 01:08:36,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-15 01:08:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:36,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:36,873 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:37,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-15 01:08:37,074 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:37,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:37,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 134 times [2020-09-15 01:08:37,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:37,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792278201] [2020-09-15 01:08:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:37,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:37,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792278201] [2020-09-15 01:08:37,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506910805] [2020-09-15 01:08:37,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:37,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:37,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:37,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:37,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:37,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782144971] [2020-09-15 01:08:37,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:37,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:37,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:37,504 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-15 01:08:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:37,943 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-15 01:08:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:37,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:37,945 INFO L225 Difference]: With dead ends: 225 [2020-09-15 01:08:37,946 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:08:37,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:08:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-15 01:08:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:37,950 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:37,950 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:37,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:37,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:37,950 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:38,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:38,151 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 135 times [2020-09-15 01:08:38,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:38,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435820158] [2020-09-15 01:08:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:38,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435820158] [2020-09-15 01:08:38,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215048275] [2020-09-15 01:08:38,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-15 01:08:38,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:38,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:38,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:38,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:38,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088303559] [2020-09-15 01:08:38,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:38,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:38,591 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:39,029 INFO L93 Difference]: Finished difference Result 235 states and 549 transitions. [2020-09-15 01:08:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:39,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:39,031 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:08:39,031 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:08:39,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:08:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:08:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-15 01:08:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:39,035 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:39,035 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:39,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:39,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:39,036 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:39,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-15 01:08:39,237 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 136 times [2020-09-15 01:08:39,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:39,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145081318] [2020-09-15 01:08:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:39,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145081318] [2020-09-15 01:08:39,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601736699] [2020-09-15 01:08:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:39,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:39,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:39,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:39,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:39,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:39,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352553199] [2020-09-15 01:08:39,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:39,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:39,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:39,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:39,678 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:40,104 INFO L93 Difference]: Finished difference Result 230 states and 542 transitions. [2020-09-15 01:08:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:08:40,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:40,106 INFO L225 Difference]: With dead ends: 230 [2020-09-15 01:08:40,106 INFO L226 Difference]: Without dead ends: 228 [2020-09-15 01:08:40,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2020-09-15 01:08:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-15 01:08:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 163. [2020-09-15 01:08:40,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-15 01:08:40,109 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-15 01:08:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:40,109 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-15 01:08:40,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:40,110 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-15 01:08:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:40,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:40,117 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:40,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-15 01:08:40,322 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:40,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 137 times [2020-09-15 01:08:40,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:40,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879324553] [2020-09-15 01:08:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:40,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879324553] [2020-09-15 01:08:40,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66571158] [2020-09-15 01:08:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:40,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:40,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:40,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:40,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:40,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:40,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882113198] [2020-09-15 01:08:40,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:40,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:40,747 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-15 01:08:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:41,065 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-15 01:08:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:41,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:41,067 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:08:41,067 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:08:41,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:08:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:08:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-15 01:08:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:08:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-15 01:08:41,070 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-15 01:08:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:41,071 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-15 01:08:41,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-15 01:08:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:41,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:41,071 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:41,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:41,273 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:41,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:41,273 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 138 times [2020-09-15 01:08:41,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:41,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646244310] [2020-09-15 01:08:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:41,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646244310] [2020-09-15 01:08:41,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40501375] [2020-09-15 01:08:41,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:41,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:41,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:41,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:41,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:41,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307752851] [2020-09-15 01:08:41,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:41,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:41,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:41,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:41,780 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-15 01:08:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:41,920 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-15 01:08:41,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:08:41,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:41,921 INFO L225 Difference]: With dead ends: 208 [2020-09-15 01:08:41,922 INFO L226 Difference]: Without dead ends: 206 [2020-09-15 01:08:41,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:08:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-15 01:08:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-15 01:08:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:08:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-15 01:08:41,925 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-15 01:08:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:41,926 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-15 01:08:41,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-15 01:08:41,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:41,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:41,927 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:42,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:42,135 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:42,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:42,136 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 139 times [2020-09-15 01:08:42,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:42,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293435482] [2020-09-15 01:08:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:42,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293435482] [2020-09-15 01:08:42,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978508674] [2020-09-15 01:08:42,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:42,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:42,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:42,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:42,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825754035] [2020-09-15 01:08:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:42,660 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-15 01:08:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:42,878 INFO L93 Difference]: Finished difference Result 213 states and 504 transitions. [2020-09-15 01:08:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:42,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:42,880 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:08:42,880 INFO L226 Difference]: Without dead ends: 211 [2020-09-15 01:08:42,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:42,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-15 01:08:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2020-09-15 01:08:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-15 01:08:42,884 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-15 01:08:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:42,884 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-15 01:08:42,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-15 01:08:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:42,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:42,885 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:43,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-15 01:08:43,093 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 140 times [2020-09-15 01:08:43,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:43,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276132759] [2020-09-15 01:08:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:43,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276132759] [2020-09-15 01:08:43,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798646743] [2020-09-15 01:08:43,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:43,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:43,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:43,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:43,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:43,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:43,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:43,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176667092] [2020-09-15 01:08:43,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:43,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:43,579 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-15 01:08:43,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:43,899 INFO L93 Difference]: Finished difference Result 223 states and 524 transitions. [2020-09-15 01:08:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:43,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:43,900 INFO L225 Difference]: With dead ends: 223 [2020-09-15 01:08:43,900 INFO L226 Difference]: Without dead ends: 221 [2020-09-15 01:08:43,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:08:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-15 01:08:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 161. [2020-09-15 01:08:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:08:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-15 01:08:43,905 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-15 01:08:43,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:43,905 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-15 01:08:43,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:43,905 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-15 01:08:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:43,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:43,906 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:44,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:44,116 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:44,116 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 141 times [2020-09-15 01:08:44,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:44,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11922192] [2020-09-15 01:08:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:44,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11922192] [2020-09-15 01:08:44,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517068] [2020-09-15 01:08:44,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:44,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:08:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:47,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:47,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:47,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198078421] [2020-09-15 01:08:47,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:47,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:47,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:47,019 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-15 01:08:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:47,424 INFO L93 Difference]: Finished difference Result 221 states and 520 transitions. [2020-09-15 01:08:47,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:08:47,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:47,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:47,426 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:08:47,427 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:08:47,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:08:47,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:08:47,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2020-09-15 01:08:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:47,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-15 01:08:47,430 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-15 01:08:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:47,430 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-15 01:08:47,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-15 01:08:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:47,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:47,430 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:47,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:47,631 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:47,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 142 times [2020-09-15 01:08:47,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:47,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432499857] [2020-09-15 01:08:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:47,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432499857] [2020-09-15 01:08:47,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672670030] [2020-09-15 01:08:47,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:47,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:08:47,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:47,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:51,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:51,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:51,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222301384] [2020-09-15 01:08:51,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:51,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:51,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:51,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:08:51,915 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-15 01:08:56,175 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:08:56,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:56,456 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-15 01:08:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:56,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:56,458 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:08:56,458 INFO L226 Difference]: Without dead ends: 227 [2020-09-15 01:08:56,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=149, Invalid=402, Unknown=1, NotChecked=0, Total=552 [2020-09-15 01:08:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-15 01:08:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-15 01:08:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:08:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-15 01:08:56,462 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-15 01:08:56,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:56,462 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-15 01:08:56,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:56,462 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-15 01:08:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:56,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:56,463 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:56,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:56,672 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 143 times [2020-09-15 01:08:56,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:56,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667904393] [2020-09-15 01:08:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:56,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667904393] [2020-09-15 01:08:56,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525199814] [2020-09-15 01:08:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:56,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:08:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:56,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:56,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:57,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:57,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:57,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747898961] [2020-09-15 01:08:57,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:57,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:57,166 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-15 01:08:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:57,626 INFO L93 Difference]: Finished difference Result 221 states and 524 transitions. [2020-09-15 01:08:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:08:57,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:57,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:57,628 INFO L225 Difference]: With dead ends: 221 [2020-09-15 01:08:57,628 INFO L226 Difference]: Without dead ends: 219 [2020-09-15 01:08:57,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:08:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-15 01:08:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2020-09-15 01:08:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:08:57,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-15 01:08:57,631 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-15 01:08:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:57,631 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-15 01:08:57,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-15 01:08:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:57,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:57,632 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:57,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-09-15 01:08:57,833 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 144 times [2020-09-15 01:08:57,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:57,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394308640] [2020-09-15 01:08:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:58,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394308640] [2020-09-15 01:08:58,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374166053] [2020-09-15 01:08:58,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:58,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:08:58,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:58,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:58,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:58,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:58,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:58,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658528041] [2020-09-15 01:08:58,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:58,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:58,314 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-15 01:08:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:58,493 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-15 01:08:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:08:58,495 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:58,495 INFO L225 Difference]: With dead ends: 204 [2020-09-15 01:08:58,495 INFO L226 Difference]: Without dead ends: 202 [2020-09-15 01:08:58,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:08:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-15 01:08:58,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-15 01:08:58,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:08:58,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-15 01:08:58,499 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-15 01:08:58,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:58,499 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-15 01:08:58,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:58,499 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-15 01:08:58,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:58,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:58,500 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:58,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:58,701 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 145 times [2020-09-15 01:08:58,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:58,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470119284] [2020-09-15 01:08:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:58,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470119284] [2020-09-15 01:08:58,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582295235] [2020-09-15 01:08:58,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:58,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:08:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:59,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:08:59,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:08:59,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521105537] [2020-09-15 01:08:59,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:08:59,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:08:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:08:59,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:08:59,150 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-15 01:08:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:08:59,393 INFO L93 Difference]: Finished difference Result 209 states and 495 transitions. [2020-09-15 01:08:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:08:59,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:08:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:08:59,395 INFO L225 Difference]: With dead ends: 209 [2020-09-15 01:08:59,395 INFO L226 Difference]: Without dead ends: 207 [2020-09-15 01:08:59,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:08:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-15 01:08:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2020-09-15 01:08:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:08:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-15 01:08:59,398 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-15 01:08:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:08:59,398 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-15 01:08:59,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:08:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-15 01:08:59,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:08:59,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:08:59,399 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:08:59,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-15 01:08:59,600 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:08:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:08:59,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 146 times [2020-09-15 01:08:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:08:59,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632617342] [2020-09-15 01:08:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:08:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:08:59,756 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:08:59,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632617342] [2020-09-15 01:08:59,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369665511] [2020-09-15 01:08:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:08:59,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:08:59,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:08:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:08:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:00,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:00,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:00,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960307396] [2020-09-15 01:09:00,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:00,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:00,099 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-15 01:09:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:00,551 INFO L93 Difference]: Finished difference Result 219 states and 515 transitions. [2020-09-15 01:09:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:00,552 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:00,553 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:09:00,553 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:09:00,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-09-15 01:09:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:09:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 161. [2020-09-15 01:09:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:09:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-15 01:09:00,557 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-15 01:09:00,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:00,558 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-15 01:09:00,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-15 01:09:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:00,558 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:00,558 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:00,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-15 01:09:00,759 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 147 times [2020-09-15 01:09:00,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:00,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073633201] [2020-09-15 01:09:00,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:00,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073633201] [2020-09-15 01:09:00,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689018592] [2020-09-15 01:09:00,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:00,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:01,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:01,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:01,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:01,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:01,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539745711] [2020-09-15 01:09:01,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:01,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:01,226 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-15 01:09:01,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:01,471 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-15 01:09:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:09:01,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:01,473 INFO L225 Difference]: With dead ends: 200 [2020-09-15 01:09:01,473 INFO L226 Difference]: Without dead ends: 198 [2020-09-15 01:09:01,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-15 01:09:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-15 01:09:01,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-15 01:09:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-15 01:09:01,477 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-15 01:09:01,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:01,477 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-15 01:09:01,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-15 01:09:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:01,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:01,478 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:01,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:01,680 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 148 times [2020-09-15 01:09:01,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:01,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298900861] [2020-09-15 01:09:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:01,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298900861] [2020-09-15 01:09:01,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148098463] [2020-09-15 01:09:01,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:01,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:01,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:02,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:02,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:02,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447666093] [2020-09-15 01:09:02,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:02,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:02,128 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-15 01:09:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:02,436 INFO L93 Difference]: Finished difference Result 205 states and 486 transitions. [2020-09-15 01:09:02,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:02,438 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:02,438 INFO L225 Difference]: With dead ends: 205 [2020-09-15 01:09:02,438 INFO L226 Difference]: Without dead ends: 203 [2020-09-15 01:09:02,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:09:02,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-15 01:09:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 162. [2020-09-15 01:09:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-15 01:09:02,449 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-15 01:09:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:02,449 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-15 01:09:02,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-15 01:09:02,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:02,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:02,450 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:02,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-15 01:09:02,650 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:02,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 149 times [2020-09-15 01:09:02,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:02,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017978015] [2020-09-15 01:09:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:02,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:02,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017978015] [2020-09-15 01:09:02,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304256795] [2020-09-15 01:09:02,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:02,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:02,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:02,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:03,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:03,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:03,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:03,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481226479] [2020-09-15 01:09:03,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:03,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:03,085 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 17 states. [2020-09-15 01:09:03,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:03,376 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-15 01:09:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:09:03,377 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:03,378 INFO L225 Difference]: With dead ends: 201 [2020-09-15 01:09:03,378 INFO L226 Difference]: Without dead ends: 199 [2020-09-15 01:09:03,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:09:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-15 01:09:03,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-15 01:09:03,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:03,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:03,382 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:03,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:03,382 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:03,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:03,382 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:03,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:03,385 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:03,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:03,592 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 150 times [2020-09-15 01:09:03,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:03,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717585028] [2020-09-15 01:09:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:03,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717585028] [2020-09-15 01:09:03,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585145407] [2020-09-15 01:09:03,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:03,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:03,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-15 01:09:03,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:03,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:03,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-15 01:09:03,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815963571] [2020-09-15 01:09:03,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-15 01:09:03,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-15 01:09:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-09-15 01:09:03,853 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 11 states. [2020-09-15 01:09:04,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:04,172 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-15 01:09:04,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:09:04,173 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-15 01:09:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:04,174 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:09:04,174 INFO L226 Difference]: Without dead ends: 221 [2020-09-15 01:09:04,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2020-09-15 01:09:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-15 01:09:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-15 01:09:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-15 01:09:04,178 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-15 01:09:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:04,178 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-15 01:09:04,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-15 01:09:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-15 01:09:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:04,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:04,179 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:04,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2020-09-15 01:09:04,379 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:04,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 151 times [2020-09-15 01:09:04,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:04,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234679445] [2020-09-15 01:09:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:04,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234679445] [2020-09-15 01:09:04,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704863120] [2020-09-15 01:09:04,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:04,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:04,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:04,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:04,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:04,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:04,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949376226] [2020-09-15 