/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:36:53,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:36:53,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:36:53,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:36:53,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:36:53,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:36:53,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:36:53,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:36:53,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:36:53,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:36:53,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:36:53,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:36:53,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:36:53,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:36:53,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:36:53,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:36:53,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:36:53,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:36:53,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:36:53,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:36:53,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:36:53,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:36:53,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:36:53,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:36:53,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:36:53,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:36:53,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:36:53,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:36:53,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:36:53,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:36:53,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:36:53,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:36:53,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:36:53,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:36:53,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:36:53,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:36:53,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:36:53,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:36:53,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:36:53,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:36:53,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:36:53,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-14 12:36:53,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:36:53,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:36:53,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:36:53,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:36:53,422 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:36:53,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:36:53,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:36:53,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:36:53,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:36:53,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:36:53,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:36:53,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:36:53,425 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:36:53,426 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:36:53,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:36:53,426 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:36:53,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:36:53,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:36:53,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:36:53,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:36:53,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:36:53,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:36:53,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:36:53,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:36:53,428 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:36:53,428 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:36:53,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:36:53,429 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:36:53,429 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:36:53,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:36:54,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:36:54,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:36:54,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:36:54,485 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:36:54,486 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:36:54,489 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-14 12:36:54,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/642a2de11/35caad582f0b41cdbc57157037970766/FLAGdb2914094 [2020-09-14 12:36:55,183 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:36:55,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2020-09-14 12:36:55,200 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/642a2de11/35caad582f0b41cdbc57157037970766/FLAGdb2914094 [2020-09-14 12:36:55,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/642a2de11/35caad582f0b41cdbc57157037970766 [2020-09-14 12:36:55,453 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:36:55,460 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:36:55,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:36:55,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:36:55,467 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:36:55,468 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:36:55" (1/1) ... [2020-09-14 12:36:55,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d15310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:55, skipping insertion in model container [2020-09-14 12:36:55,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:36:55" (1/1) ... [2020-09-14 12:36:55,480 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:36:55,530 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:36:56,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:36:56,075 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:36:56,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:36:56,220 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:36:56,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56 WrapperNode [2020-09-14 12:36:56,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:36:56,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:36:56,222 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:36:56,222 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:36:56,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,253 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:36:56,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:36:56,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:36:56,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:36:56,287 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (1/1) ... [2020-09-14 12:36:56,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:36:56,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:36:56,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:36:56,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:36:56,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (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 [2020-09-14 12:36:56,398 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:36:56,398 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:36:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:36:56,399 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:36:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:36:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:36:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:36:56,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:36:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:36:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:36:56,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:36:56,402 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:36:56,863 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:36:56,864 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:36:56,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:36:56 BoogieIcfgContainer [2020-09-14 12:36:56,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:36:56,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:36:56,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:36:56,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:36:56,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:36:55" (1/3) ... [2020-09-14 12:36:56,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723790dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:36:56, skipping insertion in model container [2020-09-14 12:36:56,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:36:56" (2/3) ... [2020-09-14 12:36:56,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723790dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:36:56, skipping insertion in model container [2020-09-14 12:36:56,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:36:56" (3/3) ... [2020-09-14 12:36:56,879 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2020-09-14 12:36:56,892 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:36:56,892 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:36:56,901 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:36:56,902 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:36:56,935 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,936 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,936 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,936 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,937 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,938 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,939 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,940 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,941 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,942 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,943 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,944 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,949 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,949 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,950 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,951 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,958 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,958 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,958 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,959 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,959 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,959 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:36:56,984 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:36:57,009 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:36:57,009 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:36:57,009 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:36:57,010 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:36:57,010 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:36:57,010 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:36:57,010 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:36:57,010 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:36:57,029 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,032 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,082 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-14 12:36:57,082 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:36:57,089 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. [2020-09-14 12:36:57,092 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-14 12:36:57,111 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-14 12:36:57,111 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:36:57,112 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. [2020-09-14 12:36:57,115 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-14 12:36:57,116 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:36:58,351 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-14 12:36:58,496 INFO L206 etLargeBlockEncoding]: Checked pairs total: 988 [2020-09-14 12:36:58,496 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-14 12:36:58,501 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:36:58,515 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:36:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:36:58,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:36:58,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:58,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:36:58,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:58,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-09-14 12:36:58,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:58,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114965989] [2020-09-14 12:36:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:58,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114965989] [2020-09-14 12:36:58,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:58,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:36:58,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438742538] [2020-09-14 12:36:58,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:36:58,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:58,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:36:58,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:36:58,879 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:36:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:58,973 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-14 12:36:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:36:58,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:36:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:58,999 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:36:59,000 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:36:59,002 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 [2020-09-14 12:36:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:36:59,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-14 12:36:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:36:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-14 12:36:59,050 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-14 12:36:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,051 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-14 12:36:59,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:36:59,051 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-14 12:36:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:36:59,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-09-14 12:36:59,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217415352] [2020-09-14 12:36:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217415352] [2020-09-14 12:36:59,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834031696] [2020-09-14 12:36:59,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,192 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-14 12:36:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,275 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-14 12:36:59,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:36:59,275 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,277 INFO L225 Difference]: With dead ends: 80 [2020-09-14 12:36:59,277 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:36:59,278 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 [2020-09-14 12:36:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:36:59,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-14 12:36:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:36:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-14 12:36:59,289 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-14 12:36:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,291 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-14 12:36:59,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,291 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-14 12:36:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,293 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:36:59,293 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-09-14 12:36:59,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229546418] [2020-09-14 12:36:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229546418] [2020-09-14 12:36:59,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886582195] [2020-09-14 12:36:59,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,401 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-14 12:36:59,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,431 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-14 12:36:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:36:59,432 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,434 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:36:59,434 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:36:59,434 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 [2020-09-14 12:36:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:36:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-14 12:36:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:36:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-14 12:36:59,445 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-14 12:36:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,445 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-14 12:36:59,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-14 12:36:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:36:59,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:36:59,447 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,448 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-09-14 12:36:59,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086588901] [2020-09-14 12:36:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086588901] [2020-09-14 12:36:59,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:36:59,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:36:59,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716427101] [2020-09-14 12:36:59,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:36:59,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:36:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:36:59,522 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-14 12:36:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:36:59,584 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-14 12:36:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:36:59,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:36:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:36:59,586 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:36:59,587 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:36:59,587 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 [2020-09-14 12:36:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:36:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-14 12:36:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:36:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-14 12:36:59,598 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-14 12:36:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:36:59,598 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-14 12:36:59,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:36:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-14 12:36:59,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:36:59,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:36:59,600 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:36:59,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:36:59,600 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:36:59,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:36:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-09-14 12:36:59,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:36:59,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175422561] [2020-09-14 12:36:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:36:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:36:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175422561] [2020-09-14 12:36:59,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826864514] [2020-09-14 12:36:59,725 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 [2020-09-14 12:36:59,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:36:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:36:59,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:36:59,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:36:59,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:36:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:36:59,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:36:59,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-14 12:36:59,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26000936] [2020-09-14 12:36:59,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:36:59,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:36:59,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:36:59,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:36:59,942 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-14 12:37:00,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:00,020 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-14 12:37:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:00,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-14 12:37:00,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:00,022 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:37:00,023 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:37:00,023 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 [2020-09-14 12:37:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:37:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-14 12:37:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:37:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-14 12:37:00,032 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-14 12:37:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:00,032 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-14 12:37:00,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:37:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-14 12:37:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:37:00,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:00,034 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:00,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:00,250 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-09-14 12:37:00,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:00,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419224884] [2020-09-14 12:37:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419224884] [2020-09-14 12:37:00,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586032105] [2020-09-14 12:37:00,405 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 [2020-09-14 12:37:00,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:00,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:00,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:00,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:00,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:00,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497427467] [2020-09-14 12:37:00,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:00,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:00,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:00,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:00,540 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-14 12:37:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:00,574 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-14 12:37:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-14 12:37:00,574 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:00,575 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:37:00,575 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:37:00,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:37:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-14 12:37:00,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:37:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-14 12:37:00,584 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-14 12:37:00,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:00,584 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-14 12:37:00,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:00,584 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-14 12:37:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:37:00,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:00,586 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:00,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:00,802 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-09-14 12:37:00,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:00,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450263186] [2020-09-14 12:37:00,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:00,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450263186] [2020-09-14 12:37:00,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178476825] [2020-09-14 12:37:00,921 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 [2020-09-14 12:37:00,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:00,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:00,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:01,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404678482] [2020-09-14 12:37:01,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:01,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:01,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:01,033 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-14 12:37:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:01,084 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-14 12:37:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:01,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:01,085 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:37:01,086 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:37:01,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:37:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:37:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-14 12:37:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:37:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-14 12:37:01,095 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-14 12:37:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:01,095 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-14 12:37:01,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-14 12:37:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-14 12:37:01,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:01,097 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:01,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:01,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-09-14 12:37:01,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:01,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199161386] [2020-09-14 12:37:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199161386] [2020-09-14 12:37:01,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370542345] [2020-09-14 12:37:01,453 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 [2020-09-14 12:37:01,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:01,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:37:01,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:01,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:01,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-14 12:37:01,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646253825] [2020-09-14 12:37:01,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:01,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:01,583 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-14 12:37:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:01,692 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-14 12:37:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:01,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-14 12:37:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:01,693 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:37:01,693 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:37:01,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:37:01,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-14 12:37:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:37:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-14 12:37:01,701 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-14 12:37:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:01,701 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-14 12:37:01,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-14 12:37:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:01,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:01,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:01,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:01,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:01,905 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-09-14 12:37:01,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:01,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841059889] [2020-09-14 12:37:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:01,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841059889] [2020-09-14 12:37:01,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:01,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:01,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333728896] [2020-09-14 12:37:01,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:01,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:01,984 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-14 12:37:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,017 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-14 12:37:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-14 12:37:02,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,019 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:37:02,019 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:37:02,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:37:02,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-14 12:37:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:37:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-14 12:37:02,026 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-14 12:37:02,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,027 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-14 12:37:02,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,027 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-14 12:37:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-14 12:37:02,029 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-09-14 12:37:02,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953839067] [2020-09-14 12:37:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953839067] [2020-09-14 12:37:02,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307919118] [2020-09-14 12:37:02,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,116 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-14 12:37:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,165 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-14 12:37:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:02,166 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,167 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:37:02,167 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:37:02,168 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 [2020-09-14 12:37:02,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:37:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-14 12:37:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:37:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-14 12:37:02,173 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-14 12:37:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,173 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-14 12:37:02,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-14 12:37:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-14 12:37:02,175 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,176 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-09-14 12:37:02,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788997386] [2020-09-14 12:37:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788997386] [2020-09-14 12:37:02,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784500007] [2020-09-14 12:37:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,242 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-14 12:37:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,314 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-14 12:37:02,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:02,315 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,316 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:37:02,316 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:37:02,317 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 [2020-09-14 12:37:02,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:37:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-14 12:37:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:37:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-14 12:37:02,321 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-14 12:37:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,322 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-14 12:37:02,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-14 12:37:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-14 12:37:02,323 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,324 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-09-14 12:37:02,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921208454] [2020-09-14 12:37:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921208454] [2020-09-14 12:37:02,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:37:02,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:37:02,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261354879] [2020-09-14 12:37:02,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:37:02,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:37:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:37:02,395 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-14 12:37:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,497 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-14 12:37:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:02,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:37:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,498 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:37:02,498 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:37:02,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:37:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-14 12:37:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:37:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-14 12:37:02,504 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-14 12:37:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,504 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-14 12:37:02,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:37:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-14 12:37:02,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,506 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:02,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-14 12:37:02,506 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-09-14 12:37:02,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:02,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652810502] [2020-09-14 12:37:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652810502] [2020-09-14 12:37:02,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374913537] [2020-09-14 12:37:02,589 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 [2020-09-14 12:37:02,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:02,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:02,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:02,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-14 12:37:02,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032278199] [2020-09-14 12:37:02,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:37:02,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:37:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:02,766 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-14 12:37:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:02,875 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-14 12:37:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:02,875 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-14 12:37:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:02,876 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:37:02,877 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:37:02,877 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 [2020-09-14 12:37:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:37:02,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-14 12:37:02,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:37:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-14 12:37:02,882 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-14 12:37:02,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:02,882 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-14 12:37:02,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:37:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-14 12:37:02,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:02,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:02,883 