01:09:04,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:04,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:04,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:04,814 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-15 01:09:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:05,369 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-15 01:09:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:09:05,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:05,371 INFO L225 Difference]: With dead ends: 218 [2020-09-15 01:09:05,371 INFO L226 Difference]: Without dead ends: 216 [2020-09-15 01:09:05,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:05,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-15 01:09:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-15 01:09:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:05,375 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:05,375 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:05,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:05,382 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:05,382 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:05,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:05,582 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:05,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 152 times [2020-09-15 01:09:05,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:05,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160136847] [2020-09-15 01:09:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:05,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160136847] [2020-09-15 01:09:05,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105928087] [2020-09-15 01:09:05,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:05,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:09:05,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:05,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:06,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:06,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:06,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815262255] [2020-09-15 01:09:06,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:06,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:06,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:06,052 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:06,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:06,910 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-15 01:09:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:09:06,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:06,912 INFO L225 Difference]: With dead ends: 248 [2020-09-15 01:09:06,912 INFO L226 Difference]: Without dead ends: 243 [2020-09-15 01:09:06,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:09:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-15 01:09:06,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-15 01:09:06,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:06,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:06,916 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:06,916 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:06,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:06,916 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:06,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:06,917 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:07,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:07,118 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:07,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:07,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 153 times [2020-09-15 01:09:07,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:07,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757484429] [2020-09-15 01:09:07,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:07,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757484429] [2020-09-15 01:09:07,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547224754] [2020-09-15 01:09:07,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:07,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-15 01:09:07,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:07,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:07,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-09-15 01:09:07,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307384222] [2020-09-15 01:09:07,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-15 01:09:07,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:07,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-15 01:09:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-09-15 01:09:07,444 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 13 states. [2020-09-15 01:09:07,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:07,884 INFO L93 Difference]: Finished difference Result 246 states and 583 transitions. [2020-09-15 01:09:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:07,885 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-09-15 01:09:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:07,886 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:09:07,886 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:09:07,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:09:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:09:07,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 162. [2020-09-15 01:09:07,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-15 01:09:07,889 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-15 01:09:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:07,890 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-15 01:09:07,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-15 01:09:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-15 01:09:07,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:07,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:07,890 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:08,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:08,091 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:08,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 154 times [2020-09-15 01:09:08,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:08,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277402574] [2020-09-15 01:09:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277402574] [2020-09-15 01:09:08,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75279435] [2020-09-15 01:09:08,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:08,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:08,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:08,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:08,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:08,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:08,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:08,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253841147] [2020-09-15 01:09:08,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:08,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:08,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:08,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:08,584 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-15 01:09:09,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:09,308 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-15 01:09:09,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:09:09,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:09,310 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:09:09,310 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:09:09,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:09:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-15 01:09:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-15 01:09:09,314 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-15 01:09:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:09,314 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-15 01:09:09,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-15 01:09:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:09,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:09,315 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:09,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:09,516 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:09,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 155 times [2020-09-15 01:09:09,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:09,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335167366] [2020-09-15 01:09:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:09,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335167366] [2020-09-15 01:09:09,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758410142] [2020-09-15 01:09:09,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:09,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:09,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:09,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:10,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:10,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:10,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499381152] [2020-09-15 01:09:10,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:10,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:10,030 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-15 01:09:10,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:10,852 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-15 01:09:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:09:10,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:10,853 INFO L225 Difference]: With dead ends: 252 [2020-09-15 01:09:10,853 INFO L226 Difference]: Without dead ends: 250 [2020-09-15 01:09:10,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:09:10,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-15 01:09:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-15 01:09:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:09:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-15 01:09:10,856 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-15 01:09:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:10,856 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-15 01:09:10,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-15 01:09:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:10,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:10,857 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:11,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-15 01:09:11,058 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 156 times [2020-09-15 01:09:11,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:11,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911438650] [2020-09-15 01:09:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:11,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911438650] [2020-09-15 01:09:11,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812378887] [2020-09-15 01:09:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:11,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:11,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:11,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:11,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:11,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:11,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421608251] [2020-09-15 01:09:11,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:11,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:11,533 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-15 01:09:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:12,572 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-15 01:09:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:09:12,573 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:12,574 INFO L225 Difference]: With dead ends: 258 [2020-09-15 01:09:12,574 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:09:12,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:09:12,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:09:12,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-15 01:09:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:09:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:09:12,578 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:09:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:12,578 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:09:12,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:09:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:12,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:12,579 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:12,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-15 01:09:12,779 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:12,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 157 times [2020-09-15 01:09:12,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:12,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196547871] [2020-09-15 01:09:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196547871] [2020-09-15 01:09:12,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987791408] [2020-09-15 01:09:12,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:12,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:12,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:15,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:15,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:15,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:15,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718424876] [2020-09-15 01:09:15,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:15,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:15,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:15,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:09:15,314 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:09:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:24,796 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-15 01:09:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:09:24,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:24,798 INFO L225 Difference]: With dead ends: 287 [2020-09-15 01:09:24,798 INFO L226 Difference]: Without dead ends: 279 [2020-09-15 01:09:24,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=383, Invalid=873, Unknown=4, NotChecked=0, Total=1260 [2020-09-15 01:09:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-15 01:09:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-15 01:09:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-15 01:09:24,802 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-15 01:09:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:24,802 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-15 01:09:24,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-15 01:09:24,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:24,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:24,803 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:25,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-15 01:09:25,013 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:25,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 158 times [2020-09-15 01:09:25,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:25,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059938646] [2020-09-15 01:09:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:25,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059938646] [2020-09-15 01:09:25,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641473653] [2020-09-15 01:09:25,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:25,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:09:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:25,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:25,445 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:09:25,447 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:09:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:25,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:25,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:25,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143833658] [2020-09-15 01:09:25,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:25,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:25,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:25,494 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-15 01:09:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:26,472 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-15 01:09:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:09:26,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:26,474 INFO L225 Difference]: With dead ends: 260 [2020-09-15 01:09:26,474 INFO L226 Difference]: Without dead ends: 255 [2020-09-15 01:09:26,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:09:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-15 01:09:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-15 01:09:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:09:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-15 01:09:26,478 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-15 01:09:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:26,478 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-15 01:09:26,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-15 01:09:26,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:26,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:26,479 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:26,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:26,682 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:26,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 159 times [2020-09-15 01:09:26,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:26,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076476135] [2020-09-15 01:09:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:26,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076476135] [2020-09-15 01:09:26,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92062502] [2020-09-15 01:09:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:26,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:09:26,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:26,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:26,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:29,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:29,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:29,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136554127] [2020-09-15 01:09:29,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:29,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:29,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:29,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:29,760 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-15 01:09:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:30,380 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-15 01:09:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:30,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:30,383 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:09:30,383 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:09:30,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:09:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-15 01:09:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:30,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-15 01:09:30,386 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-15 01:09:30,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:30,387 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-15 01:09:30,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:30,387 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-15 01:09:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:30,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:30,387 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:30,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:30,588 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 160 times [2020-09-15 01:09:30,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:30,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578061014] [2020-09-15 01:09:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:30,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578061014] [2020-09-15 01:09:30,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116731646] [2020-09-15 01:09:30,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:30,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:09:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:34,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:34,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:34,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13906851] [2020-09-15 01:09:34,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:34,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:34,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:34,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:09:34,768 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-15 01:09:39,202 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:09:47,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:47,729 INFO L93 Difference]: Finished difference Result 242 states and 557 transitions. [2020-09-15 01:09:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:47,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:47,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:47,731 INFO L225 Difference]: With dead ends: 242 [2020-09-15 01:09:47,731 INFO L226 Difference]: Without dead ends: 240 [2020-09-15 01:09:47,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=203, Invalid=552, Unknown=1, NotChecked=0, Total=756 [2020-09-15 01:09:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-15 01:09:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 163. [2020-09-15 01:09:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:09:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-15 01:09:47,743 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-15 01:09:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:47,744 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-15 01:09:47,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-15 01:09:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:47,744 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:47,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-15 01:09:47,945 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:47,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:47,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 161 times [2020-09-15 01:09:47,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:47,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937926065] [2020-09-15 01:09:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:48,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937926065] [2020-09-15 01:09:48,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060961617] [2020-09-15 01:09:48,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:48,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:09:48,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:48,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:48,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:48,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:48,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:48,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477771840] [2020-09-15 01:09:48,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:48,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:48,508 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-15 01:09:49,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:49,387 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-15 01:09:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:09:49,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:49,390 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:09:49,390 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:09:49,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:09:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:09:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-15 01:09:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:09:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-15 01:09:49,394 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-15 01:09:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:49,394 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-15 01:09:49,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-15 01:09:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:49,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:49,394 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:49,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:49,600 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 162 times [2020-09-15 01:09:49,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:49,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394511138] [2020-09-15 01:09:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:49,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394511138] [2020-09-15 01:09:49,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728771323] [2020-09-15 01:09:49,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:49,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:09:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:09:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:49,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:51,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:51,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:51,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664326990] [2020-09-15 01:09:51,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:51,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:51,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:51,165 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-15 01:09:52,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:09:52,169 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-15 01:09:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:09:52,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:09:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:09:52,170 INFO L225 Difference]: With dead ends: 254 [2020-09-15 01:09:52,170 INFO L226 Difference]: Without dead ends: 252 [2020-09-15 01:09:52,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:09:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-15 01:09:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-15 01:09:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:09:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-15 01:09:52,174 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-15 01:09:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:09:52,174 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-15 01:09:52,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:09:52,174 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-15 01:09:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:09:52,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:09:52,175 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:09:52,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:52,376 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:09:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:09:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 163 times [2020-09-15 01:09:52,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:09:52,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107516640] [2020-09-15 01:09:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:09:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:52,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:52,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107516640] [2020-09-15 01:09:52,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891977941] [2020-09-15 01:09:52,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:09:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:09:52,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:09:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:09:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:09:53,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:09:53,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:09:53,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622827767] [2020-09-15 01:09:53,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:09:53,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:09:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:09:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:09:53,789 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-15 01:09:58,336 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:10:13,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:13,245 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-15 01:10:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:10:13,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:13,247 INFO L225 Difference]: With dead ends: 264 [2020-09-15 01:10:13,247 INFO L226 Difference]: Without dead ends: 262 [2020-09-15 01:10:13,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=302, Invalid=750, Unknown=4, NotChecked=0, Total=1056 [2020-09-15 01:10:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-15 01:10:13,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-15 01:10:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:10:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-15 01:10:13,251 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-15 01:10:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:13,251 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-15 01:10:13,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-15 01:10:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:13,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:13,252 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:13,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:13,452 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 164 times [2020-09-15 01:10:13,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:13,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160096950] [2020-09-15 01:10:13,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:13,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160096950] [2020-09-15 01:10:13,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979745974] [2020-09-15 01:10:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:13,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:13,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:13,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:13,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:15,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:15,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:15,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065104858] [2020-09-15 01:10:15,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:15,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:15,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:15,132 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-15 01:10:16,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:16,142 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-15 01:10:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:10:16,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:16,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:16,144 INFO L225 Difference]: With dead ends: 255 [2020-09-15 01:10:16,144 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:10:16,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:10:16,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:10:16,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-15 01:10:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:16,148 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:16,149 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:16,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:16,149 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:16,149 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:16,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:16,350 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:16,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:16,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 165 times [2020-09-15 01:10:16,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:16,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449374859] [2020-09-15 01:10:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:16,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449374859] [2020-09-15 01:10:16,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46896412] [2020-09-15 01:10:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:16,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:10:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:16,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:16,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:16,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:16,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:16,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:16,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594764598] [2020-09-15 01:10:16,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:16,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:16,874 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:18,187 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-15 01:10:18,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:10:18,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:18,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:18,189 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:10:18,189 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:10:18,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=903, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:10:18,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:10:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-15 01:10:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:18,193 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:18,193 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:18,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:18,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:18,194 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:18,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:18,395 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 166 times [2020-09-15 01:10:18,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:18,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983932803] [2020-09-15 01:10:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:18,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983932803] [2020-09-15 01:10:18,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644538715] [2020-09-15 01:10:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:18,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:10:18,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:18,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,950 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,952 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:18,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:19,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:19,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:19,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318553370] [2020-09-15 01:10:19,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:19,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:19,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:10:19,056 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:20,721 INFO L93 Difference]: Finished difference Result 279 states and 667 transitions. [2020-09-15 01:10:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:10:20,723 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:20,723 INFO L225 Difference]: With dead ends: 279 [2020-09-15 01:10:20,723 INFO L226 Difference]: Without dead ends: 274 [2020-09-15 01:10:20,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=429, Invalid=977, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:10:20,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-15 01:10:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 165. [2020-09-15 01:10:20,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:10:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-15 01:10:20,727 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-15 01:10:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:20,728 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-15 01:10:20,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-15 01:10:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:20,728 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:20,728 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:20,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-15 01:10:20,929 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 167 times [2020-09-15 01:10:20,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:20,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938033250] [2020-09-15 01:10:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:21,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938033250] [2020-09-15 01:10:21,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866486312] [2020-09-15 01:10:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:21,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:10:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:23,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:23,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:23,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955538378] [2020-09-15 01:10:23,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:23,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:23,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:23,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=198, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:10:23,626 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-15 01:10:28,094 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:10:32,385 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:10:33,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:33,114 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-15 01:10:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:10:33,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:33,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:33,117 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:10:33,117 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:10:33,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=362, Invalid=897, Unknown=1, NotChecked=0, Total=1260 [2020-09-15 01:10:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:10:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-15 01:10:33,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:10:33,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:10:33,121 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:10:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:33,121 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:10:33,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:10:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:33,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:33,121 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:33,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-15 01:10:33,322 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:33,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 168 times [2020-09-15 01:10:33,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:33,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746926113] [2020-09-15 01:10:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746926113] [2020-09-15 01:10:33,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436057235] [2020-09-15 01:10:33,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:33,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:10:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:10:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:33,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:10:36,959 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-09-15 