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:03,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:37:03,095 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:03,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-09-14 12:37:03,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:03,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588548998] [2020-09-14 12:37:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588548998] [2020-09-14 12:37:03,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42899761] [2020-09-14 12:37:03,194 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 [2020-09-14 12:37:03,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:03,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:03,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:03,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470258936] [2020-09-14 12:37:03,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:03,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:03,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:03,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,352 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-14 12:37:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:03,400 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-14 12:37:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:03,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:03,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:03,403 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:37:03,403 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:37:03,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:37:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-14 12:37:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-14 12:37:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-14 12:37:03,409 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-14 12:37:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:03,410 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-14 12:37:03,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-14 12:37:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:03,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:03,411 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:03,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:03,624 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:03,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:03,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-09-14 12:37:03,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:03,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684993410] [2020-09-14 12:37:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684993410] [2020-09-14 12:37:03,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741275286] [2020-09-14 12:37:03,738 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 [2020-09-14 12:37:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:03,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:03,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:03,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:03,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:03,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922719243] [2020-09-14 12:37:03,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:03,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:03,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:03,945 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-14 12:37:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:04,016 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-14 12:37:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:04,017 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:04,018 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:37:04,019 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:37:04,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:37:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-14 12:37:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:37:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-14 12:37:04,025 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-14 12:37:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:04,026 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-14 12:37:04,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:04,026 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-14 12:37:04,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:04,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:04,027 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:04,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:37:04,241 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:04,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-09-14 12:37:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:04,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453069081] [2020-09-14 12:37:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453069081] [2020-09-14 12:37:04,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316944062] [2020-09-14 12:37:04,320 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 [2020-09-14 12:37:04,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:04,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:04,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:04,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:04,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:04,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148881438] [2020-09-14 12:37:04,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:04,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:04,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:04,448 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-14 12:37:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:04,556 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-14 12:37:04,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:04,556 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:04,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:04,557 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:37:04,557 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:37:04,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:04,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:37:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-14 12:37:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:37:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-14 12:37:04,562 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-14 12:37:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-14 12:37:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-14 12:37:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:37:04,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:04,563 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:04,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:37:04,775 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:04,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-09-14 12:37:04,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:04,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278443378] [2020-09-14 12:37:04,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278443378] [2020-09-14 12:37:04,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707297925] [2020-09-14 12:37:04,853 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 [2020-09-14 12:37:04,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:04,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:04,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:04,970 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:04,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:04,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:04,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300983183] [2020-09-14 12:37:04,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:04,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:04,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:04,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:04,984 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-14 12:37:05,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:05,116 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-14 12:37:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:05,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-14 12:37:05,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:05,118 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:37:05,119 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:37:05,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:05,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:37:05,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-14 12:37:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:37:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-14 12:37:05,125 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-14 12:37:05,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:05,125 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-14 12:37:05,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-14 12:37:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:05,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:05,126 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:05,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:37:05,339 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:05,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:05,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-09-14 12:37:05,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:05,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014083127] [2020-09-14 12:37:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014083127] [2020-09-14 12:37:05,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453717512] [2020-09-14 12:37:05,435 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 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 [2020-09-14 12:37:05,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:05,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:05,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:05,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504458618] [2020-09-14 12:37:05,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:05,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:05,598 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-14 12:37:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:05,646 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-14 12:37:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:37:05,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:05,648 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:37:05,648 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:37:05,648 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 [2020-09-14 12:37:05,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:37:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-14 12:37:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-14 12:37:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-14 12:37:05,652 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-14 12:37:05,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:05,653 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-14 12:37:05,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-14 12:37:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:05,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:05,654 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:05,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:37:05,864 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:05,864 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-09-14 12:37:05,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:05,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919929955] [2020-09-14 12:37:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919929955] [2020-09-14 12:37:05,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19066263] [2020-09-14 12:37:05,944 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 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 [2020-09-14 12:37:05,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:05,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:05,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:05,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:06,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:06,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120634100] [2020-09-14 12:37:06,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:06,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:06,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:06,057 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-14 12:37:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:06,121 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-14 12:37:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:06,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:06,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:06,123 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:37:06,123 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:37:06,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:37:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-14 12:37:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-14 12:37:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-14 12:37:06,127 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-14 12:37:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:06,127 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-14 12:37:06,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-14 12:37:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:06,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:06,128 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:06,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:06,337 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:06,338 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-09-14 12:37:06,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:06,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710945660] [2020-09-14 12:37:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710945660] [2020-09-14 12:37:06,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395730731] [2020-09-14 12:37:06,423 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 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 [2020-09-14 12:37:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:06,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:06,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527234945] [2020-09-14 12:37:06,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:06,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:06,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:06,557 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-14 12:37:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:06,650 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-14 12:37:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:06,654 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:06,655 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:37:06,655 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:37:06,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:06,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:37:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-14 12:37:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-14 12:37:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-14 12:37:06,660 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-14 12:37:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:06,660 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-14 12:37:06,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-14 12:37:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:06,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:06,661 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:06,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:06,862 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:06,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:06,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-09-14 12:37:06,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:06,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690924567] [2020-09-14 12:37:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:06,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690924567] [2020-09-14 12:37:06,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109103699] [2020-09-14 12:37:06,989 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 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 [2020-09-14 12:37:07,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:07,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:07,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:07,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:07,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207806766] [2020-09-14 12:37:07,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:07,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:07,167 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-14 12:37:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:07,225 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-14 12:37:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:07,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:07,226 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:37:07,226 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:37:07,227 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 [2020-09-14 12:37:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:37:07,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-14 12:37:07,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-14 12:37:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-14 12:37:07,231 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-14 12:37:07,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:07,231 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-14 12:37:07,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:07,231 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-14 12:37:07,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:07,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:07,232 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:07,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-14 12:37:07,443 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-09-14 12:37:07,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:07,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102667841] [2020-09-14 12:37:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102667841] [2020-09-14 12:37:07,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167215273] [2020-09-14 12:37:07,529 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 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 [2020-09-14 12:37:07,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:07,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:07,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:07,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:07,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:07,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056653342] [2020-09-14 12:37:07,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:07,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:07,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:07,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:07,675 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:07,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:07,791 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-14 12:37:07,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:07,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:07,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:07,793 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:37:07,793 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:37:07,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:07,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:37:07,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-14 12:37:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-14 12:37:07,799 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-14 12:37:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:07,799 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-14 12:37:07,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:07,800 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-14 12:37:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:07,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:07,800 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:08,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:08,012 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-09-14 12:37:08,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:08,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913734899] [2020-09-14 12:37:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913734899] [2020-09-14 12:37:08,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201851341] [2020-09-14 12:37:08,094 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 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 [2020-09-14 12:37:08,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:08,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:08,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910655238] [2020-09-14 12:37:08,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:08,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:08,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:08,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:08,224 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-14 12:37:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:08,322 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-14 12:37:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:08,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:08,323 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:37:08,323 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:37:08,324 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 [2020-09-14 12:37:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:37:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-14 12:37:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-14 12:37:08,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-14 12:37:08,328 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-14 12:37:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:08,329 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-14 12:37:08,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:08,329 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-14 12:37:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:08,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:08,332 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:08,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:37:08,543 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:08,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-09-14 12:37:08,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:08,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113836626] [2020-09-14 12:37:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113836626] [2020-09-14 12:37:08,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040636844] [2020-09-14 12:37:08,663 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 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 [2020-09-14 12:37:08,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:08,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:08,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:08,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:08,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:08,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:08,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950978127] [2020-09-14 12:37:08,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:08,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:08,852 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-14 12:37:09,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:09,055 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-14 12:37:09,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:09,055 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:09,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:09,057 INFO L225 Difference]: With dead ends: 133 [2020-09-14 12:37:09,057 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:37:09,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:37:09,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-14 12:37:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-14 12:37:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-14 12:37:09,062 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-14 12:37:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:09,062 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-14 12:37:09,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-14 12:37:09,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:09,063 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:09,063 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:09,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:09,275 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-09-14 12:37:09,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:09,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803208110] [2020-09-14 12:37:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803208110] [2020-09-14 12:37:09,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021077524] [2020-09-14 12:37:09,345 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 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 [2020-09-14 12:37:09,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:09,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:09,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:09,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:09,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:09,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787319815] [2020-09-14 12:37:09,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:09,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:09,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:09,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:09,495 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:09,638 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-14 12:37:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:09,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:09,639 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:37:09,639 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:37:09,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:37:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-14 12:37:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-14 12:37:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-14 12:37:09,644 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-14 12:37:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:09,644 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-14 12:37:09,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-14 12:37:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:09,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:09,645 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:09,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:37:09,857 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:09,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-09-14 12:37:09,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:09,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832183113] [2020-09-14 12:37:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:09,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832183113] [2020-09-14 12:37:09,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819254995] [2020-09-14 12:37:09,929 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 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 [2020-09-14 12:37:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:10,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:10,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:10,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365337318] [2020-09-14 12:37:10,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:10,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:10,084 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-14 12:37:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:10,348 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-14 12:37:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:10,349 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:10,350 INFO L225 Difference]: With dead ends: 141 [2020-09-14 12:37:10,350 INFO L226 Difference]: Without dead ends: 136 [2020-09-14 12:37:10,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-14 12:37:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-14 12:37:10,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-14 12:37:10,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-14 12:37:10,355 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-14 12:37:10,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:10,356 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-14 12:37:10,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-14 12:37:10,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:10,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:10,357 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:10,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:37:10,569 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:10,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-09-14 12:37:10,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:10,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151801947] [2020-09-14 12:37:10,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151801947] [2020-09-14 12:37:10,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210354489] [2020-09-14 12:37:10,651 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 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 [2020-09-14 12:37:10,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:10,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:10,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:10,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:10,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:10,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:10,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:10,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10721737] [2020-09-14 12:37:10,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:10,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:10,853 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-14 12:37:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:11,064 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-14 12:37:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:11,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:11,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:11,066 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:37:11,066 INFO L226 Difference]: Without dead ends: 131 [2020-09-14 12:37:11,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-14 12:37:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-14 12:37:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-14 12:37:11,073 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-14 12:37:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:11,075 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-14 12:37:11,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-14 12:37:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:11,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:11,076 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:11,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-14 12:37:11,277 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-09-14 12:37:11,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:11,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543897496] [2020-09-14 12:37:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543897496] [2020-09-14 12:37:11,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91763217] [2020-09-14 12:37:11,371 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 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 [2020-09-14 12:37:11,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:11,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:11,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:11,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:11,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229075279] [2020-09-14 12:37:11,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:11,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:11,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:11,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:11,489 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-14 12:37:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:11,586 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-14 12:37:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:11,586 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:11,587 INFO L225 Difference]: With dead ends: 130 [2020-09-14 12:37:11,587 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:37:11,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:37:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-14 12:37:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-14 12:37:11,591 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-14 12:37:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:11,592 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-14 12:37:11,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-14 12:37:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:11,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:11,592 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:11,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:37:11,803 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:11,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-09-14 12:37:11,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:11,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805167139] [2020-09-14 12:37:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:11,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:11,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805167139] [2020-09-14 12:37:11,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764251981] [2020-09-14 12:37:11,872 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 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 [2020-09-14 12:37:11,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:11,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:11,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:12,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:12,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445774997] [2020-09-14 12:37:12,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:12,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:12,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:12,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:12,009 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-14 12:37:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:12,176 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-14 12:37:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:12,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:12,178 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:37:12,178 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:37:12,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:37:12,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-14 12:37:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-14 12:37:12,184 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-14 12:37:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:12,185 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-14 12:37:12,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-14 12:37:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:12,186 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:12,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:12,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:37:12,399 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:12,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:12,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-09-14 12:37:12,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:12,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138995030] [2020-09-14 12:37:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:12,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138995030] [2020-09-14 12:37:12,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293655123] [2020-09-14 12:37:12,480 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 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 [2020-09-14 12:37:12,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:12,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:12,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:12,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:12,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:12,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:12,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228253081] [2020-09-14 12:37:12,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:12,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:12,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:12,595 