01:10:36,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:10:36,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:10:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:37,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:10:37,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:10:37,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903864041] [2020-09-15 01:10:37,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:10:37,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:10:37,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:10:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=185, Unknown=2, NotChecked=0, Total=272 [2020-09-15 01:10:37,042 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:10:41,504 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-15 01:10:45,879 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-15 01:10:50,571 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-09-15 01:10:54,052 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2020-09-15 01:10:57,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:10:57,575 INFO L93 Difference]: Finished difference Result 299 states and 714 transitions. [2020-09-15 01:10:57,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:10:57,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:10:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:10:57,577 INFO L225 Difference]: With dead ends: 299 [2020-09-15 01:10:57,577 INFO L226 Difference]: Without dead ends: 291 [2020-09-15 01:10:57,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=452, Invalid=1025, Unknown=5, NotChecked=0, Total=1482 [2020-09-15 01:10:57,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-15 01:10:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 168. [2020-09-15 01:10:57,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:10:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-15 01:10:57,581 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-15 01:10:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:10:57,581 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-15 01:10:57,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:10:57,581 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-15 01:10:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:10:57,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:10:57,582 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:10:57,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-15 01:10:57,791 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:10:57,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:10:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 169 times [2020-09-15 01:10:57,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:10:57,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332004124] [2020-09-15 01:10:57,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:10:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:10:57,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332004124] [2020-09-15 01:10:57,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194549330] [2020-09-15 01:10:57,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:10:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:10:58,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:10:58,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:00,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:00,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:00,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:00,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596069061] [2020-09-15 01:11:00,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:00,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:00,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:00,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=192, Unknown=1, NotChecked=0, Total=272 [2020-09-15 01:11:00,353 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-15 01:11:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:02,332 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-15 01:11:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:02,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:02,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:02,334 INFO L225 Difference]: With dead ends: 292 [2020-09-15 01:11:02,334 INFO L226 Difference]: Without dead ends: 284 [2020-09-15 01:11:02,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=441, Invalid=1040, Unknown=1, NotChecked=0, Total=1482 [2020-09-15 01:11:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-15 01:11:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-15 01:11:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:11:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-15 01:11:02,337 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-15 01:11:02,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:02,338 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-15 01:11:02,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:02,338 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-15 01:11:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:02,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:02,338 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:02,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-15 01:11:02,539 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:02,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 170 times [2020-09-15 01:11:02,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:02,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760081428] [2020-09-15 01:11:02,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:02,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760081428] [2020-09-15 01:11:02,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698492141] [2020-09-15 01:11:02,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:02,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:02,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:02,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:03,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:03,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:03,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566128649] [2020-09-15 01:11:03,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:03,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:03,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:03,112 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-15 01:11:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:03,803 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-15 01:11:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:11:03,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:03,805 INFO L225 Difference]: With dead ends: 231 [2020-09-15 01:11:03,805 INFO L226 Difference]: Without dead ends: 229 [2020-09-15 01:11:03,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-15 01:11:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-15 01:11:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:11:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-15 01:11:03,808 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-15 01:11:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:03,808 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-15 01:11:03,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-15 01:11:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:03,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:03,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:04,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-15 01:11:04,010 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:04,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 171 times [2020-09-15 01:11:04,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:04,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296370423] [2020-09-15 01:11:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:04,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:04,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296370423] [2020-09-15 01:11:04,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913188397] [2020-09-15 01:11:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:04,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:04,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:11:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:04,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:04,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:04,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001429500] [2020-09-15 01:11:04,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:04,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:04,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:04,558 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-15 01:11:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:05,663 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-15 01:11:05,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:11:05,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:05,670 INFO L225 Difference]: With dead ends: 250 [2020-09-15 01:11:05,671 INFO L226 Difference]: Without dead ends: 248 [2020-09-15 01:11:05,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:11:05,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-15 01:11:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-15 01:11:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-15 01:11:05,673 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-15 01:11:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:05,674 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-15 01:11:05,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:05,674 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-15 01:11:05,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:05,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:05,674 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:05,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:05,875 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:05,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:05,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 172 times [2020-09-15 01:11:05,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:05,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316552517] [2020-09-15 01:11:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:06,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316552517] [2020-09-15 01:11:06,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653460319] [2020-09-15 01:11:06,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:06,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:06,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:06,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:06,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:06,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:06,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:06,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:06,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970769160] [2020-09-15 01:11:06,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:06,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:06,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:06,403 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-15 01:11:08,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:08,093 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-15 01:11:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:08,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:08,095 INFO L225 Difference]: With dead ends: 288 [2020-09-15 01:11:08,095 INFO L226 Difference]: Without dead ends: 283 [2020-09-15 01:11:08,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:11:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-15 01:11:08,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-15 01:11:08,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:11:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-15 01:11:08,099 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-15 01:11:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:08,099 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-15 01:11:08,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-15 01:11:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:08,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:08,100 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:08,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-15 01:11:08,300 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:08,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:08,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 173 times [2020-09-15 01:11:08,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:08,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104536438] [2020-09-15 01:11:08,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:08,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104536438] [2020-09-15 01:11:08,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692198000] [2020-09-15 01:11:08,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:08,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:11:08,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:08,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:08,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:08,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:08,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555060684] [2020-09-15 01:11:08,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:08,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:08,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:08,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:08,780 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-15 01:11:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:09,439 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-15 01:11:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:09,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:09,441 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:11:09,441 INFO L226 Difference]: Without dead ends: 234 [2020-09-15 01:11:09,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:11:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-15 01:11:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-15 01:11:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:09,444 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:09,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:09,444 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:09,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:09,444 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:09,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:09,445 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:09,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-15 01:11:09,646 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:09,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 174 times [2020-09-15 01:11:09,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:09,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774538725] [2020-09-15 01:11:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774538725] [2020-09-15 01:11:09,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932324181] [2020-09-15 01:11:09,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:09,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:11:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:10,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:10,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:10,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:10,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523025795] [2020-09-15 01:11:10,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:10,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:10,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:10,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:10,151 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:10,837 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-15 01:11:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:11:10,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:10,839 INFO L225 Difference]: With dead ends: 246 [2020-09-15 01:11:10,839 INFO L226 Difference]: Without dead ends: 244 [2020-09-15 01:11:10,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:11:10,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-15 01:11:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-15 01:11:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:10,842 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:10,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:10,843 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:10,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:10,843 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:10,843 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:10,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:11,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:11,044 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 175 times [2020-09-15 01:11:11,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:11,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405060620] [2020-09-15 01:11:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:11,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405060620] [2020-09-15 01:11:11,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55993966] [2020-09-15 01:11:11,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:11,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:11,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:11,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:11,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334087910] [2020-09-15 01:11:11,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:11,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:11,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:11,515 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:12,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:12,126 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-15 01:11:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:11:12,128 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:12,129 INFO L225 Difference]: With dead ends: 239 [2020-09-15 01:11:12,129 INFO L226 Difference]: Without dead ends: 237 [2020-09-15 01:11:12,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:11:12,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-15 01:11:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-15 01:11:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:11:12,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-15 01:11:12,132 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-15 01:11:12,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:12,132 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-15 01:11:12,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:12,133 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-15 01:11:12,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:12,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:12,133 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:12,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:12,334 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:12,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 176 times [2020-09-15 01:11:12,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:12,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94001883] [2020-09-15 01:11:12,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:12,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94001883] [2020-09-15 01:11:12,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133123667] [2020-09-15 01:11:12,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:12,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:12,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:12,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:12,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:12,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:12,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266239709] [2020-09-15 01:11:12,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:12,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:12,811 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-15 01:11:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:13,353 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-15 01:11:13,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:11:13,354 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:13,355 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:11:13,355 INFO L226 Difference]: Without dead ends: 227 [2020-09-15 01:11:13,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:11:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-15 01:11:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-15 01:11:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:11:13,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-15 01:11:13,359 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-15 01:11:13,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:13,359 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-15 01:11:13,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:13,359 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-15 01:11:13,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:13,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:13,360 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:13,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:13,561 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:13,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 177 times [2020-09-15 01:11:13,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:13,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414817704] [2020-09-15 01:11:13,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:13,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414817704] [2020-09-15 01:11:13,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669947417] [2020-09-15 01:11:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:13,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:13,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:13,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:13,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:14,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:14,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:14,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869376732] [2020-09-15 01:11:14,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:14,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:14,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:14,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:14,050 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-15 01:11:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:15,086 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-15 01:11:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:15,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:15,088 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:11:15,088 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:11:15,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=364, Invalid=968, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:11:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:11:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-15 01:11:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:11:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-15 01:11:15,092 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-15 01:11:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:15,092 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-15 01:11:15,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-15 01:11:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:15,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:15,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:15,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:15,294 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 178 times [2020-09-15 01:11:15,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:15,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632081890] [2020-09-15 01:11:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632081890] [2020-09-15 01:11:15,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328806488] [2020-09-15 01:11:15,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:15,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:15,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:15,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:15,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:15,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:15,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:15,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797685124] [2020-09-15 01:11:15,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:15,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:15,793 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-15 01:11:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:16,819 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-15 01:11:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:11:16,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:16,821 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:11:16,821 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:11:16,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=307, Invalid=815, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:11:16,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:11:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-15 01:11:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:11:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-15 01:11:16,826 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-15 01:11:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:16,826 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-15 01:11:16,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-15 01:11:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:16,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:16,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:17,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-15 01:11:17,027 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 179 times [2020-09-15 01:11:17,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:17,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248312428] [2020-09-15 01:11:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:17,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248312428] [2020-09-15 01:11:17,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183526423] [2020-09-15 01:11:17,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:17,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:11:17,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:17,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:17,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:17,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:17,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279389371] [2020-09-15 01:11:17,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:17,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:17,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:17,475 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-15 01:11:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:18,335 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-15 01:11:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:11:18,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:18,337 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:11:18,337 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:11:18,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:11:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:11:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-15 01:11:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:11:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-15 01:11:18,341 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-15 01:11:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:18,341 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-15 01:11:18,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-15 01:11:18,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:18,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:18,342 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:18,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-15 01:11:18,552 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 180 times [2020-09-15 01:11:18,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:18,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684520492] [2020-09-15 01:11:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684520492] [2020-09-15 01:11:18,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890742747] [2020-09-15 01:11:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:18,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:11:18,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:18,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:19,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:19,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:19,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794364081] [2020-09-15 01:11:19,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:19,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:19,030 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-15 01:11:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:20,159 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-15 01:11:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:20,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:20,167 INFO L225 Difference]: With dead ends: 268 [2020-09-15 01:11:20,168 INFO L226 Difference]: Without dead ends: 266 [2020-09-15 01:11:20,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=996, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:11:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-15 01:11:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-15 01:11:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:11:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:11:20,171 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:11:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:20,171 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:11:20,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:11:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:20,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:20,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:20,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-15 01:11:20,372 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:20,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 181 times [2020-09-15 01:11:20,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:20,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415986406] [2020-09-15 01:11:20,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415986406] [2020-09-15 01:11:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860120194] [2020-09-15 01:11:20,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:20,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:20,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:20,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152350373] [2020-09-15 01:11:20,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:20,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:20,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:20,856 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:11:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:22,024 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-15 01:11:22,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-15 01:11:22,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:22,027 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:11:22,027 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:11:22,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:11:22,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:11:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-15 01:11:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:11:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-15 01:11:22,031 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-15 01:11:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:22,031 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-15 01:11:22,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-15 01:11:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:22,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:22,032 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:22,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2020-09-15 01:11:22,233 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:22,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:22,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 182 times [2020-09-15 01:11:22,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:22,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779758671] [2020-09-15 01:11:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:22,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779758671] [2020-09-15 01:11:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886582401] [2020-09-15 01:11:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:22,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:22,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:22,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:22,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248732022] [2020-09-15 01:11:22,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:22,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:22,708 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-15 01:11:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:23,865 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-15 01:11:23,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:11:23,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:23,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:23,868 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:11:23,868 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:11:23,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=428, Invalid=978, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:11:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:11:23,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-15 01:11:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:11:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:11:23,872 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:11:23,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:23,872 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:11:23,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:11:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:23,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:23,873 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:24,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-15 01:11:24,081 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:24,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:24,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 183 times [2020-09-15 01:11:24,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:24,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371393903] [2020-09-15 01:11:24,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:24,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371393903] [2020-09-15 01:11:24,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368339764] [2020-09-15 01:11:24,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:24,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:24,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:24,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:24,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:24,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:24,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508641364] [2020-09-15 01:11:24,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:24,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:24,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:24,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:24,551 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:11:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:25,653 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-15 01:11:25,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:11:25,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:25,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:25,656 INFO L225 Difference]: With dead ends: 248 [2020-09-15 01:11:25,656 INFO L226 Difference]: Without dead ends: 243 [2020-09-15 01:11:25,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:11:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-15 01:11:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-15 01:11:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:11:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:11:25,660 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:11:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:25,660 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:11:25,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:11:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:25,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:25,661 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:25,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:25,861 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:25,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 184 times [2020-09-15 01:11:25,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:25,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854856048] [2020-09-15 01:11:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:26,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854856048] [2020-09-15 01:11:26,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775252870] [2020-09-15 01:11:26,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:26,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:26,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:26,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:26,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:26,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:26,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:26,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:26,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476318375] [2020-09-15 01:11:26,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:26,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:26,372 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:11:27,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:27,875 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-15 01:11:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:11:27,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:27,877 INFO L225 Difference]: With dead ends: 287 [2020-09-15 01:11:27,877 INFO L226 Difference]: Without dead ends: 282 [2020-09-15 01:11:27,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:11:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-15 01:11:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-15 01:11:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:11:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-15 01:11:27,881 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-15 01:11:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:27,881 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-15 01:11:27,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-15 01:11:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:27,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:27,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:28,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-15 01:11:28,083 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 185 times [2020-09-15 01:11:28,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:28,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822052609] [2020-09-15 01:11:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:28,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822052609] [2020-09-15 01:11:28,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11140606] [2020-09-15 01:11:28,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:28,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:28,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:28,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:28,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:28,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:28,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957535347] [2020-09-15 01:11:28,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:28,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:28,575 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-15 01:11:29,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:29,937 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-15 01:11:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:11:29,938 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:29,939 INFO L225 Difference]: With dead ends: 284 [2020-09-15 01:11:29,939 INFO L226 Difference]: Without dead ends: 282 [2020-09-15 01:11:29,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:11:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-15 01:11:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-15 01:11:29,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:11:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-15 01:11:29,944 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-15 01:11:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:29,944 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-15 01:11:29,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-15 01:11:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:29,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:29,944 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:30,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:30,145 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:30,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:30,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 186 times [2020-09-15 01:11:30,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:30,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986838501] [2020-09-15 01:11:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:30,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986838501] [2020-09-15 01:11:30,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509220798] [2020-09-15 01:11:30,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:30,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:11:30,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:30,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:30,747 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:30,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:30,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:30,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771169309] [2020-09-15 01:11:30,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:30,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:30,829 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-15 01:11:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:32,401 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-15 01:11:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:11:32,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:32,402 INFO L225 Difference]: With dead ends: 289 [2020-09-15 01:11:32,403 INFO L226 Difference]: Without dead ends: 284 [2020-09-15 01:11:32,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:11:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-15 01:11:32,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-15 01:11:32,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-15 01:11:32,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-15 01:11:32,407 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-15 01:11:32,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:32,407 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-15 01:11:32,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:32,407 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-15 01:11:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:32,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:32,407 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:32,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:32,608 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:32,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:32,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 187 times [2020-09-15 01:11:32,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:32,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852599933] [2020-09-15 01:11:32,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:32,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852599933] [2020-09-15 01:11:32,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060158062] [2020-09-15 01:11:32,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:32,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:32,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:33,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:33,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:33,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:33,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412584130] [2020-09-15 01:11:33,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:33,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:33,086 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-15 01:11:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:34,942 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-15 01:11:34,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:11:34,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:34,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:34,944 INFO L225 Difference]: With dead ends: 312 [2020-09-15 01:11:34,944 INFO L226 Difference]: Without dead ends: 304 [2020-09-15 01:11:34,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=559, Invalid=1421, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:11:34,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-15 01:11:34,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-15 01:11:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:11:34,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-15 01:11:34,948 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-15 01:11:34,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:34,949 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-15 01:11:34,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:34,949 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-15 01:11:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:34,949 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:34,949 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:35,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:35,150 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 188 times [2020-09-15 01:11:35,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:35,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105158019] [2020-09-15 01:11:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:35,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105158019] [2020-09-15 01:11:35,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232450854] [2020-09-15 01:11:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:35,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:35,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:35,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:35,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:35,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:35,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119157076] [2020-09-15 01:11:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:35,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:35,636 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-15 01:11:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:36,707 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-15 01:11:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:11:36,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:36,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:36,710 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:11:36,710 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:11:36,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=326, Invalid=864, Unknown=0, NotChecked=0, Total=1190 [2020-09-15 01:11:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:11:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-15 01:11:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:11:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:11:36,714 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:11:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:36,714 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:11:36,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:11:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:36,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:36,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:36,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-15 01:11:36,916 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:36,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:36,916 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 189 times [2020-09-15 01:11:36,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:36,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090249020] [2020-09-15 01:11:36,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:37,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090249020] [2020-09-15 01:11:37,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946640147] [2020-09-15 01:11:37,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:37,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:37,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:37,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:37,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:37,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716330264] [2020-09-15 01:11:37,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:37,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:37,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:37,388 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:11:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:38,659 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-15 01:11:38,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:38,660 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:38,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:38,660 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:11:38,661 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:11:38,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:11:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:11:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-15 01:11:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:11:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:11:38,665 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:11:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:38,665 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:11:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:11:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:38,666 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:38,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-15 01:11:38,880 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 190 times [2020-09-15 01:11:38,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:38,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927264983] [2020-09-15 01:11:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:39,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927264983] [2020-09-15 01:11:39,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812913668] [2020-09-15 01:11:39,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:39,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:39,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:39,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:39,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:39,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:39,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:39,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474587359] [2020-09-15 01:11:39,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:39,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:39,346 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:11:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:40,860 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-15 01:11:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:11:40,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:40,862 INFO L225 Difference]: With dead ends: 296 [2020-09-15 01:11:40,862 INFO L226 Difference]: Without dead ends: 288 [2020-09-15 01:11:40,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:11:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-15 01:11:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-15 01:11:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:11:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-15 01:11:40,866 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-15 01:11:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:40,866 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-15 01:11:40,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-15 01:11:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:40,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:40,867 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:41,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-15 01:11:41,068 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:41,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:41,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 191 times [2020-09-15 01:11:41,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:41,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368657268] [2020-09-15 01:11:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:41,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368657268] [2020-09-15 01:11:41,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664334327] [2020-09-15 01:11:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:41,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:11:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:41,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:41,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:41,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:41,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034402531] [2020-09-15 01:11:41,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:41,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:41,540 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-15 01:11:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:42,994 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-15 01:11:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:11:42,996 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:42,997 INFO L225 Difference]: With dead ends: 298 [2020-09-15 01:11:42,997 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 01:11:42,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=500, Invalid=1222, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:11:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 01:11:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-15 01:11:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:11:43,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-15 01:11:43,001 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-15 01:11:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:43,001 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-15 01:11:43,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:43,002 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-15 01:11:43,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:43,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:43,002 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:43,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-15 01:11:43,203 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:43,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 192 times [2020-09-15 01:11:43,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:43,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037648961] [2020-09-15 01:11:43,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:43,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037648961] [2020-09-15 01:11:43,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992178765] [2020-09-15 01:11:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:43,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:11:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:43,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:43,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:11:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:43,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:43,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:43,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549731651] [2020-09-15 01:11:43,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:43,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:43,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:43,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:43,681 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-15 01:11:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:45,444 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-15 01:11:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:11:45,447 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:45,448 INFO L225 Difference]: With dead ends: 291 [2020-09-15 01:11:45,448 INFO L226 Difference]: Without dead ends: 283 [2020-09-15 01:11:45,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=498, Invalid=1224, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:11:45,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-15 01:11:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-15 01:11:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:11:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:11:45,452 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:11:45,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:45,452 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:11:45,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:11:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:45,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:45,453 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:45,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-15 01:11:45,654 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:45,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:45,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 193 times [2020-09-15 01:11:45,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:45,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972904818] [2020-09-15 01:11:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:45,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972904818] [2020-09-15 01:11:45,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371645498] [2020-09-15 01:11:45,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:45,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:46,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:46,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:46,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205922553] [2020-09-15 01:11:46,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:46,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:46,280 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:11:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:47,708 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-15 01:11:47,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:11:47,710 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:47,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:47,711 INFO L225 Difference]: With dead ends: 265 [2020-09-15 01:11:47,711 INFO L226 Difference]: Without dead ends: 263 [2020-09-15 01:11:47,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:11:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-15 01:11:47,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-15 01:11:47,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:11:47,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:11:47,715 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:11:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:47,715 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:11:47,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:11:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:47,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:47,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:47,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:47,916 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:47,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 194 times [2020-09-15 01:11:47,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:47,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133591740] [2020-09-15 01:11:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:48,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133591740] [2020-09-15 01:11:48,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707181008] [2020-09-15 01:11:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:48,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:11:48,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:48,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:48,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:48,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:48,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454150138] [2020-09-15 01:11:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:48,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:48,480 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-15 01:11:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:50,146 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-15 01:11:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:11:50,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:50,148 INFO L225 Difference]: With dead ends: 262 [2020-09-15 01:11:50,149 INFO L226 Difference]: Without dead ends: 260 [2020-09-15 01:11:50,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:11:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-15 01:11:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-15 01:11:50,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:11:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:11:50,157 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:11:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:50,157 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:11:50,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:11:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:50,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:50,158 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:50,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-15 01:11:50,359 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:50,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 195 times [2020-09-15 01:11:50,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:50,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229063384] [2020-09-15 01:11:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:50,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:50,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229063384] [2020-09-15 01:11:50,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814821583] [2020-09-15 01:11:50,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:50,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:11:50,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:50,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:11:50,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:50,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:11:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:50,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:11:50,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:11:50,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048237433] [2020-09-15 01:11:50,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:11:50,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:11:50,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:11:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:11:50,905 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:11:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:11:52,989 INFO L93 Difference]: Finished difference Result 282 states and 683 transitions. [2020-09-15 01:11:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:11:52,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:11:52,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:11:52,992 INFO L225 Difference]: With dead ends: 282 [2020-09-15 01:11:52,992 INFO L226 Difference]: Without dead ends: 277 [2020-09-15 01:11:52,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=514, Invalid=1378, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:11:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-15 01:11:52,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 167. [2020-09-15 01:11:52,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:11:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-15 01:11:52,996 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-15 01:11:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:11:52,996 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-15 01:11:52,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:11:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-15 01:11:52,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:11:52,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:11:52,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:11:53,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:53,198 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:11:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:11:53,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 196 times [2020-09-15 01:11:53,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:11:53,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092013292] [2020-09-15 01:11:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:11:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:11:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:11:53,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092013292] [2020-09-15 01:11:53,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554796880] [2020-09-15 01:11:53,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:11:53,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:11:53,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:11:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:11:53,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:11:57,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:12:01,996 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-15 01:12:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:12:01,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:12:01,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:12:01,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474277664] [2020-09-15 01:12:01,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:12:01,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:12:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:12:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=223, Unknown=3, NotChecked=0, Total=306 [2020-09-15 01:12:02,000 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-15 01:12:06,255 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-15 01:12:10,891 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-15 01:12:15,086 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-09-15 01:12:19,507 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-09-15 01:12:21,724 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-15 01:12:30,674 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-15 01:12:33,108 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-15 01:13:05,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:05,946 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-15 01:13:05,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:13:05,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-15 01:13:05,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:05,949 INFO L225 Difference]: With dead ends: 302 [2020-09-15 01:13:05,949 INFO L226 Difference]: Without dead ends: 297 [2020-09-15 01:13:05,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=583, Invalid=1480, Unknown=7, NotChecked=0, Total=2070 [2020-09-15 01:13:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-15 01:13:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-15 01:13:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:13:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-15 01:13:05,953 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-15 01:13:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:05,953 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-15 01:13:05,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:13:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-15 01:13:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:05,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:05,953 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:06,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-15 01:13:06,154 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:06,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 197 times [2020-09-15 01:13:06,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:06,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371393628] [2020-09-15 01:13:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:06,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:06,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371393628] [2020-09-15 01:13:06,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651192164] [2020-09-15 01:13:06,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:06,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:13:06,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:06,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:06,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:06,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:06,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919743291] [2020-09-15 01:13:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:06,674 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-15 01:13:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:07,309 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-15 01:13:07,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:13:07,311 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:07,312 INFO L225 Difference]: With dead ends: 219 [2020-09-15 01:13:07,312 INFO L226 Difference]: Without dead ends: 217 [2020-09-15 01:13:07,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:13:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-15 01:13:07,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-15 01:13:07,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:13:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-15 01:13:07,314 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-15 01:13:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:07,315 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-15 01:13:07,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-15 01:13:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:07,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:07,315 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:07,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:07,516 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 198 times [2020-09-15 01:13:07,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:07,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533150137] [2020-09-15 01:13:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:07,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:07,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533150137] [2020-09-15 01:13:07,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053901929] [2020-09-15 01:13:07,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:07,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:13:07,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:07,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:07,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:07,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:07,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:07,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:07,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565073055] [2020-09-15 01:13:07,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:07,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:07,981 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-15 01:13:08,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:08,790 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-15 01:13:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:13:08,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:08,793 INFO L225 Difference]: With dead ends: 229 [2020-09-15 01:13:08,793 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:13:08,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:13:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:13:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-15 01:13:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-15 01:13:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-15 01:13:08,796 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-15 01:13:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:08,796 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-15 01:13:08,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-15 01:13:08,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:08,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:08,797 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:08,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:08,997 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 199 times [2020-09-15 01:13:08,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:08,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941087807] [2020-09-15 01:13:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:09,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941087807] [2020-09-15 01:13:09,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150915469] [2020-09-15 01:13:09,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:09,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:09,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:09,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107208660] [2020-09-15 01:13:09,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:09,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:09,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:09,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:09,581 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-15 01:13:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:10,426 INFO L93 Difference]: Finished difference Result 227 states and 524 transitions. [2020-09-15 01:13:10,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:13:10,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:10,428 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:13:10,428 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:13:10,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:13:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:13:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-09-15 01:13:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-15 01:13:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-15 01:13:10,432 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-15 01:13:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:10,433 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-15 01:13:10,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-15 01:13:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:10,433 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:10,433 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:10,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-15 01:13:10,634 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 200 times [2020-09-15 01:13:10,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:10,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476538520] [2020-09-15 01:13:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:10,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476538520] [2020-09-15 01:13:10,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65763041] [2020-09-15 01:13:10,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:10,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:11,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:11,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:11,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:11,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010047718] [2020-09-15 01:13:11,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:11,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:11,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:11,233 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-15 01:13:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:12,046 INFO L93 Difference]: Finished difference Result 231 states and 533 transitions. [2020-09-15 01:13:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-15 01:13:12,048 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:12,049 INFO L225 Difference]: With dead ends: 231 [2020-09-15 01:13:12,049 INFO L226 Difference]: Without dead ends: 229 [2020-09-15 01:13:12,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=586, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:13:12,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-15 01:13:12,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2020-09-15 01:13:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:13:12,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-15 01:13:12,052 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-15 01:13:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:12,052 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-15 01:13:12,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:12,052 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-15 01:13:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:12,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:12,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:12,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:12,254 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:12,254 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 201 times [2020-09-15 01:13:12,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:12,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522501381] [2020-09-15 01:13:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:12,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:12,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522501381] [2020-09-15 01:13:12,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781268523] [2020-09-15 01:13:12,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:12,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:13:12,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:12,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:14,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:14,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:14,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746144130] [2020-09-15 01:13:14,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:14,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:14,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:14,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:14,456 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-15 01:13:15,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:15,651 INFO L93 Difference]: Finished difference Result 244 states and 558 transitions. [2020-09-15 01:13:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:15,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:15,654 INFO L225 Difference]: With dead ends: 244 [2020-09-15 01:13:15,654 INFO L226 Difference]: Without dead ends: 242 [2020-09-15 01:13:15,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:15,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-15 