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:12,765 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-14 12:37:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:12,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:12,767 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:37:12,767 INFO L226 Difference]: Without dead ends: 126 [2020-09-14 12:37:12,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-14 12:37:12,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-14 12:37:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-14 12:37:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-14 12:37:12,776 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-14 12:37:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:12,776 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-14 12:37:12,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-14 12:37:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:12,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:12,778 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:12,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:12,993 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-09-14 12:37:12,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:12,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097556870] [2020-09-14 12:37:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097556870] [2020-09-14 12:37:13,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658898377] [2020-09-14 12:37:13,093 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 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 [2020-09-14 12:37:13,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:13,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:13,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:13,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:13,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647092699] [2020-09-14 12:37:13,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:13,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:13,275 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-14 12:37:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:13,497 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-14 12:37:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:13,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:13,500 INFO L225 Difference]: With dead ends: 145 [2020-09-14 12:37:13,500 INFO L226 Difference]: Without dead ends: 140 [2020-09-14 12:37:13,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-14 12:37:13,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-14 12:37:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-14 12:37:13,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-14 12:37:13,504 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-14 12:37:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:13,505 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-14 12:37:13,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-14 12:37:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:13,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:13,506 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:13,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-14 12:37:13,717 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:13,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-09-14 12:37:13,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:13,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596574013] [2020-09-14 12:37:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596574013] [2020-09-14 12:37:13,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143252048] [2020-09-14 12:37:13,790 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 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 [2020-09-14 12:37:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:37:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:13,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:13,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:13,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:13,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-14 12:37:13,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111987273] [2020-09-14 12:37:13,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:37:13,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:37:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:37:13,900 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-14 12:37:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:14,091 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-14 12:37:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:14,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-14 12:37:14,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:14,092 INFO L225 Difference]: With dead ends: 135 [2020-09-14 12:37:14,093 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:37:14,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:14,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:37:14,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-14 12:37:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-14 12:37:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-14 12:37:14,097 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-14 12:37:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:14,097 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-14 12:37:14,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:37:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-14 12:37:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:14,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:14,098 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:14,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:14,307 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-09-14 12:37:14,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:14,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810553302] [2020-09-14 12:37:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:14,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810553302] [2020-09-14 12:37:14,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208011679] [2020-09-14 12:37:14,412 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 [2020-09-14 12:37:14,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:14,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:14,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:14,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:14,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:14,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:14,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-14 12:37:14,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369196629] [2020-09-14 12:37:14,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:37:14,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:14,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:37:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:14,612 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-14 12:37:14,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:14,765 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-14 12:37:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:14,766 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-14 12:37:14,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:14,768 INFO L225 Difference]: With dead ends: 143 [2020-09-14 12:37:14,768 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:37:14,768 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 [2020-09-14 12:37:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:37:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-14 12:37:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-14 12:37:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-14 12:37:14,774 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-14 12:37:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:14,774 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-14 12:37:14,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:37:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-14 12:37:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:14,775 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:14,776 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:14,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-14 12:37:14,988 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-09-14 12:37:14,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:14,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089087281] [2020-09-14 12:37:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089087281] [2020-09-14 12:37:15,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564123113] [2020-09-14 12:37:15,102 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 [2020-09-14 12:37:15,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:15,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:15,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:15,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:15,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:15,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:15,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108459551] [2020-09-14 12:37:15,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:15,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,319 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-14 12:37:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:15,377 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-14 12:37:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:15,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:15,380 INFO L225 Difference]: With dead ends: 132 [2020-09-14 12:37:15,380 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:37:15,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:37:15,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-14 12:37:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-14 12:37:15,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-14 12:37:15,387 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-14 12:37:15,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:15,387 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-14 12:37:15,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:15,387 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-14 12:37:15,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:15,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:15,389 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:15,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:37:15,604 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-09-14 12:37:15,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:15,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342903431] [2020-09-14 12:37:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342903431] [2020-09-14 12:37:15,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255333833] [2020-09-14 12:37:15,706 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 [2020-09-14 12:37:15,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:15,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:15,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:15,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:15,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:15,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:15,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256462489] [2020-09-14 12:37:15,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:15,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:15,846 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-14 12:37:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:15,905 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-14 12:37:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:15,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:15,907 INFO L225 Difference]: With dead ends: 143 [2020-09-14 12:37:15,907 INFO L226 Difference]: Without dead ends: 140 [2020-09-14 12:37:15,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:37:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-14 12:37:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-14 12:37:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-14 12:37:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-14 12:37:15,911 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-14 12:37:15,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:15,911 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-14 12:37:15,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-14 12:37:15,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:15,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:15,912 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:16,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-14 12:37:16,123 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-09-14 12:37:16,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:16,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437755744] [2020-09-14 12:37:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437755744] [2020-09-14 12:37:16,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518338690] [2020-09-14 12:37:16,219 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 [2020-09-14 12:37:16,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:16,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:16,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:16,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:16,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32965455] [2020-09-14 12:37:16,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:16,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:16,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:16,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:16,359 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-14 12:37:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:16,435 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-14 12:37:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:16,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:16,437 INFO L225 Difference]: With dead ends: 142 [2020-09-14 12:37:16,437 INFO L226 Difference]: Without dead ends: 139 [2020-09-14 12:37:16,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:16,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-14 12:37:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-14 12:37:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-14 12:37:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-14 12:37:16,441 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-14 12:37:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:16,442 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-14 12:37:16,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:16,442 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-14 12:37:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:16,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:16,443 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:16,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:37:16,644 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:16,644 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-09-14 12:37:16,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:16,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477737665] [2020-09-14 12:37:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477737665] [2020-09-14 12:37:16,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561966274] [2020-09-14 12:37:16,732 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 [2020-09-14 12:37:16,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:16,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:16,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:16,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:16,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12615534] [2020-09-14 12:37:16,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:16,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:16,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:16,898 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-14 12:37:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:17,001 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-14 12:37:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:17,002 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:17,003 INFO L225 Difference]: With dead ends: 141 [2020-09-14 12:37:17,003 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:37:17,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:37:17,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-14 12:37:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-14 12:37:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-14 12:37:17,008 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-14 12:37:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:17,008 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-14 12:37:17,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:17,008 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-14 12:37:17,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:37:17,009 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:17,009 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:37:17,220 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-09-14 12:37:17,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:17,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183880629] [2020-09-14 12:37:17,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183880629] [2020-09-14 12:37:17,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86902958] [2020-09-14 12:37:17,308 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 [2020-09-14 12:37:17,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:17,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:17,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:17,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:17,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721624445] [2020-09-14 12:37:17,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:17,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:17,463 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-14 12:37:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:17,628 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-14 12:37:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:17,629 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-14 12:37:17,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:17,630 INFO L225 Difference]: With dead ends: 150 [2020-09-14 12:37:17,630 INFO L226 Difference]: Without dead ends: 144 [2020-09-14 12:37:17,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-14 12:37:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-14 12:37:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-14 12:37:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-14 12:37:17,635 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-14 12:37:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:17,636 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-14 12:37:17,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:17,636 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-14 12:37:17,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:17,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:17,637 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:17,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:17,849 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-09-14 12:37:17,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:17,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497148457] [2020-09-14 12:37:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:17,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497148457] [2020-09-14 12:37:17,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727315826] [2020-09-14 12:37:17,938 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 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 [2020-09-14 12:37:17,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:17,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:17,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:17,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:18,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:18,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038076600] [2020-09-14 12:37:18,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:18,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:18,090 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-14 12:37:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:18,151 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-14 12:37:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:37:18,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:18,153 INFO L225 Difference]: With dead ends: 138 [2020-09-14 12:37:18,153 INFO L226 Difference]: Without dead ends: 136 [2020-09-14 12:37:18,153 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 [2020-09-14 12:37:18,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-14 12:37:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-14 12:37:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-14 12:37:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-14 12:37:18,157 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-14 12:37:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:18,157 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-14 12:37:18,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-14 12:37:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:18,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:18,158 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:18,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:37:18,359 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:18,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:18,360 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-09-14 12:37:18,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:18,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685053089] [2020-09-14 12:37:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685053089] [2020-09-14 12:37:18,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275320621] [2020-09-14 12:37:18,455 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 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 [2020-09-14 12:37:18,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:18,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:18,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:18,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:18,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079581055] [2020-09-14 12:37:18,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:18,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:18,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:18,642 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-14 12:37:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:18,766 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-14 12:37:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:18,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:18,767 INFO L225 Difference]: With dead ends: 145 [2020-09-14 12:37:18,767 INFO L226 Difference]: Without dead ends: 143 [2020-09-14 12:37:18,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-14 12:37:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-14 12:37:18,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-14 12:37:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-14 12:37:18,771 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-14 12:37:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:18,772 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-14 12:37:18,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-14 12:37:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:18,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:18,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:18,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:37:18,983 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-09-14 12:37:18,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:18,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097342487] [2020-09-14 12:37:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:19,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097342487] [2020-09-14 12:37:19,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575921443] [2020-09-14 12:37:19,081 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 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 [2020-09-14 12:37:19,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:19,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:19,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:19,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:19,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668335627] [2020-09-14 12:37:19,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:19,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:19,234 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-14 12:37:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:19,383 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-14 12:37:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:19,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:19,385 INFO L225 Difference]: With dead ends: 150 [2020-09-14 12:37:19,386 INFO L226 Difference]: Without dead ends: 148 [2020-09-14 12:37:19,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-14 12:37:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-14 12:37:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-14 12:37:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-14 12:37:19,391 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-14 12:37:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:19,391 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-14 12:37:19,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:19,391 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-14 12:37:19,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:19,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:19,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:19,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:19,603 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-09-14 12:37:19,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:19,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298626845] [2020-09-14 12:37:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298626845] [2020-09-14 12:37:19,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546534525] [2020-09-14 12:37:19,722 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 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 [2020-09-14 12:37:19,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:19,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:19,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:19,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:19,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:19,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:19,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804842324] [2020-09-14 12:37:19,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:19,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:19,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:19,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:19,899 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:20,050 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-14 12:37:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:20,050 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:20,052 INFO L225 Difference]: With dead ends: 148 [2020-09-14 12:37:20,052 INFO L226 Difference]: Without dead ends: 146 [2020-09-14 12:37:20,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-14 12:37:20,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-14 12:37:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:20,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-14 12:37:20,056 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-14 12:37:20,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:20,056 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-14 12:37:20,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-14 12:37:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:20,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:20,058 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:20,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:37:20,267 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:20,268 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-09-14 12:37:20,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:20,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228252487] [2020-09-14 12:37:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:20,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228252487] [2020-09-14 12:37:20,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514159620] [2020-09-14 12:37:20,359 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 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 [2020-09-14 12:37:20,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:20,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:20,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:20,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042008210] [2020-09-14 12:37:20,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:20,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:20,540 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-14 12:37:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:20,695 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-14 12:37:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:20,695 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:20,697 INFO L225 Difference]: With dead ends: 149 [2020-09-14 12:37:20,697 INFO L226 Difference]: Without dead ends: 147 [2020-09-14 12:37:20,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-14 12:37:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-14 12:37:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-14 12:37:20,702 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-14 12:37:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:20,702 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-14 12:37:20,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-14 12:37:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:20,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:20,703 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:20,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:20,914 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-09-14 12:37:20,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:20,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073557197] [2020-09-14 12:37:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073557197] [2020-09-14 12:37:21,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520787536] [2020-09-14 12:37:21,039 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 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 [2020-09-14 12:37:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:21,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:21,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253195508] [2020-09-14 12:37:21,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:21,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:21,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:21,214 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-14 12:37:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:21,285 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-14 12:37:21,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:21,289 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:21,290 INFO L225 Difference]: With dead ends: 152 [2020-09-14 12:37:21,290 INFO L226 Difference]: Without dead ends: 150 [2020-09-14 12:37:21,291 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 [2020-09-14 12:37:21,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-14 12:37:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-14 12:37:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-14 12:37:21,294 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-14 12:37:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:21,295 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-14 12:37:21,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-14 12:37:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:21,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:21,295 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:21,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:37:21,497 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-09-14 12:37:21,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:21,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856462988] [2020-09-14 12:37:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856462988] [2020-09-14 12:37:21,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122809578] [2020-09-14 12:37:21,599 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 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 [2020-09-14 12:37:21,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:21,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:21,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:21,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:21,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028708273] [2020-09-14 12:37:21,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:21,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:21,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:21,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:21,762 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-14 12:37:21,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:21,932 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-14 12:37:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:21,933 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:21,934 INFO L225 Difference]: With dead ends: 153 [2020-09-14 12:37:21,935 INFO L226 Difference]: Without dead ends: 151 [2020-09-14 12:37:21,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-14 12:37:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-14 12:37:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-14 12:37:21,953 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-14 12:37:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:21,953 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-14 12:37:21,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:21,953 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-14 12:37:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:21,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:21,954 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:22,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-14 12:37:22,166 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:22,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-09-14 12:37:22,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:22,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262182471] [2020-09-14 12:37:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262182471] [2020-09-14 12:37:22,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404101637] [2020-09-14 12:37:22,265 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 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 [2020-09-14 12:37:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:22,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:22,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068404404] [2020-09-14 12:37:22,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:22,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:22,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:22,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:22,449 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-14 12:37:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:22,633 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:22,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:22,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:22,635 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:22,635 INFO L226 Difference]: Without dead ends: 154 [2020-09-14 12:37:22,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-14 12:37:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-14 12:37:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-14 12:37:22,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-14 12:37:22,640 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-14 12:37:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:22,640 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-14 12:37:22,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:22,641 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-14 12:37:22,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:22,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:22,641 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:22,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:37:22,843 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:22,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:22,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-09-14 12:37:22,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:22,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83017744] [2020-09-14 12:37:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:22,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:22,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83017744] [2020-09-14 12:37:22,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403778040] [2020-09-14 12:37:22,936 