01:13:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 164. [2020-09-15 01:13:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:13:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-15 01:13:15,658 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-15 01:13:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:15,658 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-15 01:13:15,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-15 01:13:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:15,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:15,658 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:15,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-15 01:13:15,861 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 202 times [2020-09-15 01:13:15,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:15,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397350875] [2020-09-15 01:13:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:16,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397350875] [2020-09-15 01:13:16,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910770995] [2020-09-15 01:13:16,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:16,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:16,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:16,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:16,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:16,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:16,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561055974] [2020-09-15 01:13:16,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:16,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:16,451 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-15 01:13:17,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:17,181 INFO L93 Difference]: Finished difference Result 236 states and 543 transitions. [2020-09-15 01:13:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:13:17,182 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:17,183 INFO L225 Difference]: With dead ends: 236 [2020-09-15 01:13:17,183 INFO L226 Difference]: Without dead ends: 234 [2020-09-15 01:13:17,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:13:17,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-15 01:13:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-15 01:13:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:13:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-15 01:13:17,187 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-15 01:13:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:17,187 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-15 01:13:17,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-15 01:13:17,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:17,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:17,188 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:17,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-15 01:13:17,388 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 203 times [2020-09-15 01:13:17,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:17,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064489175] [2020-09-15 01:13:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:17,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064489175] [2020-09-15 01:13:17,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371128707] [2020-09-15 01:13:17,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:17,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:13:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:17,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:18,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:18,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42295896] [2020-09-15 01:13:18,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:18,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:18,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:18,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:18,035 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-15 01:13:19,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:19,017 INFO L93 Difference]: Finished difference Result 241 states and 553 transitions. [2020-09-15 01:13:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:13:19,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:19,020 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:13:19,020 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:13:19,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:13:19,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:13:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-15 01:13:19,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:13:19,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-15 01:13:19,023 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-15 01:13:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:19,024 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-15 01:13:19,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-15 01:13:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:19,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:19,024 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:19,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-15 01:13:19,225 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 204 times [2020-09-15 01:13:19,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:19,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982895826] [2020-09-15 01:13:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:19,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982895826] [2020-09-15 01:13:19,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311179236] [2020-09-15 01:13:19,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:19,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:13:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:19,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:19,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:19,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:19,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486170279] [2020-09-15 01:13:19,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:19,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:19,858 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-15 01:13:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:20,639 INFO L93 Difference]: Finished difference Result 226 states and 520 transitions. [2020-09-15 01:13:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:13:20,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:20,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:20,642 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:13:20,642 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:13:20,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:13:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:13:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 156. [2020-09-15 01:13:20,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:13:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-15 01:13:20,645 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-15 01:13:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:20,645 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-15 01:13:20,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:20,645 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-15 01:13:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:20,646 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:20,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-15 01:13:20,847 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:20,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:20,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 205 times [2020-09-15 01:13:20,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:20,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752145454] [2020-09-15 01:13:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:21,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752145454] [2020-09-15 01:13:21,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714431845] [2020-09-15 01:13:21,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:21,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:21,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:21,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:21,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428490442] [2020-09-15 01:13:21,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:21,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:21,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:21,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:21,405 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-15 01:13:22,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:22,796 INFO L93 Difference]: Finished difference Result 253 states and 578 transitions. [2020-09-15 01:13:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:13:22,799 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:22,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:22,800 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:13:22,800 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:13:22,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=447, Invalid=1193, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:13:22,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:13:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 160. [2020-09-15 01:13:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-15 01:13:22,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-15 01:13:22,803 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-15 01:13:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:22,804 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-15 01:13:22,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-15 01:13:22,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:22,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:22,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:23,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-15 01:13:23,005 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 206 times [2020-09-15 01:13:23,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:23,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737311624] [2020-09-15 01:13:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:23,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737311624] [2020-09-15 01:13:23,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663098288] [2020-09-15 01:13:23,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:23,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:23,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:23,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:23,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:23,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:23,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078334742] [2020-09-15 01:13:23,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:23,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:23,600 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-15 01:13:24,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:24,939 INFO L93 Difference]: Finished difference Result 249 states and 570 transitions. [2020-09-15 01:13:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:13:24,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:24,941 INFO L225 Difference]: With dead ends: 249 [2020-09-15 01:13:24,941 INFO L226 Difference]: Without dead ends: 247 [2020-09-15 01:13:24,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=357, Invalid=975, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:13:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-15 01:13:24,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 159. [2020-09-15 01:13:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-15 01:13:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-15 01:13:24,945 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-15 01:13:24,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:24,945 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-15 01:13:24,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:24,945 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-15 01:13:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:24,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:24,945 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:25,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:25,146 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:25,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 207 times [2020-09-15 01:13:25,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:25,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392797521] [2020-09-15 01:13:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:25,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392797521] [2020-09-15 01:13:25,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931184962] [2020-09-15 01:13:25,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:25,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:13:25,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:25,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:25,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:25,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:25,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574634199] [2020-09-15 01:13:25,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:25,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:25,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:25,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:25,860 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-15 01:13:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:27,413 INFO L93 Difference]: Finished difference Result 271 states and 615 transitions. [2020-09-15 01:13:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:13:27,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:27,416 INFO L225 Difference]: With dead ends: 271 [2020-09-15 01:13:27,416 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:13:27,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=1012, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:13:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:13:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 163. [2020-09-15 01:13:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-15 01:13:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-15 01:13:27,420 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-15 01:13:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:27,420 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-15 01:13:27,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-15 01:13:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:27,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:27,421 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:27,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:27,621 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:27,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:27,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 208 times [2020-09-15 01:13:27,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:27,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18137304] [2020-09-15 01:13:27,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:27,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18137304] [2020-09-15 01:13:27,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117117847] [2020-09-15 01:13:27,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:27,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:27,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:28,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:28,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:28,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55281557] [2020-09-15 01:13:28,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:28,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:28,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:28,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:28,222 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-15 01:13:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:29,269 INFO L93 Difference]: Finished difference Result 241 states and 554 transitions. [2020-09-15 01:13:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:13:29,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:29,272 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:13:29,272 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:13:29,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:13:29,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:13:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 162. [2020-09-15 01:13:29,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-15 01:13:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-15 01:13:29,275 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-15 01:13:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:29,276 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-15 01:13:29,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-15 01:13:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:29,276 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:29,276 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:29,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:29,477 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 209 times [2020-09-15 01:13:29,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:29,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551098858] [2020-09-15 01:13:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551098858] [2020-09-15 01:13:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508095695] [2020-09-15 01:13:29,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:29,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:13:29,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:29,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:30,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:30,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:30,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929197429] [2020-09-15 01:13:30,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:30,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:30,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:30,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:30,073 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-15 01:13:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:31,749 INFO L93 Difference]: Finished difference Result 266 states and 612 transitions. [2020-09-15 01:13:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:13:31,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:31,751 INFO L225 Difference]: With dead ends: 266 [2020-09-15 01:13:31,751 INFO L226 Difference]: Without dead ends: 264 [2020-09-15 01:13:31,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=535, Invalid=1357, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:13:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-15 01:13:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-15 01:13:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:13:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-15 01:13:31,755 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-15 01:13:31,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:31,755 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-15 01:13:31,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-15 01:13:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:31,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:31,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:31,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:31,957 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:31,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 210 times [2020-09-15 01:13:31,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:31,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186535360] [2020-09-15 01:13:31,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:32,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186535360] [2020-09-15 01:13:32,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368334173] [2020-09-15 01:13:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:32,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:13:32,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:32,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:32,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:32,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:32,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477294254] [2020-09-15 01:13:32,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:32,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:32,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:32,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:32,591 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-15 01:13:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:34,115 INFO L93 Difference]: Finished difference Result 256 states and 592 transitions. [2020-09-15 01:13:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:13:34,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:34,117 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:13:34,117 INFO L226 Difference]: Without dead ends: 254 [2020-09-15 01:13:34,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=1064, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:13:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-15 01:13:34,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 164. [2020-09-15 01:13:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:13:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-15 01:13:34,121 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-15 01:13:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:34,121 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-15 01:13:34,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-15 01:13:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:34,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:34,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:34,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:34,323 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:34,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 211 times [2020-09-15 01:13:34,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:34,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372552968] [2020-09-15 01:13:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:34,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372552968] [2020-09-15 01:13:34,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785092763] [2020-09-15 01:13:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:34,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:34,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:34,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:36,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:36,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:36,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930081847] [2020-09-15 01:13:36,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:36,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:36,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:36,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:36,485 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-15 01:13:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:38,059 INFO L93 Difference]: Finished difference Result 263 states and 606 transitions. [2020-09-15 01:13:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:13:38,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:38,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:38,062 INFO L225 Difference]: With dead ends: 263 [2020-09-15 01:13:38,062 INFO L226 Difference]: Without dead ends: 261 [2020-09-15 01:13:38,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:13:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-09-15 01:13:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 165. [2020-09-15 01:13:38,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:13:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-15 01:13:38,066 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-15 01:13:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:38,066 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-15 01:13:38,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-15 01:13:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:38,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:38,066 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:38,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-15 01:13:38,267 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 212 times [2020-09-15 01:13:38,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:38,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600057209] [2020-09-15 01:13:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:38,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600057209] [2020-09-15 01:13:38,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037765352] [2020-09-15 01:13:38,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:38,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:38,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:38,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033420100] [2020-09-15 01:13:38,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:38,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:38,903 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-15 01:13:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:40,793 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-15 01:13:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-15 01:13:40,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:40,795 INFO L225 Difference]: With dead ends: 266 [2020-09-15 01:13:40,795 INFO L226 Difference]: Without dead ends: 264 [2020-09-15 01:13:40,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:13:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-15 01:13:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 166. [2020-09-15 01:13:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:13:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-15 01:13:40,799 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-15 01:13:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:40,800 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-15 01:13:40,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-15 01:13:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:40,800 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:41,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-15 01:13:41,001 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 213 times [2020-09-15 01:13:41,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:41,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814140495] [2020-09-15 01:13:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:41,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814140495] [2020-09-15 01:13:41,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716774023] [2020-09-15 01:13:41,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:41,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:13:41,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:41,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:41,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:41,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755012722] [2020-09-15 01:13:41,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:41,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:41,618 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-15 01:13:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:43,230 INFO L93 Difference]: Finished difference Result 250 states and 588 transitions. [2020-09-15 01:13:43,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:13:43,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:43,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:43,233 INFO L225 Difference]: With dead ends: 250 [2020-09-15 01:13:43,233 INFO L226 Difference]: Without dead ends: 248 [2020-09-15 01:13:43,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=450, Invalid=1110, Unknown=0, NotChecked=0, Total=1560 [2020-09-15 01:13:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-15 01:13:43,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 167. [2020-09-15 01:13:43,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:13:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:13:43,237 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:13:43,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:43,237 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:13:43,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:43,237 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:13:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:43,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:43,238 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:43,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-15 01:13:43,438 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 214 times [2020-09-15 01:13:43,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:43,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542435304] [2020-09-15 01:13:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:43,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542435304] [2020-09-15 01:13:43,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116509806] [2020-09-15 01:13:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:43,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:13:43,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:43,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:43,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:44,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:44,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925281932] [2020-09-15 01:13:44,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:44,036 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:13:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:45,853 INFO L93 Difference]: Finished difference Result 255 states and 608 transitions. [2020-09-15 01:13:45,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:13:45,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:45,855 INFO L225 Difference]: With dead ends: 255 [2020-09-15 01:13:45,856 INFO L226 Difference]: Without dead ends: 253 [2020-09-15 01:13:45,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-15 01:13:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-15 01:13:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2020-09-15 01:13:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:13:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:13:45,859 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:13:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:45,859 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:13:45,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:13:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:45,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:45,860 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:46,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:46,061 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 215 times [2020-09-15 01:13:46,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:46,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407783491] [2020-09-15 01:13:46,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:46,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:46,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407783491] [2020-09-15 01:13:46,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626906538] [2020-09-15 01:13:46,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:46,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:13:46,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:46,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:46,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:46,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:46,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:46,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891843352] [2020-09-15 01:13:46,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:46,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:46,600 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:13:48,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:48,071 INFO L93 Difference]: Finished difference Result 228 states and 552 transitions. [2020-09-15 01:13:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-15 01:13:48,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:48,074 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:13:48,075 INFO L226 Difference]: Without dead ends: 223 [2020-09-15 01:13:48,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=520, Invalid=1120, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:13:48,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-15 01:13:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 169. [2020-09-15 01:13:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:13:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:13:48,079 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:13:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:48,080 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:13:48,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:13:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:48,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:48,081 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:48,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-15 01:13:48,282 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 216 times [2020-09-15 01:13:48,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:48,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025219670] [2020-09-15 01:13:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:48,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025219670] [2020-09-15 01:13:48,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147147066] [2020-09-15 01:13:48,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:48,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:13:48,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:48,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:48,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:48,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:48,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455114464] [2020-09-15 01:13:48,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:48,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:48,925 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:13:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:51,197 INFO L93 Difference]: Finished difference Result 280 states and 672 transitions. [2020-09-15 01:13:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:13:51,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:51,200 INFO L225 Difference]: With dead ends: 280 [2020-09-15 01:13:51,200 INFO L226 Difference]: Without dead ends: 275 [2020-09-15 01:13:51,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-15 01:13:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-15 01:13:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 167. [2020-09-15 01:13:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:13:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-15 01:13:51,203 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-15 01:13:51,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:51,203 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-15 01:13:51,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-15 01:13:51,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:51,204 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:51,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:51,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-15 01:13:51,405 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:51,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 217 times [2020-09-15 01:13:51,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:51,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768117031] [2020-09-15 01:13:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:51,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768117031] [2020-09-15 01:13:51,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501092027] [2020-09-15 01:13:51,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:51,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:51,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:52,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:52,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:52,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089988229] [2020-09-15 01:13:52,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:52,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:52,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:52,033 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-15 01:13:53,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:53,846 INFO L93 Difference]: Finished difference Result 267 states and 637 transitions. [2020-09-15 01:13:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-15 01:13:53,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:53,849 INFO L225 Difference]: With dead ends: 267 [2020-09-15 01:13:53,849 INFO L226 Difference]: Without dead ends: 265 [2020-09-15 01:13:53,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:13:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-15 01:13:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 169. [2020-09-15 01:13:53,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:13:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:13:53,854 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:13:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:53,854 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:13:53,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:53,854 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:13:53,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:53,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:53,854 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:54,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:54,055 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:54,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 218 times [2020-09-15 01:13:54,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:54,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75217377] [2020-09-15 01:13:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:54,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75217377] [2020-09-15 01:13:54,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035546425] [2020-09-15 01:13:54,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:54,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:13:54,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:54,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:13:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:54,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:54,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:54,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123093163] [2020-09-15 01:13:54,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:54,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:54,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:54,726 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:13:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:13:57,288 INFO L93 Difference]: Finished difference Result 295 states and 712 transitions. [2020-09-15 01:13:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:13:57,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:13:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:13:57,292 INFO L225 Difference]: With dead ends: 295 [2020-09-15 01:13:57,292 INFO L226 Difference]: Without dead ends: 290 [2020-09-15 01:13:57,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=628, Invalid=1534, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:13:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-15 01:13:57,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-15 01:13:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:13:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-15 01:13:57,295 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-15 01:13:57,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:13:57,296 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-15 01:13:57,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:13:57,296 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-15 01:13:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:13:57,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:13:57,296 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:13:57,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:57,497 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:13:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:13:57,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 219 times [2020-09-15 01:13:57,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:13:57,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443014959] [2020-09-15 01:13:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:13:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:13:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:57,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443014959] [2020-09-15 01:13:57,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386375075] [2020-09-15 01:13:57,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:13:57,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:13:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:13:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:13:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:13:58,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:13:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:13:58,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:13:58,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:13:58,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040149786] [2020-09-15 01:13:58,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:13:58,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:13:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:13:58,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:13:58,104 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-15 01:14:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:00,600 INFO L93 Difference]: Finished difference Result 292 states and 706 transitions. [2020-09-15 01:14:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:14:00,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:00,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:00,604 INFO L225 Difference]: With dead ends: 292 [2020-09-15 01:14:00,604 INFO L226 Difference]: Without dead ends: 287 [2020-09-15 01:14:00,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=666, Invalid=1496, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:14:00,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-15 01:14:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 165. [2020-09-15 01:14:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-15 01:14:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-15 01:14:00,608 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-15 01:14:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:00,608 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-15 01:14:00,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-15 01:14:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:00,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:00,609 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:00,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:00,812 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:00,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 220 times [2020-09-15 01:14:00,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:00,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946209939] [2020-09-15 01:14:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:01,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946209939] [2020-09-15 01:14:01,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78871358] [2020-09-15 01:14:01,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:01,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:01,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:01,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:01,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:01,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762025114] [2020-09-15 01:14:01,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:01,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:01,550 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-15 01:14:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:03,584 INFO L93 Difference]: Finished difference Result 283 states and 656 transitions. [2020-09-15 01:14:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-15 01:14:03,586 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:03,587 INFO L225 Difference]: With dead ends: 283 [2020-09-15 01:14:03,587 INFO L226 Difference]: Without dead ends: 281 [2020-09-15 01:14:03,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=443, Invalid=1197, Unknown=0, NotChecked=0, Total=1640 [2020-09-15 01:14:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-15 01:14:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 169. [2020-09-15 01:14:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:14:03,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-15 01:14:03,592 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-15 01:14:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:03,592 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-15 01:14:03,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-15 01:14:03,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:03,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:03,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:03,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:03,804 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:03,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 221 times [2020-09-15 01:14:03,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:03,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786856209] [2020-09-15 01:14:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:04,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786856209] [2020-09-15 01:14:04,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501131078] [2020-09-15 01:14:04,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:04,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:14:04,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:04,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:04,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:04,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:04,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:04,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932352338] [2020-09-15 01:14:04,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:04,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:04,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:04,530 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-15 01:14:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:06,993 INFO L93 Difference]: Finished difference Result 278 states and 665 transitions. [2020-09-15 01:14:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-15 01:14:06,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:06,996 INFO L225 Difference]: With dead ends: 278 [2020-09-15 01:14:06,996 INFO L226 Difference]: Without dead ends: 276 [2020-09-15 01:14:06,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=539, Invalid=1353, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:14:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-15 01:14:07,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 174. [2020-09-15 01:14:07,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:14:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-15 01:14:07,005 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-15 01:14:07,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:07,005 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-15 01:14:07,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:07,005 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-15 01:14:07,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:07,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:07,006 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:07,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-15 01:14:07,214 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 222 times [2020-09-15 01:14:07,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:07,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383136959] [2020-09-15 01:14:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:07,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383136959] [2020-09-15 01:14:07,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488059055] [2020-09-15 01:14:07,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:07,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:14:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:07,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:07,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:08,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:08,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:08,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382177380] [2020-09-15 01:14:08,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:08,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:08,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:08,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:08,020 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-15 01:14:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:10,895 INFO L93 Difference]: Finished difference Result 318 states and 774 transitions. [2020-09-15 01:14:10,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:14:10,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:10,899 INFO L225 Difference]: With dead ends: 318 [2020-09-15 01:14:10,899 INFO L226 Difference]: Without dead ends: 310 [2020-09-15 01:14:10,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=644, Invalid=1612, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:14:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-15 01:14:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 176. [2020-09-15 01:14:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:14:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-15 01:14:10,904 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-15 01:14:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:10,904 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-15 01:14:10,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-15 01:14:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:10,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:11,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-15 01:14:11,109 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 223 times [2020-09-15 01:14:11,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:11,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394018444] [2020-09-15 01:14:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:11,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394018444] [2020-09-15 01:14:11,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676960696] [2020-09-15 01:14:11,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:11,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:15,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:15,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:15,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:15,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886913983] [2020-09-15 01:14:15,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:15,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=199, Unknown=2, NotChecked=0, Total=272 [2020-09-15 01:14:15,872 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-15 01:14:20,917 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-15 01:14:25,100 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-15 01:14:29,545 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-15 01:14:33,882 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-15 01:14:38,203 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-09-15 01:14:43,054 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-09-15 01:14:45,716 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-15 01:14:50,303 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-15 01:14:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:50,669 INFO L93 Difference]: Finished difference Result 316 states and 769 transitions. [2020-09-15 01:14:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:14:50,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:50,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:50,672 INFO L225 Difference]: With dead ends: 316 [2020-09-15 01:14:50,672 INFO L226 Difference]: Without dead ends: 308 [2020-09-15 01:14:50,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=664, Invalid=1686, Unknown=2, NotChecked=0, Total=2352 [2020-09-15 01:14:50,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-15 01:14:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 171. [2020-09-15 01:14:50,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-15 01:14:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-15 01:14:50,676 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-15 01:14:50,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:50,676 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-15 01:14:50,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:50,676 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-15 01:14:50,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:50,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:50,677 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:50,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-15 01:14:50,878 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 224 times [2020-09-15 01:14:50,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:50,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175884016] [2020-09-15 01:14:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:51,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175884016] [2020-09-15 01:14:51,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804213822] [2020-09-15 01:14:51,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:51,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:14:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:51,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:51,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:51,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:14:51,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:14:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:51,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:51,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:51,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912120790] [2020-09-15 01:14:51,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:51,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:51,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:51,669 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-15 01:14:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:54,860 INFO L93 Difference]: Finished difference Result 318 states and 769 transitions. [2020-09-15 01:14:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:14:54,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:54,864 INFO L225 Difference]: With dead ends: 318 [2020-09-15 01:14:54,864 INFO L226 Difference]: Without dead ends: 310 [2020-09-15 01:14:54,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=648, Invalid=1608, Unknown=0, NotChecked=0, Total=2256 [2020-09-15 01:14:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-15 01:14:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 170. [2020-09-15 01:14:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:14:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-15 01:14:54,869 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-15 01:14:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:54,869 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-15 01:14:54,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-15 01:14:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:54,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:54,869 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:55,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-15 01:14:55,073 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:55,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 225 times [2020-09-15 01:14:55,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:55,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488497170] [2020-09-15 01:14:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:55,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:55,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488497170] [2020-09-15 01:14:55,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130500778] [2020-09-15 01:14:55,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:55,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:14:55,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:55,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:55,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:55,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116592649] [2020-09-15 01:14:55,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:55,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:55,752 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-15 01:14:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:14:57,236 INFO L93 Difference]: Finished difference Result 261 states and 613 transitions. [2020-09-15 01:14:57,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-15 01:14:57,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:14:57,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:14:57,241 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:14:57,241 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:14:57,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:14:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:14:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2020-09-15 01:14:57,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:14:57,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-15 01:14:57,245 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-15 01:14:57,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:14:57,246 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-15 01:14:57,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:14:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-15 01:14:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:14:57,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:14:57,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:14:57,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-15 01:14:57,455 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:14:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:14:57,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 226 times [2020-09-15 01:14:57,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:14:57,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495519560] [2020-09-15 01:14:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:14:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:14:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:57,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495519560] [2020-09-15 01:14:57,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908192488] [2020-09-15 01:14:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:14:57,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:14:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:14:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:14:57,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:14:58,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:14:58,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:14:58,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:14:58,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713265548] [2020-09-15 01:14:58,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:14:58,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:14:58,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:14:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:14:58,173 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-15 01:15:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:00,424 INFO L93 Difference]: Finished difference Result 280 states and 660 transitions. [2020-09-15 01:15:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:15:00,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:00,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:00,427 INFO L225 Difference]: With dead ends: 280 [2020-09-15 01:15:00,427 INFO L226 Difference]: Without dead ends: 278 [2020-09-15 01:15:00,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-09-15 01:15:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-15 01:15:00,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-15 01:15:00,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:15:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-15 01:15:00,431 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-15 01:15:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:00,431 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-15 01:15:00,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-15 01:15:00,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:00,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:00,432 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:00,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:00,633 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 227 times [2020-09-15 01:15:00,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:00,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430917249] [2020-09-15 01:15:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:00,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430917249] [2020-09-15 01:15:00,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448493170] [2020-09-15 01:15:00,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:00,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:15:00,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:00,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:01,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:01,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:01,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777511077] [2020-09-15 01:15:01,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:01,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:01,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:01,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:01,291 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-15 01:15:01,788 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2020-09-15 01:15:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:03,234 INFO L93 Difference]: Finished difference Result 251 states and 596 transitions. [2020-09-15 01:15:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:15:03,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:03,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:03,237 INFO L225 Difference]: With dead ends: 251 [2020-09-15 01:15:03,238 INFO L226 Difference]: Without dead ends: 249 [2020-09-15 01:15:03,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:15:03,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-15 01:15:03,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 164. [2020-09-15 01:15:03,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:15:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-15 01:15:03,241 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-15 01:15:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:03,241 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-15 01:15:03,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-15 01:15:03,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:03,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:03,242 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:03,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:03,443 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:03,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 228 times [2020-09-15 01:15:03,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:03,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715535311] [2020-09-15 01:15:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:03,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715535311] [2020-09-15 01:15:03,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728056485] [2020-09-15 01:15:03,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:03,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:15:03,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:03,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:03,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:04,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:04,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:04,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982003226] [2020-09-15 01:15:04,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:04,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:04,150 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-15 01:15:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:06,691 INFO L93 Difference]: Finished difference Result 269 states and 647 transitions. [2020-09-15 01:15:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-15 01:15:06,694 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:06,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:06,695 INFO L225 Difference]: With dead ends: 269 [2020-09-15 01:15:06,695 INFO L226 Difference]: Without dead ends: 267 [2020-09-15 01:15:06,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=599, Invalid=1563, Unknown=0, NotChecked=0, Total=2162 [2020-09-15 01:15:06,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-09-15 01:15:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 166. [2020-09-15 01:15:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:15:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:15:06,699 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:15:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:06,699 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:15:06,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:06,699 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:15:06,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:06,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:06,700 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:06,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:06,903 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:06,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 229 times [2020-09-15 01:15:06,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:06,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764274310] [2020-09-15 01:15:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:07,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764274310] [2020-09-15 01:15:07,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348841694] [2020-09-15 01:15:07,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:07,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:07,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:07,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:07,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528647928] [2020-09-15 01:15:07,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:07,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:07,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:07,706 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:15:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:10,468 INFO L93 Difference]: Finished difference Result 280 states and 682 transitions. [2020-09-15 01:15:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-15 01:15:10,471 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:10,471 INFO L225 Difference]: With dead ends: 280 [2020-09-15 01:15:10,472 INFO L226 Difference]: Without dead ends: 272 [2020-09-15 01:15:10,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=744, Invalid=1908, Unknown=0, NotChecked=0, Total=2652 [2020-09-15 01:15:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-15 01:15:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 166. [2020-09-15 01:15:10,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:15:10,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:15:10,475 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:15:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:10,476 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:15:10,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:10,476 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:15:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:10,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:10,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:10,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:10,679 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:10,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:10,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 230 times [2020-09-15 01:15:10,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:10,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757566721] [2020-09-15 01:15:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:10,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757566721] [2020-09-15 01:15:10,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514838957] [2020-09-15 01:15:10,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:10,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:10,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:10,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:10,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:11,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:11,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:11,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:11,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802440662] [2020-09-15 01:15:11,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:11,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:11,478 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:15:14,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:14,804 INFO L93 Difference]: Finished difference Result 284 states and 697 transitions. [2020-09-15 01:15:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:15:14,807 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:14,808 INFO L225 Difference]: With dead ends: 284 [2020-09-15 01:15:14,808 INFO L226 Difference]: Without dead ends: 276 [2020-09-15 01:15:14,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=673, Invalid=1777, Unknown=0, NotChecked=0, Total=2450 [2020-09-15 01:15:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-09-15 01:15:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 164. [2020-09-15 01:15:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:15:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-15 01:15:14,812 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-15 01:15:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:14,812 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-15 01:15:14,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:14,812 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-15 01:15:14,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:14,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:14,813 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:15,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:15,014 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 231 times [2020-09-15 01:15:15,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:15,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781959423] [2020-09-15 01:15:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:15,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781959423] [2020-09-15 01:15:15,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434379417] [2020-09-15 01:15:15,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:15,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:15:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:15,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:15,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:15,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:15,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755577108] [2020-09-15 01:15:15,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:15,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:15,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:15,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:15,706 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-15 01:15:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:17,737 INFO L93 Difference]: Finished difference Result 261 states and 630 transitions. [2020-09-15 01:15:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-15 01:15:17,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:17,741 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:15:17,741 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:15:17,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2020-09-15 01:15:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:15:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 166. [2020-09-15 01:15:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-15 01:15:17,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-15 01:15:17,745 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-15 01:15:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:17,745 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-15 01:15:17,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-15 01:15:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:17,746 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:17,746 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:17,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:17,947 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 232 times [2020-09-15 01:15:17,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:17,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257356118] [2020-09-15 01:15:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:18,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257356118] [2020-09-15 01:15:18,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492930305] [2020-09-15 01:15:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:18,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:18,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:18,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:18,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:18,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:18,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314276029] [2020-09-15 01:15:18,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:18,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:18,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:18,593 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-15 01:15:20,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:20,918 INFO L93 Difference]: Finished difference Result 278 states and 682 transitions. [2020-09-15 01:15:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-15 01:15:20,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:20,923 INFO L225 Difference]: With dead ends: 278 [2020-09-15 01:15:20,923 INFO L226 Difference]: Without dead ends: 270 [2020-09-15 01:15:20,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=553, Invalid=1427, Unknown=0, NotChecked=0, Total=1980 [2020-09-15 01:15:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-15 01:15:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2020-09-15 01:15:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-15 01:15:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-15 01:15:20,926 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-15 01:15:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:20,926 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-15 01:15:20,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:20,927 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-15 01:15:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:20,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:20,927 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:21,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:21,128 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:21,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 233 times [2020-09-15 01:15:21,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:21,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475978701] [2020-09-15 01:15:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:21,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475978701] [2020-09-15 01:15:21,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771415847] [2020-09-15 01:15:21,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:21,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:15:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:21,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:21,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:21,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:21,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827748226] [2020-09-15 01:15:21,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:21,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:21,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:21,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:21,813 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-15 01:15:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:24,504 INFO L93 Difference]: Finished difference Result 294 states and 716 transitions. [2020-09-15 01:15:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-15 01:15:24,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:24,507 INFO L225 Difference]: With dead ends: 294 [2020-09-15 01:15:24,507 INFO L226 Difference]: Without dead ends: 286 [2020-09-15 01:15:24,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=634, Invalid=1718, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:15:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-15 01:15:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 157. [2020-09-15 01:15:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-15 01:15:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-15 01:15:24,510 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-15 01:15:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:24,511 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-15 01:15:24,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-15 01:15:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:24,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:24,511 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:24,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-15 01:15:24,712 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:24,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:24,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 234 times [2020-09-15 01:15:24,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:24,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159512254] [2020-09-15 01:15:24,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:24,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159512254] [2020-09-15 01:15:24,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276917010] [2020-09-15 01:15:24,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:25,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-15 01:15:25,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:25,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:25,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:15:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:25,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:25,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:25,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117581050] [2020-09-15 01:15:25,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:25,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:25,393 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-15 