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 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 [2020-09-14 12:37:22,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:22,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:22,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:22,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:23,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:23,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265399121] [2020-09-14 12:37:23,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:23,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:23,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:23,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:23,105 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-14 12:37:23,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:23,194 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-14 12:37:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:23,195 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:23,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:23,196 INFO L225 Difference]: With dead ends: 148 [2020-09-14 12:37:23,196 INFO L226 Difference]: Without dead ends: 146 [2020-09-14 12:37:23,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:23,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-14 12:37:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-14 12:37:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-14 12:37:23,202 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-14 12:37:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:23,202 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-14 12:37:23,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-14 12:37:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:23,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:23,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:23,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-14 12:37:23,413 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:23,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-09-14 12:37:23,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:23,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417086392] [2020-09-14 12:37:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:23,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417086392] [2020-09-14 12:37:23,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8224598] [2020-09-14 12:37:23,496 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 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 [2020-09-14 12:37:23,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:23,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:23,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:23,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:23,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226970230] [2020-09-14 12:37:23,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:23,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:23,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:23,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:23,688 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:23,881 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-14 12:37:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:23,882 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:23,883 INFO L225 Difference]: With dead ends: 157 [2020-09-14 12:37:23,883 INFO L226 Difference]: Without dead ends: 155 [2020-09-14 12:37:23,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-14 12:37:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-14 12:37:23,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:23,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-14 12:37:23,889 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-14 12:37:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:23,890 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-14 12:37:23,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-14 12:37:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:23,891 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:24,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:24,101 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:24,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-09-14 12:37:24,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:24,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793337392] [2020-09-14 12:37:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793337392] [2020-09-14 12:37:24,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951815314] [2020-09-14 12:37:24,186 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 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 [2020-09-14 12:37:24,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:24,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:37:24,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:24,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:37:24,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365564984] [2020-09-14 12:37:24,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:37:24,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:24,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:37:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:37:24,269 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-14 12:37:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:24,379 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-14 12:37:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:24,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:37:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:24,381 INFO L225 Difference]: With dead ends: 149 [2020-09-14 12:37:24,381 INFO L226 Difference]: Without dead ends: 147 [2020-09-14 12:37:24,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:37:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-14 12:37:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-14 12:37:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:24,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:24,386 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:24,386 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:24,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:37:24,386 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:24,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:24,387 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:24,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:37:24,597 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-09-14 12:37:24,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:24,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946697721] [2020-09-14 12:37:24,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946697721] [2020-09-14 12:37:24,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668486765] [2020-09-14 12:37:24,680 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 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 [2020-09-14 12:37:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:24,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:24,852 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:24,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:24,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:24,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239699790] [2020-09-14 12:37:24,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:24,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:24,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:24,915 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:25,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:25,246 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-14 12:37:25,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:25,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:25,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:25,249 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:25,249 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:25,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-14 12:37:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:25,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-14 12:37:25,254 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-14 12:37:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:25,255 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-14 12:37:25,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-14 12:37:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:25,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:25,256 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:25,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:37:25,469 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:25,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-09-14 12:37:25,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:25,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222007282] [2020-09-14 12:37:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:25,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222007282] [2020-09-14 12:37:25,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54992170] [2020-09-14 12:37:25,556 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 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 [2020-09-14 12:37:25,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:25,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:25,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:25,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135697762] [2020-09-14 12:37:25,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:25,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:25,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:25,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:25,737 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:25,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:25,930 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:25,930 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:25,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:25,932 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:25,932 INFO L226 Difference]: Without dead ends: 154 [2020-09-14 12:37:25,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:25,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-14 12:37:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-14 12:37:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:25,937 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:25,937 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:25,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:25,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:25,938 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:26,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:26,142 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-09-14 12:37:26,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:26,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435327093] [2020-09-14 12:37:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:26,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435327093] [2020-09-14 12:37:26,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556282200] [2020-09-14 12:37:26,232 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 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 [2020-09-14 12:37:26,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:26,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:26,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:26,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:26,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:26,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:26,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039114900] [2020-09-14 12:37:26,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:26,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:26,422 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:26,827 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-14 12:37:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:26,828 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:26,829 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:26,830 INFO L226 Difference]: Without dead ends: 171 [2020-09-14 12:37:26,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:37:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-14 12:37:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-14 12:37:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-14 12:37:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-14 12:37:26,834 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-14 12:37:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:26,834 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-14 12:37:26,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-14 12:37:26,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:26,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:26,835 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:27,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-14 12:37:27,045 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-09-14 12:37:27,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:27,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630714779] [2020-09-14 12:37:27,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630714779] [2020-09-14 12:37:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379405994] [2020-09-14 12:37:27,124 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 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 [2020-09-14 12:37:27,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:27,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:27,305 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:27,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:27,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045012100] [2020-09-14 12:37:27,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:27,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:27,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:27,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:27,372 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-14 12:37:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:27,638 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-14 12:37:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:27,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:27,640 INFO L225 Difference]: With dead ends: 166 [2020-09-14 12:37:27,640 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:27,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:27,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-14 12:37:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-14 12:37:27,645 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-14 12:37:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:27,645 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-14 12:37:27,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-14 12:37:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:27,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:27,646 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:27,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:27,847 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:27,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-09-14 12:37:27,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:27,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739900944] [2020-09-14 12:37:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:27,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739900944] [2020-09-14 12:37:27,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278080236] [2020-09-14 12:37:27,937 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 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 [2020-09-14 12:37:27,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:28,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:28,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:28,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798818217] [2020-09-14 12:37:28,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:28,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:28,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:28,092 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-14 12:37:28,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:28,308 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-14 12:37:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:28,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:28,310 INFO L225 Difference]: With dead ends: 163 [2020-09-14 12:37:28,310 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:28,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-14 12:37:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-14 12:37:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-14 12:37:28,315 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-14 12:37:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:28,315 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-14 12:37:28,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-14 12:37:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:28,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:28,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:28,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:37:28,528 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:28,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:28,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-09-14 12:37:28,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:28,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463618478] [2020-09-14 12:37:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:28,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:28,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463618478] [2020-09-14 12:37:28,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128670536] [2020-09-14 12:37:28,606 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 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 [2020-09-14 12:37:28,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:28,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:28,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:28,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:28,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:28,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:28,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106211901] [2020-09-14 12:37:28,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:28,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:28,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:28,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:28,768 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:29,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:29,077 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-14 12:37:29,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:29,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:29,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:29,079 INFO L225 Difference]: With dead ends: 170 [2020-09-14 12:37:29,079 INFO L226 Difference]: Without dead ends: 168 [2020-09-14 12:37:29,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-14 12:37:29,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-14 12:37:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-14 12:37:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-14 12:37:29,084 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-14 12:37:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:29,084 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-14 12:37:29,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-14 12:37:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:29,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:29,085 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:29,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:29,295 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-09-14 12:37:29,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:29,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347536325] [2020-09-14 12:37:29,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:29,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347536325] [2020-09-14 12:37:29,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014112525] [2020-09-14 12:37:29,375 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 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 [2020-09-14 12:37:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:29,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:29,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:29,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:29,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:29,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784552384] [2020-09-14 12:37:29,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:29,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:29,544 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-14 12:37:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:29,945 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-14 12:37:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:29,946 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:29,947 INFO L225 Difference]: With dead ends: 177 [2020-09-14 12:37:29,948 INFO L226 Difference]: Without dead ends: 172 [2020-09-14 12:37:29,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:37:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-14 12:37:29,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-14 12:37:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-14 12:37:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-14 12:37:29,953 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-14 12:37:29,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:29,954 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-14 12:37:29,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-14 12:37:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:29,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:29,955 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:30,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:37:30,168 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:30,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-09-14 12:37:30,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:30,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778551848] [2020-09-14 12:37:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:30,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:30,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778551848] [2020-09-14 12:37:30,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956708275] [2020-09-14 12:37:30,250 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 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 [2020-09-14 12:37:30,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:30,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:30,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:30,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:30,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:30,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288859647] [2020-09-14 12:37:30,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:30,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:30,387 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-14 12:37:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:30,773 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-14 12:37:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:37:30,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:30,775 INFO L225 Difference]: With dead ends: 190 [2020-09-14 12:37:30,775 INFO L226 Difference]: Without dead ends: 182 [2020-09-14 12:37:30,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:37:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-14 12:37:30,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-14 12:37:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:30,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-14 12:37:30,780 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-14 12:37:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:30,780 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-14 12:37:30,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:30,781 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-14 12:37:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:30,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:30,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:30,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:37:30,991 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-09-14 12:37:30,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:30,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776721166] [2020-09-14 12:37:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776721166] [2020-09-14 12:37:31,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637675599] [2020-09-14 12:37:31,078 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 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 [2020-09-14 12:37:31,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:31,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:31,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:31,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:31,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:31,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376885444] [2020-09-14 12:37:31,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:31,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:31,243 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-14 12:37:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:31,683 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-14 12:37:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:31,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:31,685 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:37:31,685 INFO L226 Difference]: Without dead ends: 175 [2020-09-14 12:37:31,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:37:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-14 12:37:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-14 12:37:31,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-14 12:37:31,690 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-14 12:37:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:31,690 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-14 12:37:31,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-14 12:37:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:31,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:31,691 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:31,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:37:31,891 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-09-14 12:37:31,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:31,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110380184] [2020-09-14 12:37:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:31,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110380184] [2020-09-14 12:37:31,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751965413] [2020-09-14 12:37:31,979 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 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 [2020-09-14 12:37:32,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:32,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:32,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:32,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662904976] [2020-09-14 12:37:32,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:32,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:32,145 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-14 12:37:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:32,323 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-14 12:37:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:32,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:32,325 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:32,325 INFO L226 Difference]: Without dead ends: 162 [2020-09-14 12:37:32,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-14 12:37:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-14 12:37:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-14 12:37:32,330 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-14 12:37:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:32,330 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-14 12:37:32,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-14 12:37:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:32,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:32,331 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:32,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-14 12:37:32,542 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:32,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:32,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-09-14 12:37:32,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:32,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999772741] [2020-09-14 12:37:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999772741] [2020-09-14 12:37:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542575443] [2020-09-14 12:37:32,652 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 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 [2020-09-14 12:37:32,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:32,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:32,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:32,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:32,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:32,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729291353] [2020-09-14 12:37:32,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:32,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:32,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:32,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:32,825 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-14 12:37:33,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:33,011 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-14 12:37:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:33,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:33,013 INFO L225 Difference]: With dead ends: 161 [2020-09-14 12:37:33,013 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:33,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-14 12:37:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-14 12:37:33,017 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-14 12:37:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:33,017 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-14 12:37:33,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-14 12:37:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:33,018 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:33,018 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:33,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-14 12:37:33,228 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-09-14 12:37:33,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:33,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728555276] [2020-09-14 12:37:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728555276] [2020-09-14 12:37:33,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821097547] [2020-09-14 12:37:33,303 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 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 [2020-09-14 12:37:33,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:33,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:33,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:33,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:33,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:33,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:33,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576543439] [2020-09-14 12:37:33,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:33,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:33,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:33,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:33,492 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-14 12:37:33,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:33,749 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-14 12:37:33,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:33,750 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:33,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:33,751 INFO L225 Difference]: With dead ends: 165 [2020-09-14 12:37:33,752 INFO L226 Difference]: Without dead ends: 163 [2020-09-14 12:37:33,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:33,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-14 12:37:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-14 12:37:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:33,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-14 12:37:33,757 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-14 12:37:33,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:33,757 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-14 12:37:33,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-14 12:37:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:33,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:33,758 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:33,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-14 12:37:33,969 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:33,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:33,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-09-14 12:37:33,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:33,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130303083] [2020-09-14 12:37:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:33,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130303083] [2020-09-14 12:37:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092937078] [2020-09-14 12:37:34,055 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 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 [2020-09-14 12:37:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:34,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:34,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519620011] [2020-09-14 12:37:34,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:34,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:34,227 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-14 12:37:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:34,464 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-14 12:37:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:34,465 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:34,466 INFO L225 Difference]: With dead ends: 167 [2020-09-14 12:37:34,467 INFO L226 Difference]: Without dead ends: 165 [2020-09-14 12:37:34,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-14 12:37:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-14 12:37:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:34,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-14 12:37:34,471 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-14 12:37:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:34,471 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-14 12:37:34,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:34,471 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-14 12:37:34,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:34,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:34,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:34,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:34,682 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-09-14 12:37:34,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:34,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631499366] [2020-09-14 12:37:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631499366] [2020-09-14 12:37:34,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664133472] [2020-09-14 12:37:34,762 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 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 [2020-09-14 12:37:34,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:34,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:34,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:34,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:34,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:34,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122903609] [2020-09-14 12:37:34,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:34,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:34,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:34,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:34,942 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:35,266 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-14 12:37:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:35,266 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:35,268 INFO L225 Difference]: With dead ends: 168 [2020-09-14 12:37:35,268 INFO L226 Difference]: Without dead ends: 166 [2020-09-14 12:37:35,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-14 12:37:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-14 12:37:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-14 12:37:35,271 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-14 12:37:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:35,272 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-14 12:37:35,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-14 12:37:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:35,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:35,272 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:35,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:35,473 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:35,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-09-14 12:37:35,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:35,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204103502] [2020-09-14 12:37:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:35,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204103502] [2020-09-14 12:37:35,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058008901] [2020-09-14 12:37:35,559 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 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 [2020-09-14 12:37:35,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:35,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:35,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:35,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:35,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:35,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:35,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:35,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750540358] [2020-09-14 12:37:35,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:35,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:35,707 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:35,955 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-14 12:37:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:35,956 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:35,957 INFO L225 Difference]: With dead ends: 160 [2020-09-14 12:37:35,958 INFO L226 Difference]: Without dead ends: 155 [2020-09-14 12:37:35,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-14 12:37:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-14 12:37:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-14 12:37:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-14 12:37:35,962 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-14 12:37:35,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:35,963 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-14 12:37:35,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-14 12:37:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:35,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:35,963 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:36,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:36,174 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:36,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:36,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-09-14 12:37:36,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:36,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350974865] [2020-09-14 12:37:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:36,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350974865] [2020-09-14 12:37:36,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852777610] [2020-09-14 12:37:36,249 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 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 [2020-09-14 12:37:36,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:36,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:36,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:36,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:36,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039784458] [2020-09-14 12:37:36,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:36,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:36,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:36,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:36,436 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-14 12:37:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:36,864 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-14 12:37:36,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:36,865 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:36,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:36,866 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:37:36,866 INFO L226 Difference]: Without dead ends: 181 [2020-09-14 12:37:36,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:37:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-14 12:37:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-14 12:37:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-14 12:37:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-14 12:37:36,869 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-14 12:37:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:36,869 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-14 12:37:36,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-14 12:37:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:36,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:36,870 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:37,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:37,078 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-09-14 12:37:37,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:37,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492773566] [2020-09-14 12:37:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:37,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492773566] [2020-09-14 12:37:37,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957860693] [2020-09-14 12:37:37,158 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 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 [2020-09-14 12:37:37,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:37,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:37,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:37,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:37,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261423929] [2020-09-14 12:37:37,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:37,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:37,311 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-14 12:37:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:37,626 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-14 12:37:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:37:37,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:37,627 INFO L225 Difference]: With dead ends: 169 [2020-09-14 12:37:37,628 INFO L226 Difference]: Without dead ends: 167 [2020-09-14 12:37:37,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:37,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-14 12:37:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-14 12:37:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-14 12:37:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-14 12:37:37,631 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-14 12:37:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:37,631 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-14 12:37:37,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-14 12:37:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:37,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:37,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:37,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-14 12:37:37,836 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-09-14 12:37:37,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:37,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840616749] [2020-09-14 12:37:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:37,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840616749] [2020-09-14 12:37:37,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85277187] [2020-09-14 12:37:37,914 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 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 [2020-09-14 12:37:37,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:37,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:37,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:37,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:38,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:38,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:38,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:38,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883562295] [2020-09-14 12:37:38,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:38,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:38,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:38,063 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-14 12:37:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:38,487 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-14 12:37:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:37:38,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:38,490 INFO L225 Difference]: With dead ends: 192 [2020-09-14 12:37:38,490 INFO L226 Difference]: Without dead ends: 184 [2020-09-14 12:37:38,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:37:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-14 12:37:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-14 12:37:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-14 12:37:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-14 12:37:38,496 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-14 12:37:38,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:38,496 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-14 12:37:38,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-14 12:37:38,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:38,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:38,497 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:38,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:38,697 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:38,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:38,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-09-14 12:37:38,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:38,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540695627] [2020-09-14 12:37:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:38,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:38,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540695627] [2020-09-14 12:37:38,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404831141] [2020-09-14 12:37:38,774 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 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 [2020-09-14 12:37:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:38,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:37:38,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:38,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:38,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:38,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-14 12:37:38,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431201737] [2020-09-14 12:37:38,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:37:38,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:37:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:37:38,927 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-14 12:37:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:39,342 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-14 12:37:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:37:39,343 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-14 12:37:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:39,344 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:37:39,344 INFO L226 Difference]: Without dead ends: 175 [2020-09-14 12:37:39,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:37:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-14 12:37:39,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-14 12:37:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-14 12:37:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-14 12:37:39,347 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-14 12:37:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:39,348 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-14 12:37:39,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:37:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-14 12:37:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:39,348 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:39,348 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:39,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-14 12:37:39,551 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:39,552 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-09-14 12:37:39,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:39,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266082114] [2020-09-14 12:37:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:39,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266082114] [2020-09-14 12:37:39,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730483963] [2020-09-14 12:37:39,659 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 [2020-09-14 12:37:39,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:39,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:37:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:39,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:39,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-14 12:37:39,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935334175] [2020-09-14 12:37:39,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:37:39,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:39,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:37:39,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:39,876 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-14 12:37:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:40,063 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-14 12:37:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:40,064 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-14 12:37:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:40,065 INFO L225 Difference]: With dead ends: 164 [2020-09-14 12:37:40,065 INFO L226 Difference]: Without dead ends: 159 [2020-09-14 12:37:40,066 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 [2020-09-14 12:37:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-14 12:37:40,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-14 12:37:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-14 12:37:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-14 12:37:40,068 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-14 12:37:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:40,069 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-14 12:37:40,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:37:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-14 12:37:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:40,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:40,069 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:40,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:40,270 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-09-14 12:37:40,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:40,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131353600] [2020-09-14 12:37:40,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:40,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131353600] [2020-09-14 12:37:40,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401453718] [2020-09-14 12:37:40,431 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 [2020-09-14 12:37:40,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:40,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:40,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:40,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:40,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12457324] [2020-09-14 12:37:40,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:40,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:40,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:40,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:40,629 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-14 12:37:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:40,689 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-14 12:37:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:40,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:40,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:40,690 INFO L225 Difference]: With dead ends: 156 [2020-09-14 12:37:40,691 INFO L226 Difference]: Without dead ends: 153 [2020-09-14 12:37:40,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-14 12:37:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-14 12:37:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-14 12:37:40,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-14 12:37:40,694 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-14 12:37:40,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:40,694 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-14 12:37:40,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:40,694 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-14 12:37:40,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:40,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:40,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:40,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-14 12:37:40,903 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:40,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-09-14 12:37:40,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:40,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111337295] [2020-09-14 12:37:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111337295] [2020-09-14 12:37:41,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758768753] [2020-09-14 12:37:41,036 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 [2020-09-14 12:37:41,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:41,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:41,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:41,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:41,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718981131] [2020-09-14 12:37:41,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:41,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:41,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:41,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:41,242 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-14 12:37:41,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:41,326 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-14 12:37:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:41,327 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:41,328 INFO L225 Difference]: With dead ends: 170 [2020-09-14 12:37:41,328 INFO L226 Difference]: Without dead ends: 167 [2020-09-14 12:37:41,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:37:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-14 12:37:41,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-14 12:37:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-14 12:37:41,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-14 12:37:41,333 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-14 12:37:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:41,333 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-14 12:37:41,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:41,334 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-14 12:37:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:41,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:41,334 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:41,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:41,545 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:41,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-09-14 12:37:41,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:41,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659660099] [2020-09-14 12:37:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659660099] [2020-09-14 12:37:41,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749024897] [2020-09-14 12:37:41,674 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 [2020-09-14 12:37:41,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:41,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:41,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:41,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:41,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:41,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922523857] [2020-09-14 12:37:41,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:41,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:41,867 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-14 12:37:41,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:41,977 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-14 12:37:41,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:41,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:41,979 INFO L225 Difference]: With dead ends: 169 [2020-09-14 12:37:41,980 INFO L226 Difference]: Without dead ends: 166 [2020-09-14 12:37:41,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-14 12:37:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-14 12:37:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-14 12:37:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-14 12:37:41,983 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-14 12:37:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:41,983 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-14 12:37:41,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-14 12:37:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:41,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:41,983 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:42,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:42,185 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:42,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-09-14 12:37:42,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:42,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110961218] [2020-09-14 12:37:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110961218] [2020-09-14 12:37:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349598095] [2020-09-14 12:37:42,304 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 [2020-09-14 12:37:42,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:37:42,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:42,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:42,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:42,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526269656] [2020-09-14 12:37:42,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:42,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:42,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:42,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:42,504 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-14 12:37:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:42,629 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-14 12:37:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:42,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:42,632 INFO L225 Difference]: With dead ends: 168 [2020-09-14 12:37:42,632 INFO L226 Difference]: Without dead ends: 165 [2020-09-14 12:37:42,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:37:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-14 12:37:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-14 12:37:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-14 12:37:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-14 12:37:42,637 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-14 12:37:42,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:42,637 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-14 12:37:42,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:42,637 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-14 12:37:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:42,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:42,638 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:42,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-14 12:37:42,839 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-09-14 12:37:42,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:42,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349035972] [2020-09-14 12:37:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:42,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349035972] [2020-09-14 12:37:42,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698780746] [2020-09-14 12:37:42,957 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 [2020-09-14 12:37:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:43,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:43,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210118609] [2020-09-14 12:37:43,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:43,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:43,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:43,150 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-14 12:37:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:43,310 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-14 12:37:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:43,311 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:43,313 INFO L225 Difference]: With dead ends: 167 [2020-09-14 12:37:43,313 INFO L226 Difference]: Without dead ends: 164 [2020-09-14 12:37:43,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:43,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-14 12:37:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-14 12:37:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-14 12:37:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-14 12:37:43,316 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-14 12:37:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:43,316 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-14 12:37:43,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-14 12:37:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:37:43,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:43,317 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:43,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:43,518 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:43,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-09-14 12:37:43,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:43,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926274986] [2020-09-14 12:37:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926274986] [2020-09-14 12:37:43,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186101500] [2020-09-14 12:37:43,628 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 [2020-09-14 12:37:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:43,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:43,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:43,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:37:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:43,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:43,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:43,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308615554] [2020-09-14 12:37:43,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:43,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:43,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:43,827 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-14 12:37:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:44,098 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-14 12:37:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:44,099 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-14 12:37:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:44,101 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:44,101 INFO L226 Difference]: Without dead ends: 170 [2020-09-14 12:37:44,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:44,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-14 12:37:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-14 12:37:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-14 12:37:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-14 12:37:44,107 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-14 12:37:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:44,107 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-14 12:37:44,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-14 12:37:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:44,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:44,109 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:44,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:44,322 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:44,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:44,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-09-14 12:37:44,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:44,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100052465] [2020-09-14 12:37:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:44,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100052465] [2020-09-14 12:37:44,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224568057] [2020-09-14 12:37:44,471 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 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 [2020-09-14 12:37:44,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:44,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:44,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:44,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:44,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335789289] [2020-09-14 12:37:44,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:44,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:44,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:44,727 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-14 12:37:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:44,807 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-14 12:37:44,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:37:44,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:44,810 INFO L225 Difference]: With dead ends: 163 [2020-09-14 12:37:44,810 INFO L226 Difference]: Without dead ends: 161 [2020-09-14 12:37:44,810 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 [2020-09-14 12:37:44,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-14 12:37:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-14 12:37:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-14 12:37:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-14 12:37:44,815 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-14 12:37:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:44,816 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-14 12:37:44,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-14 12:37:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:44,817 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:44,817 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:45,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-14 12:37:45,029 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-09-14 12:37:45,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:45,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120262156] [2020-09-14 12:37:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:45,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120262156] [2020-09-14 12:37:45,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084027129] [2020-09-14 12:37:45,147 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 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 [2020-09-14 12:37:45,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:45,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:45,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:45,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:45,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:45,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505345143] [2020-09-14 12:37:45,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:45,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:45,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:45,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:45,355 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-14 12:37:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:45,537 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-14 12:37:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:45,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:45,540 INFO L225 Difference]: With dead ends: 172 [2020-09-14 12:37:45,540 INFO L226 Difference]: Without dead ends: 170 [2020-09-14 12:37:45,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:37:45,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-14 12:37:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-14 12:37:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-14 12:37:45,545 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-14 12:37:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:45,546 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-14 12:37:45,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-14 12:37:45,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:45,546 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:45,547 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:45,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:45,758 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:45,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-09-14 12:37:45,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:45,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203938831] [2020-09-14 12:37:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:45,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203938831] [2020-09-14 12:37:45,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61541057] [2020-09-14 12:37:45,878 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 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 [2020-09-14 12:37:45,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:45,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:45,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:45,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:46,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:46,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:46,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178874568] [2020-09-14 12:37:46,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:46,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:46,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:46,134 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-14 12:37:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:46,371 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-14 12:37:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:46,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:46,374 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:46,374 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:46,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-14 12:37:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-14 12:37:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-14 12:37:46,379 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-14 12:37:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:46,379 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-14 12:37:46,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-14 12:37:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:46,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:46,380 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:46,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-14 12:37:46,590 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:46,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-09-14 12:37:46,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:46,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373031276] [2020-09-14 12:37:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:46,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373031276] [2020-09-14 12:37:46,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609294019] [2020-09-14 12:37:46,707 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 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 [2020-09-14 12:37:46,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:46,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:46,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:46,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:46,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616681814] [2020-09-14 12:37:46,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:46,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:46,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:46,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:46,914 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-14 12:37:47,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:47,128 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-14 12:37:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:47,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:47,130 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:47,130 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:47,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-14 12:37:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:47,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-14 12:37:47,135 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-14 12:37:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:47,135 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-14 12:37:47,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-14 12:37:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:47,136 