01:15:28,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:28,279 INFO L93 Difference]: Finished difference Result 270 states and 648 transitions. [2020-09-15 01:15:28,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-15 01:15:28,282 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:28,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:28,282 INFO L225 Difference]: With dead ends: 270 [2020-09-15 01:15:28,283 INFO L226 Difference]: Without dead ends: 262 [2020-09-15 01:15:28,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=648, Invalid=1704, Unknown=0, NotChecked=0, Total=2352 [2020-09-15 01:15:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-15 01:15:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2020-09-15 01:15:28,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-15 01:15:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-15 01:15:28,286 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-15 01:15:28,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:28,286 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-15 01:15:28,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-15 01:15:28,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:28,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:28,287 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:28,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:28,488 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:28,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:28,488 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 235 times [2020-09-15 01:15:28,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:28,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284837954] [2020-09-15 01:15:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:28,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284837954] [2020-09-15 01:15:28,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972412716] [2020-09-15 01:15:28,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:28,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:29,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:29,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:29,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076897797] [2020-09-15 01:15:29,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:29,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:29,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:29,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:29,203 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-15 01:15:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:30,521 INFO L93 Difference]: Finished difference Result 235 states and 538 transitions. [2020-09-15 01:15:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:15:30,524 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:30,524 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:15:30,524 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:15:30,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-15 01:15:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:15:30,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 153. [2020-09-15 01:15:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-15 01:15:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-15 01:15:30,527 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-15 01:15:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:30,527 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-15 01:15:30,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-15 01:15:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:30,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:30,528 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:30,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-15 01:15:30,729 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 236 times [2020-09-15 01:15:30,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:30,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717399199] [2020-09-15 01:15:30,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:30,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717399199] [2020-09-15 01:15:30,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615158748] [2020-09-15 01:15:30,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:31,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:15:31,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:31,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:31,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:31,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:31,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467708952] [2020-09-15 01:15:31,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:31,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:31,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:31,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:31,474 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-15 01:15:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:32,640 INFO L93 Difference]: Finished difference Result 227 states and 520 transitions. [2020-09-15 01:15:32,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:15:32,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:32,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:32,644 INFO L225 Difference]: With dead ends: 227 [2020-09-15 01:15:32,644 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:15:32,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:15:32,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:15:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 151. [2020-09-15 01:15:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-15 01:15:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-15 01:15:32,647 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-15 01:15:32,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:32,647 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-15 01:15:32,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:32,647 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-15 01:15:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:32,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:32,648 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:32,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-15 01:15:32,849 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 237 times [2020-09-15 01:15:32,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:32,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742976569] [2020-09-15 01:15:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:33,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742976569] [2020-09-15 01:15:33,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071240361] [2020-09-15 01:15:33,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:33,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:15:33,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:33,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:33,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:33,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:15:33,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992332250] [2020-09-15 01:15:33,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:15:33,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:33,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:15:33,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:15:33,690 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-15 01:15:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:15:35,560 INFO L93 Difference]: Finished difference Result 235 states and 542 transitions. [2020-09-15 01:15:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-15 01:15:35,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:15:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:15:35,564 INFO L225 Difference]: With dead ends: 235 [2020-09-15 01:15:35,564 INFO L226 Difference]: Without dead ends: 233 [2020-09-15 01:15:35,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:15:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-15 01:15:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 152. [2020-09-15 01:15:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-15 01:15:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-15 01:15:35,568 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-15 01:15:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:15:35,568 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-15 01:15:35,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:15:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-15 01:15:35,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:15:35,568 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:15:35,568 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:15:35,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:35,769 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:15:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:15:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 238 times [2020-09-15 01:15:35,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:15:35,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48215057] [2020-09-15 01:15:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:15:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:15:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:36,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48215057] [2020-09-15 01:15:36,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468232885] [2020-09-15 01:15:36,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:15:36,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:15:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:15:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:15:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:15:36,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:15:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:15:38,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:15:38,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-15 01:15:38,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938831815] [2020-09-15 01:15:38,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-15 01:15:38,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:15:38,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-15 01:15:38,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=232, Unknown=1, NotChecked=0, Total=306 [2020-09-15 01:15:38,227 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-15 01:16:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:28,569 INFO L93 Difference]: Finished difference Result 274 states and 638 transitions. [2020-09-15 01:16:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-15 01:16:28,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-15 01:16:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:28,572 INFO L225 Difference]: With dead ends: 274 [2020-09-15 01:16:28,572 INFO L226 Difference]: Without dead ends: 269 [2020-09-15 01:16:28,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=522, Invalid=1280, Unknown=4, NotChecked=0, Total=1806 [2020-09-15 01:16:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-15 01:16:28,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 150. [2020-09-15 01:16:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-15 01:16:28,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-15 01:16:28,576 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-15 01:16:28,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:28,576 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-15 01:16:28,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-15 01:16:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-15 01:16:28,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:28,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:28,576 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:28,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-15 01:16:28,777 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 239 times [2020-09-15 01:16:28,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:28,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566709193] [2020-09-15 01:16:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:29,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566709193] [2020-09-15 01:16:29,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945572300] [2020-09-15 01:16:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:29,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:16:29,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-15 01:16:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:29,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:29,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:29,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-15 01:16:29,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750436192] [2020-09-15 01:16:29,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-15 01:16:29,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-15 01:16:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-15 01:16:29,500 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-15 01:16:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:31,704 INFO L93 Difference]: Finished difference Result 241 states and 562 transitions. [2020-09-15 01:16:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-15 01:16:31,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-15 01:16:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:31,708 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:16:31,709 INFO L226 Difference]: Without dead ends: 236 [2020-09-15 01:16:31,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=426, Invalid=1056, Unknown=0, NotChecked=0, Total=1482 [2020-09-15 01:16:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-15 01:16:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 146. [2020-09-15 01:16:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-15 01:16:31,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-15 01:16:31,712 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-15 01:16:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:31,717 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-15 01:16:31,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-15 01:16:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-15 01:16:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:31,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:31,718 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:31,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:31,919 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:31,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-15 01:16:31,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:31,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610013060] [2020-09-15 01:16:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:32,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610013060] [2020-09-15 01:16:32,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124178966] [2020-09-15 01:16:32,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:32,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:32,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-15 01:16:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:32,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:32,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-15 01:16:32,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375935336] [2020-09-15 01:16:32,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-15 01:16:32,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-15 01:16:32,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:16:32,839 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-15 01:16:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:33,472 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-15 01:16:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:16:33,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-15 01:16:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:33,475 INFO L225 Difference]: With dead ends: 206 [2020-09-15 01:16:33,476 INFO L226 Difference]: Without dead ends: 201 [2020-09-15 01:16:33,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:16:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-15 01:16:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-15 01:16:33,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-15 01:16:33,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-15 01:16:33,484 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-15 01:16:33,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:33,485 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-15 01:16:33,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-15 01:16:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-15 01:16:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:33,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:33,485 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:33,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:33,686 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:33,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:33,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-15 01:16:33,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:33,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952009062] [2020-09-15 01:16:33,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:34,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952009062] [2020-09-15 01:16:34,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123743358] [2020-09-15 01:16:34,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:34,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:34,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:34,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:34,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:34,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311949935] [2020-09-15 01:16:34,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:34,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:34,555 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-15 01:16:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:35,283 INFO L93 Difference]: Finished difference Result 208 states and 487 transitions. [2020-09-15 01:16:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:16:35,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:35,287 INFO L225 Difference]: With dead ends: 208 [2020-09-15 01:16:35,287 INFO L226 Difference]: Without dead ends: 205 [2020-09-15 01:16:35,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-15 01:16:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 167. [2020-09-15 01:16:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:16:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-15 01:16:35,290 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-15 01:16:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:35,290 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-15 01:16:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-15 01:16:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:35,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:35,291 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:35,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:35,492 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-15 01:16:35,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:35,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355108280] [2020-09-15 01:16:35,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:35,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355108280] [2020-09-15 01:16:35,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009186363] [2020-09-15 01:16:35,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:35,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:16:35,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:35,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:36,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:36,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:36,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180684299] [2020-09-15 01:16:36,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:36,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:36,383 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-15 01:16:37,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:37,354 INFO L93 Difference]: Finished difference Result 228 states and 526 transitions. [2020-09-15 01:16:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:16:37,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:37,358 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:16:37,358 INFO L226 Difference]: Without dead ends: 225 [2020-09-15 01:16:37,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:16:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-15 01:16:37,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2020-09-15 01:16:37,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-15 01:16:37,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-15 01:16:37,362 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-15 01:16:37,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:37,362 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-15 01:16:37,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-15 01:16:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:37,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:37,363 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:37,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:37,564 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:37,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:37,564 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-15 01:16:37,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:37,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089674472] [2020-09-15 01:16:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:37,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089674472] [2020-09-15 01:16:37,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664070615] [2020-09-15 01:16:37,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:37,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:16:37,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:38,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:38,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:38,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820136827] [2020-09-15 01:16:38,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:38,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:38,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:38,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:38,503 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-15 01:16:39,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:39,808 INFO L93 Difference]: Finished difference Result 239 states and 550 transitions. [2020-09-15 01:16:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-15 01:16:39,811 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:39,812 INFO L225 Difference]: With dead ends: 239 [2020-09-15 01:16:39,812 INFO L226 Difference]: Without dead ends: 236 [2020-09-15 01:16:39,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=830, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:16:39,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-15 01:16:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 168. [2020-09-15 01:16:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-15 01:16:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-15 01:16:39,815 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-15 01:16:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:39,815 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-15 01:16:39,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-15 01:16:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:39,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:39,816 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:40,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-15 01:16:40,017 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-15 01:16:40,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:40,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207690192] [2020-09-15 01:16:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:40,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207690192] [2020-09-15 01:16:40,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378542196] [2020-09-15 01:16:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:40,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:40,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:40,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994751187] [2020-09-15 01:16:40,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:40,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:40,929 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-15 01:16:42,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:42,403 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2020-09-15 01:16:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:16:42,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:42,407 INFO L225 Difference]: With dead ends: 244 [2020-09-15 01:16:42,408 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:16:42,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2020-09-15 01:16:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:16:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 169. [2020-09-15 01:16:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-15 01:16:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-15 01:16:42,412 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-15 01:16:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:42,412 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-15 01:16:42,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-15 01:16:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:42,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:42,413 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:42,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable277,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:42,614 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:42,614 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-15 01:16:42,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:42,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847726278] [2020-09-15 01:16:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:42,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847726278] [2020-09-15 01:16:42,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190974296] [2020-09-15 01:16:42,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:42,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:42,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:42,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:42,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:43,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:43,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:43,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077430253] [2020-09-15 01:16:43,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:43,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:43,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:43,526 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-15 01:16:45,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:45,243 INFO L93 Difference]: Finished difference Result 243 states and 562 transitions. [2020-09-15 01:16:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-15 01:16:45,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:45,247 INFO L225 Difference]: With dead ends: 243 [2020-09-15 01:16:45,247 INFO L226 Difference]: Without dead ends: 240 [2020-09-15 01:16:45,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=387, Invalid=1019, Unknown=0, NotChecked=0, Total=1406 [2020-09-15 01:16:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-15 01:16:45,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2020-09-15 01:16:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:16:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-15 01:16:45,252 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-15 01:16:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:45,252 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-15 01:16:45,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-15 01:16:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:45,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:45,252 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:45,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-15 01:16:45,453 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-15 01:16:45,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:45,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944677618] [2020-09-15 01:16:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:45,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944677618] [2020-09-15 01:16:45,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085980696] [2020-09-15 01:16:45,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:45,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-15 01:16:45,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:45,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:46,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:46,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:46,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085158621] [2020-09-15 01:16:46,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:46,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:46,338 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-15 01:16:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:47,827 INFO L93 Difference]: Finished difference Result 238 states and 554 transitions. [2020-09-15 01:16:47,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-15 01:16:47,830 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:47,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:47,830 INFO L225 Difference]: With dead ends: 238 [2020-09-15 01:16:47,831 INFO L226 Difference]: Without dead ends: 235 [2020-09-15 01:16:47,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2020-09-15 01:16:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-15 01:16:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 172. [2020-09-15 01:16:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-15 01:16:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-15 01:16:47,834 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-15 01:16:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:47,834 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-15 01:16:47,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-15 01:16:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:47,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:47,839 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:48,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-15 01:16:48,040 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:48,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:48,040 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-15 01:16:48,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:48,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56546695] [2020-09-15 01:16:48,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:48,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56546695] [2020-09-15 01:16:48,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015128307] [2020-09-15 01:16:48,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:48,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:48,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:48,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:48,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061390235] [2020-09-15 01:16:48,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:48,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:48,863 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-15 01:16:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:50,036 INFO L93 Difference]: Finished difference Result 223 states and 526 transitions. [2020-09-15 01:16:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:16:50,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:50,040 INFO L225 Difference]: With dead ends: 223 [2020-09-15 01:16:50,040 INFO L226 Difference]: Without dead ends: 220 [2020-09-15 01:16:50,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-15 01:16:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-15 01:16:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 174. [2020-09-15 01:16:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:16:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-15 01:16:50,044 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-15 01:16:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:50,045 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-15 01:16:50,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-15 01:16:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-15 01:16:50,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:50,045 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:50,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:50,246 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:50,247 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-15 01:16:50,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:50,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677109372] [2020-09-15 01:16:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:50,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677109372] [2020-09-15 01:16:50,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935510792] [2020-09-15 01:16:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:50,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-15 01:16:50,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:50,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:50,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-15 01:16:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:51,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:51,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:51,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115999912] [2020-09-15 01:16:51,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:51,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:51,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:51,030 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-15 01:16:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:52,457 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-15 01:16:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:16:52,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-15 01:16:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:52,461 INFO L225 Difference]: With dead ends: 228 [2020-09-15 01:16:52,462 INFO L226 Difference]: Without dead ends: 222 [2020-09-15 01:16:52,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2020-09-15 01:16:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-15 01:16:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-15 01:16:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-15 01:16:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-15 01:16:52,465 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-15 01:16:52,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:52,466 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-15 01:16:52,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-15 01:16:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:16:52,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:52,466 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:52,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-15 01:16:52,667 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:52,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:52,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 240 times [2020-09-15 01:16:52,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:52,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224486581] [2020-09-15 01:16:52,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224486581] [2020-09-15 01:16:53,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105016099] [2020-09-15 01:16:53,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:53,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:16:53,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:53,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:53,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:53,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:53,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:53,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729444573] [2020-09-15 01:16:53,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:53,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:53,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:53,648 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-15 01:16:53,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:53,850 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-15 01:16:53,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-15 01:16:53,854 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:16:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:53,854 INFO L225 Difference]: With dead ends: 213 [2020-09-15 01:16:53,855 INFO L226 Difference]: Without dead ends: 211 [2020-09-15 01:16:53,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:53,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-15 01:16:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-15 01:16:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-15 01:16:53,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-15 01:16:53,859 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-15 01:16:53,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:53,860 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-15 01:16:53,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:53,860 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-15 01:16:53,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:16:53,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:53,860 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:54,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:54,070 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:54,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 241 times [2020-09-15 01:16:54,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:54,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89444213] [2020-09-15 01:16:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:54,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89444213] [2020-09-15 01:16:54,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089530960] [2020-09-15 01:16:54,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:54,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:55,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:55,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:55,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743175368] [2020-09-15 01:16:55,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:55,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:55,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:55,037 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-15 01:16:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:55,371 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-15 01:16:55,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-15 01:16:55,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:16:55,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:55,374 INFO L225 Difference]: With dead ends: 226 [2020-09-15 01:16:55,374 INFO L226 Difference]: Without dead ends: 224 [2020-09-15 01:16:55,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-09-15 01:16:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-15 01:16:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-15 01:16:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-15 01:16:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-15 01:16:55,377 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-15 01:16:55,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:55,377 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-15 01:16:55,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:55,378 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-15 01:16:55,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:16:55,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:55,378 