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:47,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:47,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-14 12:37:47,343 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:47,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:47,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-09-14 12:37:47,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:47,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940665169] [2020-09-14 12:37:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:47,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940665169] [2020-09-14 12:37:47,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629591164] [2020-09-14 12:37:47,461 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 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 [2020-09-14 12:37:47,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:47,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:47,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:47,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:47,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:47,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131956787] [2020-09-14 12:37:47,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:47,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:47,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:47,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:47,645 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-14 12:37:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:47,899 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-14 12:37:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:47,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:47,901 INFO L225 Difference]: With dead ends: 184 [2020-09-14 12:37:47,901 INFO L226 Difference]: Without dead ends: 182 [2020-09-14 12:37:47,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-14 12:37:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-14 12:37:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:37:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-14 12:37:47,905 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-14 12:37:47,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:47,905 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-14 12:37:47,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-14 12:37:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:47,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:47,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:48,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-14 12:37:48,107 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-09-14 12:37:48,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:48,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587648344] [2020-09-14 12:37:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:48,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587648344] [2020-09-14 12:37:48,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685215818] [2020-09-14 12:37:48,240 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 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 [2020-09-14 12:37:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:48,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:48,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:48,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:48,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118636847] [2020-09-14 12:37:48,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:48,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:48,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:48,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:48,440 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-14 12:37:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:48,704 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-14 12:37:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:48,705 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:48,707 INFO L225 Difference]: With dead ends: 179 [2020-09-14 12:37:48,707 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:37:48,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:37:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-14 12:37:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-14 12:37:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-14 12:37:48,711 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-14 12:37:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:48,711 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-14 12:37:48,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-14 12:37:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:48,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:48,712 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:48,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:48,919 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-09-14 12:37:48,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:48,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205277502] [2020-09-14 12:37:48,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205277502] [2020-09-14 12:37:49,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827195855] [2020-09-14 12:37:49,050 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 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 [2020-09-14 12:37:49,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:49,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:49,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:49,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190632526] [2020-09-14 12:37:49,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:49,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:49,241 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-14 12:37:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:49,442 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-14 12:37:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:49,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:49,444 INFO L225 Difference]: With dead ends: 176 [2020-09-14 12:37:49,445 INFO L226 Difference]: Without dead ends: 174 [2020-09-14 12:37:49,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:49,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-14 12:37:49,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-14 12:37:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:37:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-14 12:37:49,449 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-14 12:37:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:49,449 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-14 12:37:49,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-14 12:37:49,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:49,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:49,449 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:49,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:49,650 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:49,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:49,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-09-14 12:37:49,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:49,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956940470] [2020-09-14 12:37:49,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956940470] [2020-09-14 12:37:49,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610520659] [2020-09-14 12:37:49,781 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 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 [2020-09-14 12:37:49,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:37:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:49,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:49,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:49,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:49,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230945810] [2020-09-14 12:37:49,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:49,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:49,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:49,982 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-14 12:37:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:50,243 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-14 12:37:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:50,244 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:50,246 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:50,246 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:50,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-14 12:37:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-14 12:37:50,250 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-14 12:37:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:50,250 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-14 12:37:50,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-14 12:37:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:50,251 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:50,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:50,452 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:50,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-09-14 12:37:50,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:50,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435776527] [2020-09-14 12:37:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435776527] [2020-09-14 12:37:50,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124207073] [2020-09-14 12:37:50,582 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 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 [2020-09-14 12:37:50,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:50,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:50,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:50,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:50,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:50,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:50,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529205596] [2020-09-14 12:37:50,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:50,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:50,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:50,762 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-14 12:37:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:51,011 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-14 12:37:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:37:51,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:51,013 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:51,013 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:51,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:51,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-14 12:37:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-14 12:37:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-14 12:37:51,017 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-14 12:37:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:51,018 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-14 12:37:51,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-14 12:37:51,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:51,019 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:51,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:51,220 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:51,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-09-14 12:37:51,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:51,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640556176] [2020-09-14 12:37:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:51,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640556176] [2020-09-14 12:37:51,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452234613] [2020-09-14 12:37:51,412 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 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 [2020-09-14 12:37:51,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:51,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:51,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:51,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:51,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:51,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326172612] [2020-09-14 12:37:51,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:51,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:51,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:51,646 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-14 12:37:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:51,738 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-14 12:37:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:37:51,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:51,740 INFO L225 Difference]: With dead ends: 182 [2020-09-14 12:37:51,740 INFO L226 Difference]: Without dead ends: 180 [2020-09-14 12:37:51,740 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 [2020-09-14 12:37:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-14 12:37:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-14 12:37:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:37:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-14 12:37:51,746 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-14 12:37:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:51,746 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-14 12:37:51,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-14 12:37:51,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:51,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:51,748 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:51,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-14 12:37:51,959 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:51,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-09-14 12:37:51,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:51,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368840850] [2020-09-14 12:37:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368840850] [2020-09-14 12:37:52,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318433207] [2020-09-14 12:37:52,101 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 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 [2020-09-14 12:37:52,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:52,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:52,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:52,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:52,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:52,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197609520] [2020-09-14 12:37:52,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:52,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:52,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:52,295 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-14 12:37:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:52,507 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-14 12:37:52,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:37:52,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:52,509 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:37:52,510 INFO L226 Difference]: Without dead ends: 183 [2020-09-14 12:37:52,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:37:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-14 12:37:52,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-14 12:37:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-14 12:37:52,514 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-14 12:37:52,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:52,514 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-14 12:37:52,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:52,514 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-14 12:37:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:52,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:52,515 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:52,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:52,716 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:52,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-09-14 12:37:52,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:52,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977802583] [2020-09-14 12:37:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:52,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977802583] [2020-09-14 12:37:52,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135684373] [2020-09-14 12:37:52,849 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 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 [2020-09-14 12:37:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:52,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:53,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:53,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:53,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797021816] [2020-09-14 12:37:53,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:53,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:53,569 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-14 12:37:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:53,846 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-14 12:37:53,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:37:53,847 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:53,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:53,848 INFO L225 Difference]: With dead ends: 191 [2020-09-14 12:37:53,849 INFO L226 Difference]: Without dead ends: 189 [2020-09-14 12:37:53,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-14 12:37:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-14 12:37:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:53,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-14 12:37:53,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-14 12:37:53,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:53,858 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-14 12:37:53,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:53,858 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-14 12:37:53,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:53,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:53,858 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:54,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:54,059 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-09-14 12:37:54,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:54,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975698357] [2020-09-14 12:37:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:54,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975698357] [2020-09-14 12:37:54,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641481344] [2020-09-14 12:37:54,176 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 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 [2020-09-14 12:37:54,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:54,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:54,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:54,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:54,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:54,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694490036] [2020-09-14 12:37:54,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:54,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:54,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:54,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:54,375 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-14 12:37:54,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:54,665 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-14 12:37:54,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:54,666 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:54,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:54,668 INFO L225 Difference]: With dead ends: 187 [2020-09-14 12:37:54,668 INFO L226 Difference]: Without dead ends: 185 [2020-09-14 12:37:54,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-14 12:37:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-14 12:37:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-14 12:37:54,673 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-14 12:37:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:54,673 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-14 12:37:54,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-14 12:37:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:54,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:54,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:54,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-14 12:37:54,885 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-09-14 12:37:54,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:54,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006128690] [2020-09-14 12:37:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:55,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006128690] [2020-09-14 12:37:55,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120627347] [2020-09-14 12:37:55,007 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 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 [2020-09-14 12:37:55,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:55,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:55,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:55,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:55,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:55,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503674700] [2020-09-14 12:37:55,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:55,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:55,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:55,200 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-14 12:37:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:55,497 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-14 12:37:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:55,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:55,499 INFO L225 Difference]: With dead ends: 198 [2020-09-14 12:37:55,499 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:37:55,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:37:55,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-14 12:37:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:55,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-14 12:37:55,504 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-14 12:37:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:55,504 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-14 12:37:55,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-14 12:37:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:55,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:55,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:55,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:55,706 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:55,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-09-14 12:37:55,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:55,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954690037] [2020-09-14 12:37:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:55,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954690037] [2020-09-14 12:37:55,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094518143] [2020-09-14 12:37:55,823 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 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 [2020-09-14 12:37:55,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:37:55,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:56,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:56,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903234861] [2020-09-14 12:37:56,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:56,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:56,027 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-14 12:37:56,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:56,367 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-14 12:37:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:37:56,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:56,369 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:37:56,370 INFO L226 Difference]: Without dead ends: 187 [2020-09-14 12:37:56,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:37:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-14 12:37:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-14 12:37:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:37:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-14 12:37:56,373 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-14 12:37:56,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:56,374 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-14 12:37:56,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:56,374 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-14 12:37:56,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:56,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:56,375 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:56,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-14 12:37:56,583 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:56,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-09-14 12:37:56,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:56,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963107020] [2020-09-14 12:37:56,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963107020] [2020-09-14 12:37:56,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86777212] [2020-09-14 12:37:56,734 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 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 [2020-09-14 12:37:56,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:37:56,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:56,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:56,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:56,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:56,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:56,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:56,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434830655] [2020-09-14 12:37:56,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:56,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:56,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:56,924 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-14 12:37:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:57,045 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-14 12:37:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:37:57,046 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:57,047 INFO L225 Difference]: With dead ends: 178 [2020-09-14 12:37:57,048 INFO L226 Difference]: Without dead ends: 176 [2020-09-14 12:37:57,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:37:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-14 12:37:57,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-14 12:37:57,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:37:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-14 12:37:57,052 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-14 12:37:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:57,052 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-14 12:37:57,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-14 12:37:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:57,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:57,053 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:57,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:57,254 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:57,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:57,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-09-14 12:37:57,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:57,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758155354] [2020-09-14 12:37:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:57,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758155354] [2020-09-14 12:37:57,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945952529] [2020-09-14 12:37:57,384 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 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 [2020-09-14 12:37:57,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:37:57,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:57,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:57,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:57,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:57,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103586942] [2020-09-14 12:37:57,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:57,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:57,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:57,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:57,573 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-14 12:37:57,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:57,805 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-14 12:37:57,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:57,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:57,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:57,807 INFO L225 Difference]: With dead ends: 193 [2020-09-14 12:37:57,808 INFO L226 Difference]: Without dead ends: 191 [2020-09-14 12:37:57,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:37:57,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-14 12:37:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-14 12:37:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:37:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-14 12:37:57,811 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-14 12:37:57,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:57,812 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-14 12:37:57,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:57,812 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-14 12:37:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:57,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:57,812 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:58,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-14 12:37:58,015 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:58,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-09-14 12:37:58,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:58,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786973874] [2020-09-14 12:37:58,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786973874] [2020-09-14 12:37:58,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985517111] [2020-09-14 12:37:58,137 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 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 [2020-09-14 12:37:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:58,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:58,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:58,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681924866] [2020-09-14 12:37:58,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:58,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:58,401 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-14 12:37:58,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:58,722 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-14 12:37:58,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:37:58,723 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:58,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:58,724 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:37:58,725 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:37:58,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:37:58,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:37:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-14 12:37:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:37:58,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-14 12:37:58,728 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-14 12:37:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:58,729 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-14 12:37:58,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:58,729 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-14 12:37:58,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:58,729 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:58,729 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:58,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:37:58,930 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:58,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:58,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-09-14 12:37:58,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:58,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021813716] [2020-09-14 12:37:58,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021813716] [2020-09-14 12:37:59,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959852364] [2020-09-14 12:37:59,068 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 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 [2020-09-14 12:37:59,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:37:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:59,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:59,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:59,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231922336] [2020-09-14 12:37:59,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:59,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:59,239 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-14 12:37:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:37:59,376 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-14 12:37:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:37:59,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:37:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:37:59,378 INFO L225 Difference]: With dead ends: 174 [2020-09-14 12:37:59,378 INFO L226 Difference]: Without dead ends: 172 [2020-09-14 12:37:59,379 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 [2020-09-14 12:37:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-14 12:37:59,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-14 12:37:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:37:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-14 12:37:59,382 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-14 12:37:59,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:37:59,383 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-14 12:37:59,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:37:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-14 12:37:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:37:59,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:37:59,384 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:37:59,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-14 12:37:59,585 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:37:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:37:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-09-14 12:37:59,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:37:59,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139744250] [2020-09-14 12:37:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:37:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:37:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139744250] [2020-09-14 12:37:59,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813658593] [2020-09-14 12:37:59,699 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 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 [2020-09-14 12:37:59,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:37:59,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:37:59,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:37:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:37:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:37:59,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:37:59,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:37:59,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714711973] [2020-09-14 12:37:59,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:37:59,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:37:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:37:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:37:59,911 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-14 12:38:00,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:00,233 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-14 12:38:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:00,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:00,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:00,236 INFO L225 Difference]: With dead ends: 189 [2020-09-14 12:38:00,236 INFO L226 Difference]: Without dead ends: 187 [2020-09-14 12:38:00,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:38:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-14 12:38:00,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-14 12:38:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:38:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-14 12:38:00,240 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-14 12:38:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:00,240 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-14 12:38:00,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:00,240 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-14 12:38:00,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:00,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:00,241 