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:55,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:55,579 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:55,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:55,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 242 times [2020-09-15 01:16:55,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:55,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104819786] [2020-09-15 01:16:55,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:55,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104819786] [2020-09-15 01:16:55,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108527883] [2020-09-15 01:16:55,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:55,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:16:55,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:56,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:56,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:56,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586158925] [2020-09-15 01:16:56,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:56,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:56,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:56,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:56,596 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-15 01:16:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:57,186 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-15 01:16:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-15 01:16:57,189 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:16:57,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:57,190 INFO L225 Difference]: With dead ends: 241 [2020-09-15 01:16:57,190 INFO L226 Difference]: Without dead ends: 239 [2020-09-15 01:16:57,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-15 01:16:57,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-15 01:16:57,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-15 01:16:57,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:16:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-15 01:16:57,193 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-15 01:16:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:57,193 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-15 01:16:57,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-15 01:16:57,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:16:57,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:57,194 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:57,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:57,395 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:57,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 243 times [2020-09-15 01:16:57,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:57,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512625969] [2020-09-15 01:16:57,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:57,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512625969] [2020-09-15 01:16:57,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576782943] [2020-09-15 01:16:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:57,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:16:57,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:57,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:16:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:58,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:16:58,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:16:58,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869975808] [2020-09-15 01:16:58,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:16:58,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:16:58,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:16:58,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:16:58,428 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-15 01:16:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:16:59,273 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-15 01:16:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-15 01:16:59,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:16:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:16:59,277 INFO L225 Difference]: With dead ends: 243 [2020-09-15 01:16:59,277 INFO L226 Difference]: Without dead ends: 241 [2020-09-15 01:16:59,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:16:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-15 01:16:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-15 01:16:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-15 01:16:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-15 01:16:59,281 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-15 01:16:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:16:59,281 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-15 01:16:59,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:16:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-15 01:16:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:16:59,282 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:16:59,282 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:16:59,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:59,483 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:16:59,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:16:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 244 times [2020-09-15 01:16:59,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:16:59,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652189971] [2020-09-15 01:16:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:16:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:16:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:16:59,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652189971] [2020-09-15 01:16:59,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060959702] [2020-09-15 01:16:59,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:16:59,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:16:59,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:16:59,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:16:59,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:02,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:02,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:17:02,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939534529] [2020-09-15 01:17:02,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:17:02,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:02,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:17:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=238, Unknown=1, NotChecked=0, Total=342 [2020-09-15 01:17:02,621 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-15 01:17:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:05,536 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-15 01:17:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:17:05,539 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:17:05,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:05,539 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:17:05,539 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:17:05,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=170, Invalid=380, Unknown=2, NotChecked=0, Total=552 [2020-09-15 01:17:05,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:17:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-15 01:17:05,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:17:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:17:05,543 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:17:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:05,543 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:17:05,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:17:05,543 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:17:05,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:17:05,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:05,543 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:05,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:05,744 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:05,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 245 times [2020-09-15 01:17:05,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:05,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116006285] [2020-09-15 01:17:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:06,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116006285] [2020-09-15 01:17:06,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82936398] [2020-09-15 01:17:06,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:06,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:17:06,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:06,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:06,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:17:06,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93263510] [2020-09-15 01:17:06,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:17:06,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:17:06,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:17:06,966 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:17:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:07,894 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-15 01:17:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-15 01:17:07,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:17:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:07,898 INFO L225 Difference]: With dead ends: 247 [2020-09-15 01:17:07,898 INFO L226 Difference]: Without dead ends: 245 [2020-09-15 01:17:07,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-15 01:17:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-15 01:17:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-15 01:17:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:17:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-15 01:17:07,901 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-15 01:17:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:07,902 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-15 01:17:07,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:17:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-15 01:17:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:17:07,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:07,902 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:08,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-15 01:17:08,103 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:08,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 246 times [2020-09-15 01:17:08,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:08,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720567098] [2020-09-15 01:17:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:08,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:08,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720567098] [2020-09-15 01:17:08,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636202037] [2020-09-15 01:17:08,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:08,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-15 01:17:08,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:08,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:08,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:13,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:13,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:17:13,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148608832] [2020-09-15 01:17:13,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:17:13,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:17:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:17:13,184 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-15 01:17:14,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:14,363 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-15 01:17:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:17:14,366 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:17:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:14,367 INFO L225 Difference]: With dead ends: 245 [2020-09-15 01:17:14,367 INFO L226 Difference]: Without dead ends: 243 [2020-09-15 01:17:14,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-15 01:17:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-15 01:17:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-15 01:17:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:17:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:17:14,371 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:17:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:14,371 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:17:14,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:17:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:17:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:17:14,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:14,372 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:14,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-15 01:17:14,573 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 247 times [2020-09-15 01:17:14,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:14,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481968677] [2020-09-15 01:17:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:14,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481968677] [2020-09-15 01:17:14,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074834143] [2020-09-15 01:17:14,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:14,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:14,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:17:19,547 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 37 [2020-09-15 01:17:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:23,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:17:23,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:17:23,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095069977] [2020-09-15 01:17:23,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:17:23,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:17:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:17:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=240, Unknown=1, NotChecked=0, Total=342 [2020-09-15 01:17:23,355 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:17:29,740 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-09-15 01:17:43,528 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 41 [2020-09-15 01:17:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:17:43,793 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-15 01:17:43,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-15 01:17:43,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:17:43,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:17:43,797 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:17:43,797 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:17:43,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=196, Invalid=453, Unknown=1, NotChecked=0, Total=650 [2020-09-15 01:17:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:17:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 176. [2020-09-15 01:17:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:17:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-15 01:17:43,801 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-15 01:17:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:17:43,801 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-15 01:17:43,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:17:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-15 01:17:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:17:43,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:17:43,802 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:17:44,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-15 01:17:44,003 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:17:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:17:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 248 times [2020-09-15 01:17:44,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:17:44,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147815031] [2020-09-15 01:17:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:17:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:17:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:17:44,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147815031] [2020-09-15 01:17:44,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291009072] [2020-09-15 01:17:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:17:44,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:17:44,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:17:44,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:17:44,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:03,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:03,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:03,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134925822] [2020-09-15 01:18:03,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:03,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:03,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:03,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=232, Unknown=7, NotChecked=0, Total=342 [2020-09-15 01:18:03,598 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-15 01:18:07,955 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-15 01:18:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:11,495 INFO L93 Difference]: Finished difference Result 254 states and 602 transitions. [2020-09-15 01:18:11,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:18:11,499 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:11,500 INFO L225 Difference]: With dead ends: 254 [2020-09-15 01:18:11,500 INFO L226 Difference]: Without dead ends: 252 [2020-09-15 01:18:11,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=206, Invalid=436, Unknown=8, NotChecked=0, Total=650 [2020-09-15 01:18:11,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-15 01:18:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-09-15 01:18:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:18:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:18:11,504 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:18:11,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:11,504 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:18:11,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:18:11,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:11,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:11,505 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:11,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2020-09-15 01:18:11,706 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 249 times [2020-09-15 01:18:11,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:11,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920573628] [2020-09-15 01:18:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:12,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920573628] [2020-09-15 01:18:12,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193624555] [2020-09-15 01:18:12,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:12,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:12,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:13,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:13,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:13,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732094118] [2020-09-15 01:18:13,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:13,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:13,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:13,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:13,894 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:18:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:15,072 INFO L93 Difference]: Finished difference Result 256 states and 605 transitions. [2020-09-15 01:18:15,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-15 01:18:15,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:15,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:15,076 INFO L225 Difference]: With dead ends: 256 [2020-09-15 01:18:15,076 INFO L226 Difference]: Without dead ends: 254 [2020-09-15 01:18:15,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-09-15 01:18:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-15 01:18:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 172. [2020-09-15 01:18:15,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-15 01:18:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 438 transitions. [2020-09-15 01:18:15,081 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 438 transitions. Word has length 15 [2020-09-15 01:18:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:15,081 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 438 transitions. [2020-09-15 01:18:15,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 438 transitions. [2020-09-15 01:18:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:15,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:15,081 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:15,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:15,282 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:15,283 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 250 times [2020-09-15 01:18:15,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:15,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245437455] [2020-09-15 01:18:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:15,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245437455] [2020-09-15 01:18:15,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542401083] [2020-09-15 01:18:15,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:15,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:15,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:15,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:15,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:16,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:16,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:16,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856060728] [2020-09-15 01:18:16,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:16,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:16,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:16,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:16,264 INFO L87 Difference]: Start difference. First operand 172 states and 438 transitions. Second operand 19 states. [2020-09-15 01:18:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:17,419 INFO L93 Difference]: Finished difference Result 247 states and 586 transitions. [2020-09-15 01:18:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:17,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:17,424 INFO L225 Difference]: With dead ends: 247 [2020-09-15 01:18:17,425 INFO L226 Difference]: Without dead ends: 245 [2020-09-15 01:18:17,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:18:17,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-15 01:18:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-15 01:18:17,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-15 01:18:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-15 01:18:17,428 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-15 01:18:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:17,428 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-15 01:18:17,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-15 01:18:17,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:17,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:17,429 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:17,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:17,630 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 251 times [2020-09-15 01:18:17,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:17,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065945809] [2020-09-15 01:18:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:17,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065945809] [2020-09-15 01:18:17,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571457342] [2020-09-15 01:18:17,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:18,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:18,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:18,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:18,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:18,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:18,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212755393] [2020-09-15 01:18:18,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:18,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:18,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:18,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:18,619 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-15 01:18:19,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:19,790 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-15 01:18:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:19,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:19,795 INFO L225 Difference]: With dead ends: 253 [2020-09-15 01:18:19,795 INFO L226 Difference]: Without dead ends: 251 [2020-09-15 01:18:19,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:18:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-15 01:18:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-09-15 01:18:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-09-15 01:18:19,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 447 transitions. [2020-09-15 01:18:19,798 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 447 transitions. Word has length 15 [2020-09-15 01:18:19,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:19,798 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 447 transitions. [2020-09-15 01:18:19,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:19,799 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 447 transitions. [2020-09-15 01:18:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:19,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:19,799 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:20,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:20,002 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -884124787, now seen corresponding path program 252 times [2020-09-15 01:18:20,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:20,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577902609] [2020-09-15 01:18:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577902609] [2020-09-15 01:18:20,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269977226] [2020-09-15 01:18:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:20,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-15 01:18:20,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:21,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:21,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:21,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633225075] [2020-09-15 01:18:21,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:21,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:21,214 INFO L87 Difference]: Start difference. First operand 175 states and 447 transitions. Second operand 19 states. [2020-09-15 01:18:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:22,302 INFO L93 Difference]: Finished difference Result 254 states and 600 transitions. [2020-09-15 01:18:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-15 01:18:22,306 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:22,306 INFO L225 Difference]: With dead ends: 254 [2020-09-15 01:18:22,306 INFO L226 Difference]: Without dead ends: 252 [2020-09-15 01:18:22,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:18:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-15 01:18:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 174. [2020-09-15 01:18:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-15 01:18:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-15 01:18:22,310 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-15 01:18:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:22,310 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-15 01:18:22,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:22,311 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-15 01:18:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:22,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:22,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:22,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:22,512 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash -883231057, now seen corresponding path program 253 times [2020-09-15 01:18:22,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:22,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207884357] [2020-09-15 01:18:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:22,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207884357] [2020-09-15 01:18:22,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333545355] [2020-09-15 01:18:22,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:22,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:22,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:23,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:23,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:23,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106721077] [2020-09-15 01:18:23,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:23,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:23,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:23,421 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-15 01:18:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:24,673 INFO L93 Difference]: Finished difference Result 260 states and 612 transitions. [2020-09-15 01:18:24,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:18:24,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:24,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:24,684 INFO L225 Difference]: With dead ends: 260 [2020-09-15 01:18:24,684 INFO L226 Difference]: Without dead ends: 258 [2020-09-15 01:18:24,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-15 01:18:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-15 01:18:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 177. [2020-09-15 01:18:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:18:24,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:18:24,687 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:18:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:24,687 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:18:24,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:24,687 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:18:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:24,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:24,687 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:24,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable295 [2020-09-15 01:18:24,888 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash -883230096, now seen corresponding path program 254 times [2020-09-15 01:18:24,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:24,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145513504] [2020-09-15 01:18:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:25,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145513504] [2020-09-15 01:18:25,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116551585] [2020-09-15 01:18:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:25,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-15 01:18:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:25,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:25,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:25,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478344194] [2020-09-15 01:18:25,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:25,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:25,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:25,753 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:18:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:26,809 INFO L93 Difference]: Finished difference Result 264 states and 623 transitions. [2020-09-15 01:18:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-15 01:18:26,813 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:26,814 INFO L225 Difference]: With dead ends: 264 [2020-09-15 01:18:26,814 INFO L226 Difference]: Without dead ends: 262 [2020-09-15 01:18:26,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2020-09-15 01:18:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-15 01:18:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 179. [2020-09-15 01:18:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-15 01:18:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 459 transitions. [2020-09-15 01:18:26,818 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 459 transitions. Word has length 15 [2020-09-15 01:18:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:26,819 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 459 transitions. [2020-09-15 01:18:26,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 459 transitions. [2020-09-15 01:18:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:26,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:26,819 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:27,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:27,020 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:27,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash -883201266, now seen corresponding path program 255 times [2020-09-15 01:18:27,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:27,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748352940] [2020-09-15 01:18:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:27,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748352940] [2020-09-15 01:18:27,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217852439] [2020-09-15 01:18:27,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:27,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-15 01:18:27,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:27,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:27,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:28,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:28,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:28,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800010981] [2020-09-15 01:18:28,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:28,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:28,008 INFO L87 Difference]: Start difference. First operand 179 states and 459 transitions. Second operand 19 states. [2020-09-15 01:18:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:29,393 INFO L93 Difference]: Finished difference Result 261 states and 620 transitions. [2020-09-15 01:18:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-15 01:18:29,397 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:29,402 INFO L225 Difference]: With dead ends: 261 [2020-09-15 01:18:29,402 INFO L226 Difference]: Without dead ends: 259 [2020-09-15 01:18:29,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-15 01:18:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-15 01:18:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 177. [2020-09-15 01:18:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:18:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:18:29,405 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:18:29,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:29,405 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:18:29,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:18:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:29,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:29,406 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:29,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:29,608 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:29,609 INFO L82 PathProgramCache]: Analyzing trace with hash -855524466, now seen corresponding path program 256 times [2020-09-15 01:18:29,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:29,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975765829] [2020-09-15 01:18:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:29,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975765829] [2020-09-15 01:18:29,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414873346] [2020-09-15 01:18:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:29,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-15 01:18:29,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:29,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:29,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:30,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:30,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:30,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676764083] [2020-09-15 01:18:30,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:30,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:30,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:30,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-09-15 01:18:30,676 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-15 01:18:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-15 01:18:32,072 INFO L93 Difference]: Finished difference Result 259 states and 612 transitions. [2020-09-15 01:18:32,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-15 01:18:32,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-15 01:18:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-15 01:18:32,077 INFO L225 Difference]: With dead ends: 259 [2020-09-15 01:18:32,077 INFO L226 Difference]: Without dead ends: 257 [2020-09-15 01:18:32,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2020-09-15 01:18:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-09-15 01:18:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 177. [2020-09-15 01:18:32,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-15 01:18:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-15 01:18:32,081 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-15 01:18:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-15 01:18:32,081 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-15 01:18:32,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-15 01:18:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-15 01:18:32,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-15 01:18:32,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-15 01:18:32,081 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-15 01:18:32,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:32,282 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-15 01:18:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-15 01:18:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -855495636, now seen corresponding path program 257 times [2020-09-15 01:18:32,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-15 01:18:32,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067008757] [2020-09-15 01:18:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-15 01:18:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-15 01:18:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:32,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067008757] [2020-09-15 01:18:32,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60974659] [2020-09-15 01:18:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-15 01:18:32,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-15 01:18:32,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-15 01:18:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-15 01:18:32,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-15 01:18:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-15 01:18:41,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-15 01:18:41,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-15 01:18:41,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751182107] [2020-09-15 01:18:41,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-15 01:18:41,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-15 01:18:41,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-15 01:18:41,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=246, Unknown=2, NotChecked=0, Total=342 [2020-09-15 01:18:41,637 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states.