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:00,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:00,442 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:00,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-09-14 12:38:00,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:00,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051152007] [2020-09-14 12:38:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051152007] [2020-09-14 12:38:00,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658520020] [2020-09-14 12:38:00,557 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 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 [2020-09-14 12:38:00,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:00,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:00,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:00,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:00,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:00,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:00,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234078898] [2020-09-14 12:38:00,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:00,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:00,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:00,750 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-14 12:38:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:00,915 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-14 12:38:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:38:00,916 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:00,918 INFO L225 Difference]: With dead ends: 175 [2020-09-14 12:38:00,918 INFO L226 Difference]: Without dead ends: 173 [2020-09-14 12:38:00,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:38:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-14 12:38:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-14 12:38:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:00,922 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:00,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:00,922 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:00,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:00,922 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:00,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:00,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:00,923 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:01,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:01,124 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-09-14 12:38:01,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:01,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720887564] [2020-09-14 12:38:01,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:01,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720887564] [2020-09-14 12:38:01,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343013672] [2020-09-14 12:38:01,215 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 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 [2020-09-14 12:38:01,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:01,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:01,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:01,396 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:01,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:01,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:01,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054989149] [2020-09-14 12:38:01,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:01,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:01,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:01,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:01,436 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:01,827 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-14 12:38:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:01,827 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:01,829 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:38:01,829 INFO L226 Difference]: Without dead ends: 190 [2020-09-14 12:38:01,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:38:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-14 12:38:01,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-14 12:38:01,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:01,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-14 12:38:01,833 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-14 12:38:01,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:01,833 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-14 12:38:01,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:01,833 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-14 12:38:01,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:01,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:01,834 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:02,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:02,034 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:02,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:02,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-09-14 12:38:02,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:02,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84609370] [2020-09-14 12:38:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:02,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84609370] [2020-09-14 12:38:02,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243946888] [2020-09-14 12:38:02,127 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 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 [2020-09-14 12:38:02,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:02,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:02,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:02,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:02,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:02,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333967911] [2020-09-14 12:38:02,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:02,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:02,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:02,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:02,328 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-14 12:38:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:02,631 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-14 12:38:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:38:02,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:02,633 INFO L225 Difference]: With dead ends: 187 [2020-09-14 12:38:02,633 INFO L226 Difference]: Without dead ends: 185 [2020-09-14 12:38:02,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-14 12:38:02,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-14 12:38:02,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:02,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:02,636 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:02,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:02,637 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:02,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:02,637 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:02,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:02,637 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:02,637 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:02,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:02,838 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-09-14 12:38:02,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:02,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635488130] [2020-09-14 12:38:02,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:02,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635488130] [2020-09-14 12:38:02,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515947690] [2020-09-14 12:38:02,948 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 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 [2020-09-14 12:38:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:02,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:03,131 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:03,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:03,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:03,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395655880] [2020-09-14 12:38:03,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:03,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:03,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:03,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:03,178 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:03,726 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-14 12:38:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:38:03,727 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:03,728 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:38:03,729 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:38:03,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:38:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-14 12:38:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:03,732 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:03,732 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:03,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:03,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:03,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:03,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-14 12:38:03,936 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-09-14 12:38:03,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:03,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390984031] [2020-09-14 12:38:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:04,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390984031] [2020-09-14 12:38:04,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674290153] [2020-09-14 12:38:04,040 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 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 [2020-09-14 12:38:04,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:04,215 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:04,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:04,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:04,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152180861] [2020-09-14 12:38:04,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:04,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:04,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:04,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:04,244 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:04,634 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-14 12:38:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:04,635 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:04,636 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:38:04,637 INFO L226 Difference]: Without dead ends: 197 [2020-09-14 12:38:04,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:38:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-14 12:38:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-14 12:38:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:38:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-14 12:38:04,641 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-14 12:38:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:04,641 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-14 12:38:04,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:04,641 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-14 12:38:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:04,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:04,642 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:04,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:04,843 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:04,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:04,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-09-14 12:38:04,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:04,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299126103] [2020-09-14 12:38:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:04,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299126103] [2020-09-14 12:38:04,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238156178] [2020-09-14 12:38:04,946 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 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 [2020-09-14 12:38:04,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:04,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:04,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:05,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:05,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:05,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921138511] [2020-09-14 12:38:05,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:05,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:05,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:05,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:05,687 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-14 12:38:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:06,038 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-14 12:38:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:06,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:06,040 INFO L225 Difference]: With dead ends: 198 [2020-09-14 12:38:06,040 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:38:06,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:06,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:38:06,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-14 12:38:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:06,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-14 12:38:06,044 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-14 12:38:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:06,045 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-14 12:38:06,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-14 12:38:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:06,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:06,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:06,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-14 12:38:06,254 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:06,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-09-14 12:38:06,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:06,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254302525] [2020-09-14 12:38:06,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:06,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254302525] [2020-09-14 12:38:06,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868007480] [2020-09-14 12:38:06,352 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 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 [2020-09-14 12:38:06,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:06,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:06,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:06,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:06,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:06,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:06,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304025160] [2020-09-14 12:38:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:06,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:06,674 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-14 12:38:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:07,177 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-14 12:38:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:38:07,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:07,180 INFO L225 Difference]: With dead ends: 209 [2020-09-14 12:38:07,180 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:38:07,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:38:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:38:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-14 12:38:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-14 12:38:07,185 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-14 12:38:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:07,185 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-14 12:38:07,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-14 12:38:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:07,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:07,185 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:07,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-14 12:38:07,386 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:07,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:07,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-09-14 12:38:07,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:07,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966001729] [2020-09-14 12:38:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:07,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966001729] [2020-09-14 12:38:07,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382539243] [2020-09-14 12:38:07,491 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 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 [2020-09-14 12:38:07,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:07,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:07,678 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:07,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:07,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:07,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985692172] [2020-09-14 12:38:07,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:07,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:07,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:07,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:07,723 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-14 12:38:08,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:08,380 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-14 12:38:08,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:08,381 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:08,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:08,383 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:38:08,383 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:38:08,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:38:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:38:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-14 12:38:08,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:38:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-14 12:38:08,387 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-14 12:38:08,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:08,388 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-14 12:38:08,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:08,388 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-14 12:38:08,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:08,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:08,389 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:08,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-14 12:38:08,596 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:08,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:08,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-09-14 12:38:08,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:08,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233509925] [2020-09-14 12:38:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:08,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233509925] [2020-09-14 12:38:08,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100273292] [2020-09-14 12:38:08,701 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 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 [2020-09-14 12:38:08,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:08,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:08,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:08,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:10,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:10,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:10,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:10,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525321434] [2020-09-14 12:38:10,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:10,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-14 12:38:10,971 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-14 12:38:15,304 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:38:19,547 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-14 12:38:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:20,017 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-14 12:38:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:38:20,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:20,019 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:38:20,019 INFO L226 Difference]: Without dead ends: 228 [2020-09-14 12:38:20,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-14 12:38:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-14 12:38:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-14 12:38:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:38:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-14 12:38:20,023 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-14 12:38:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:20,023 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-14 12:38:20,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-14 12:38:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:20,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:20,024 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:20,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-14 12:38:20,234 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:20,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:20,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-09-14 12:38:20,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:20,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167244714] [2020-09-14 12:38:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:20,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167244714] [2020-09-14 12:38:20,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914900877] [2020-09-14 12:38:20,343 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 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 [2020-09-14 12:38:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:20,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:20,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:20,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:20,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:20,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:20,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:20,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816775669] [2020-09-14 12:38:20,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:20,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:20,579 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-14 12:38:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:21,235 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-14 12:38:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:21,236 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:21,237 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:38:21,237 INFO L226 Difference]: Without dead ends: 214 [2020-09-14 12:38:21,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:38:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-14 12:38:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-14 12:38:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:38:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-14 12:38:21,240 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-14 12:38:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:21,241 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-14 12:38:21,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-14 12:38:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:21,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:21,241 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:21,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:21,443 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:21,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:21,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-09-14 12:38:21,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:21,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823834405] [2020-09-14 12:38:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823834405] [2020-09-14 12:38:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308336193] [2020-09-14 12:38:21,547 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 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 [2020-09-14 12:38:21,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:21,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:21,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:21,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054189402] [2020-09-14 12:38:21,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:21,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:21,755 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-14 12:38:22,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:22,073 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-14 12:38:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:22,074 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:22,075 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:38:22,075 INFO L226 Difference]: Without dead ends: 195 [2020-09-14 12:38:22,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-14 12:38:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-14 12:38:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-14 12:38:22,079 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-14 12:38:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:22,079 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-14 12:38:22,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-14 12:38:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:22,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:22,080 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:22,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:22,283 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:22,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:22,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-09-14 12:38:22,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:22,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676954110] [2020-09-14 12:38:22,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:22,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:22,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676954110] [2020-09-14 12:38:22,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247260710] [2020-09-14 12:38:22,374 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 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 [2020-09-14 12:38:22,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:22,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:22,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:22,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:22,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340242641] [2020-09-14 12:38:22,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:22,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:22,564 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-14 12:38:22,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:22,896 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-14 12:38:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:22,897 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:22,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:22,898 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:38:22,898 INFO L226 Difference]: Without dead ends: 200 [2020-09-14 12:38:22,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-14 12:38:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-14 12:38:22,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-14 12:38:22,901 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-14 12:38:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:22,902 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-14 12:38:22,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:22,902 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-14 12:38:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:22,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:22,902 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:23,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-14 12:38:23,103 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-09-14 12:38:23,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:23,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766348750] [2020-09-14 12:38:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:23,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766348750] [2020-09-14 12:38:23,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747751445] [2020-09-14 12:38:23,214 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 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 [2020-09-14 12:38:23,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:23,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:23,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:23,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:23,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:23,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:23,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851793812] [2020-09-14 12:38:23,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:23,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:23,439 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-14 12:38:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:23,784 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-14 12:38:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:38:23,785 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:23,786 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:38:23,786 INFO L226 Difference]: Without dead ends: 195 [2020-09-14 12:38:23,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-14 12:38:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-14 12:38:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:23,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-14 12:38:23,790 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-14 12:38:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:23,790 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-14 12:38:23,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-14 12:38:23,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:23,790 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:23,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:23,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-14 12:38:23,995 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:23,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:23,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-09-14 12:38:23,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:23,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017590010] [2020-09-14 12:38:23,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:24,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:24,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017590010] [2020-09-14 12:38:24,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485435958] [2020-09-14 12:38:24,085 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 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 [2020-09-14 12:38:24,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:24,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:24,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:24,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:24,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:24,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811073114] [2020-09-14 12:38:24,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:24,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:24,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:24,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:24,346 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-14 12:38:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:24,920 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-14 12:38:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:38:24,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:24,922 INFO L225 Difference]: With dead ends: 214 [2020-09-14 12:38:24,922 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:38:24,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:24,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:38:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-14 12:38:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:38:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-14 12:38:24,926 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-14 12:38:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:24,926 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-14 12:38:24,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-14 12:38:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:24,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:24,927 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:25,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-14 12:38:25,134 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:25,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:25,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-09-14 12:38:25,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:25,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804253526] [2020-09-14 12:38:25,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:25,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804253526] [2020-09-14 12:38:25,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350721065] [2020-09-14 12:38:25,243 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 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 [2020-09-14 12:38:25,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:25,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:25,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:25,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:25,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:25,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:25,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433163297] [2020-09-14 12:38:25,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:25,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:25,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:25,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:25,433 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-14 12:38:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:25,919 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-14 12:38:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:25,920 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:25,921 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:38:25,921 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:38:25,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:38:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:38:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-14 12:38:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-14 12:38:25,925 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-14 12:38:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:25,925 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-14 12:38:25,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-14 12:38:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:25,926 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:25,926 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:26,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:26,127 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:26,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:26,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-09-14 12:38:26,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:26,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646084985] [2020-09-14 12:38:26,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:26,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646084985] [2020-09-14 12:38:26,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036917643] [2020-09-14 12:38:26,239 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 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 [2020-09-14 12:38:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:26,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:26,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:26,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784605774] [2020-09-14 12:38:26,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:26,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:26,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:26,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:26,431 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-14 12:38:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:26,934 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-14 12:38:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:38:26,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:26,936 INFO L225 Difference]: With dead ends: 211 [2020-09-14 12:38:26,936 INFO L226 Difference]: Without dead ends: 209 [2020-09-14 12:38:26,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-14 12:38:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-14 12:38:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:26,940 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:26,940 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:26,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:26,941 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:26,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:26,941 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:27,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:27,142 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:27,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-09-14 12:38:27,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:27,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9692641] [2020-09-14 12:38:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:27,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9692641] [2020-09-14 12:38:27,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967391849] [2020-09-14 12:38:27,249 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 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 [2020-09-14 12:38:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:27,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:27,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:27,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:27,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:27,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582075091] [2020-09-14 12:38:27,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:27,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:27,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:27,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:27,447 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:28,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:28,025 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-14 12:38:28,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:38:28,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:28,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:28,026 INFO L225 Difference]: With dead ends: 211 [2020-09-14 12:38:28,027 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:38:28,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:38:28,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:38:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-14 12:38:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:28,031 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:28,031 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:28,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:28,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:28,031 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:28,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-14 12:38:28,232 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:28,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-09-14 12:38:28,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:28,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617288187] [2020-09-14 12:38:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:28,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:28,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617288187] [2020-09-14 12:38:28,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627631078] [2020-09-14 12:38:28,343 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 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 [2020-09-14 12:38:28,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:38:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:28,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:28,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:28,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:28,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588982222] [2020-09-14 12:38:28,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:28,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:28,565 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:29,289 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-14 12:38:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:38:29,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:29,291 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:38:29,291 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:38:29,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:38:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:38:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-14 12:38:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-14 12:38:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-14 12:38:29,295 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-14 12:38:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:29,295 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-14 12:38:29,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-14 12:38:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:29,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:29,296 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:29,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-14 12:38:29,496 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-09-14 12:38:29,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:29,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638908582] [2020-09-14 12:38:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:29,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:29,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638908582] [2020-09-14 12:38:29,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950462711] [2020-09-14 12:38:29,601 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 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 [2020-09-14 12:38:29,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:38:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:29,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:29,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:29,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836854129] [2020-09-14 12:38:29,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:29,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:29,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:29,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:29,795 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-14 12:38:30,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:30,378 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-14 12:38:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:38:30,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:30,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:30,380 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:38:30,380 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:38:30,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:38:30,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:38:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-14 12:38:30,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-14 12:38:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-14 12:38:30,384 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-14 12:38:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:30,384 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-14 12:38:30,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-14 12:38:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:30,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:30,385 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:30,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:30,588 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-09-14 12:38:30,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:30,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515091661] [2020-09-14 12:38:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:30,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:30,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515091661] [2020-09-14 12:38:30,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771762249] [2020-09-14 12:38:30,684 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 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 [2020-09-14 12:38:30,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:38:30,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:30,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:38:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:30,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:30,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:30,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918298346] [2020-09-14 12:38:30,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:30,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:30,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:30,867 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-14 12:38:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:31,583 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-14 12:38:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:38:31,584 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:31,585 INFO L225 Difference]: With dead ends: 240 [2020-09-14 12:38:31,586 INFO L226 Difference]: Without dead ends: 232 [2020-09-14 12:38:31,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:38:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-14 12:38:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-14 12:38:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:38:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-14 12:38:31,590 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-14 12:38:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:31,591 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-14 12:38:31,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-14 12:38:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:31,591 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:31,591 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:31,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-14 12:38:31,801 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:31,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:31,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-09-14 12:38:31,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:31,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970484986] [2020-09-14 12:38:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:31,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970484986] [2020-09-14 12:38:31,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208207327] [2020-09-14 12:38:31,903 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 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 [2020-09-14 12:38:31,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:38:31,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:31,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:31,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:32,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:32,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:32,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:32,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548573644] [2020-09-14 12:38:32,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:32,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:32,145 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-14 12:38:32,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:32,894 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-14 12:38:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:38:32,895 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:32,896 INFO L225 Difference]: With dead ends: 238 [2020-09-14 12:38:32,896 INFO L226 Difference]: Without dead ends: 230 [2020-09-14 12:38:32,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:38:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-14 12:38:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-14 12:38:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-14 12:38:32,899 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-14 12:38:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:32,899 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-14 12:38:32,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-14 12:38:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:32,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:32,900 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:33,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:33,108 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:33,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:33,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-09-14 12:38:33,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:33,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725214511] [2020-09-14 12:38:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725214511] [2020-09-14 12:38:33,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783510780] [2020-09-14 12:38:33,220 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 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 [2020-09-14 12:38:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:33,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:33,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:33,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248998615] [2020-09-14 12:38:33,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:33,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:33,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:33,426 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-14 12:38:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:33,736 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-14 12:38:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:38:33,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:33,738 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:38:33,738 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:38:33,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:38:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:38:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-14 12:38:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:38:33,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-14 12:38:33,742 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-14 12:38:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:33,742 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-14 12:38:33,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-14 12:38:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:33,743 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:33,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-14 12:38:33,944 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-09-14 12:38:33,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:33,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098723] [2020-09-14 12:38:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:34,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098723] [2020-09-14 12:38:34,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200566236] [2020-09-14 12:38:34,054 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 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 [2020-09-14 12:38:34,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:38:34,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:34,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:34,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:34,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:34,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:38:34,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795694209] [2020-09-14 12:38:34,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:38:34,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:34,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:38:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:38:34,263 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-14 12:38:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:38:34,844 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-14 12:38:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:38:34,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:38:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:38:34,846 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:38:34,846 INFO L226 Difference]: Without dead ends: 204 [2020-09-14 12:38:34,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:38:34,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-14 12:38:34,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-14 12:38:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-14 12:38:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-14 12:38:34,850 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-14 12:38:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:38:34,851 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-14 12:38:34,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:38:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-14 12:38:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:38:34,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:38:34,851 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:38:35,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:38:35,052 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:38:35,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:38:35,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-09-14 12:38:35,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:38:35,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901587809] [2020-09-14 12:38:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:38:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:38:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:35,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901587809] [2020-09-14 12:38:35,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492722729] [2020-09-14 12:38:35,163 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 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 [2020-09-14 12:38:35,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:38:35,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:38:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:38:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:38:35,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:38:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:38:37,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:38:37,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-14 12:38:37,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048456356] [2020-09-14 12:38:37,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:38:37,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:38:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:38:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-14 12:38:37,469 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-14 12:38:39,961 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-14 12:39:02,829 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-14 12:39:29,972 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-14 12:39:50,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:50,710 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-14 12:39:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:39:50,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-14 12:39:50,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:50,712 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:39:50,712 INFO L226 Difference]: Without dead ends: 247 [2020-09-14 12:39:50,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 31.3s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-14 12:39:50,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-14 12:39:50,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-14 12:39:50,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:39:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-14 12:39:50,716 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-14 12:39:50,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:50,716 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-14 12:39:50,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:39:50,716 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-14 12:39:50,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:50,716 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:50,716 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:50,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-14 12:39:50,917 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-09-14 12:39:50,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:50,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591131396] [2020-09-14 12:39:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:51,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591131396] [2020-09-14 12:39:51,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411367705] [2020-09-14 12:39:51,042 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 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 [2020-09-14 12:39:51,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:39:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:51,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:51,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:51,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:51,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809745547] [2020-09-14 12:39:51,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:51,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:51,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:51,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:51,248 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-14 12:39:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:51,517 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-14 12:39:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:39:51,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:51,519 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:39:51,519 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:39:51,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:39:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:39:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-14 12:39:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:39:51,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-14 12:39:51,523 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-14 12:39:51,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:51,523 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-14 12:39:51,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:51,523 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-14 12:39:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:51,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:51,524 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:51,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:51,724 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:51,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-09-14 12:39:51,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:51,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609550779] [2020-09-14 12:39:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:51,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609550779] [2020-09-14 12:39:51,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635921224] [2020-09-14 12:39:51,848 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 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 [2020-09-14 12:39:51,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:39:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:51,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:52,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:52,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:52,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623662325] [2020-09-14 12:39:52,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:52,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:52,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:52,058 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-14 12:39:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:52,433 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-14 12:39:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:39:52,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:52,434 INFO L225 Difference]: With dead ends: 205 [2020-09-14 12:39:52,435 INFO L226 Difference]: Without dead ends: 203 [2020-09-14 12:39:52,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:39:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-14 12:39:52,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-14 12:39:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:39:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-14 12:39:52,438 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-14 12:39:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:52,439 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-14 12:39:52,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-14 12:39:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:52,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:52,439 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:52,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:52,640 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:52,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-09-14 12:39:52,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:52,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195392422] [2020-09-14 12:39:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:52,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195392422] [2020-09-14 12:39:52,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257914891] [2020-09-14 12:39:52,764 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 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 [2020-09-14 12:39:52,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:39:52,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:52,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:52,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:52,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:52,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072035012] [2020-09-14 12:39:52,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:52,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:52,961 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-14 12:39:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:53,282 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-14 12:39:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:39:53,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:53,284 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:39:53,284 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:39:53,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:39:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:39:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-14 12:39:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:39:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-14 12:39:53,289 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-14 12:39:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:53,289 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-14 12:39:53,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-14 12:39:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:53,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:53,290 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:53,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:53,498 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:53,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-09-14 12:39:53,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:53,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227686390] [2020-09-14 12:39:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:53,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:53,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227686390] [2020-09-14 12:39:53,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773991976] [2020-09-14 12:39:53,594 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 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 [2020-09-14 12:39:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:53,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:53,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:53,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616240028] [2020-09-14 12:39:53,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:53,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:53,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:53,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:53,806 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-14 12:39:54,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:54,104 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-14 12:39:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:39:54,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:54,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:54,106 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:39:54,106 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:39:54,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:39:54,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:39:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-14 12:39:54,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:39:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-14 12:39:54,110 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-14 12:39:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:54,110 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-14 12:39:54,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-14 12:39:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:54,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:54,111 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:54,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-14 12:39:54,311 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:54,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:54,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-09-14 12:39:54,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:54,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341575042] [2020-09-14 12:39:54,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:54,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341575042] [2020-09-14 12:39:54,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093888718] [2020-09-14 12:39:54,424 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 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 [2020-09-14 12:39:54,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:39:54,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:54,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:54,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934104912] [2020-09-14 12:39:54,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:54,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:54,650 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-14 12:39:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:55,062 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-14 12:39:55,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:39:55,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:55,064 INFO L225 Difference]: With dead ends: 209 [2020-09-14 12:39:55,064 INFO L226 Difference]: Without dead ends: 207 [2020-09-14 12:39:55,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:39:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-14 12:39:55,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-14 12:39:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-14 12:39:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-14 12:39:55,068 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-14 12:39:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:55,069 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-14 12:39:55,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-14 12:39:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:55,069 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:55,069 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:55,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:55,271 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-09-14 12:39:55,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:55,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082500234] [2020-09-14 12:39:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:55,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082500234] [2020-09-14 12:39:55,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926262732] [2020-09-14 12:39:55,372 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 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 [2020-09-14 12:39:55,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:39:55,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:55,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:55,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:55,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:55,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:55,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403808266] [2020-09-14 12:39:55,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:55,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:55,602 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-14 12:39:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:56,000 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-14 12:39:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:39:56,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:56,002 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:39:56,002 INFO L226 Difference]: Without dead ends: 200 [2020-09-14 12:39:56,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:39:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-14 12:39:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-14 12:39:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:39:56,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-14 12:39:56,005 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-14 12:39:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:56,005 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-14 12:39:56,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-14 12:39:56,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:56,006 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:56,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:56,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-14 12:39:56,207 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:56,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:56,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-09-14 12:39:56,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:56,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676282879] [2020-09-14 12:39:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:56,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676282879] [2020-09-14 12:39:56,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588689181] [2020-09-14 12:39:56,317 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 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 [2020-09-14 12:39:56,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:39:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:56,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:56,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:56,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912557280] [2020-09-14 12:39:56,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:56,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:56,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:56,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:56,530 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-14 12:39:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:56,913 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-14 12:39:56,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:39:56,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:56,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:56,915 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:39:56,916 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:39:56,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:39:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:39:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-14 12:39:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-14 12:39:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-14 12:39:56,919 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-14 12:39:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:56,919 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-14 12:39:56,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-14 12:39:56,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:56,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:56,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:57,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-14 12:39:57,121 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:57,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:57,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-09-14 12:39:57,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:57,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800239183] [2020-09-14 12:39:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:57,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800239183] [2020-09-14 12:39:57,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395309920] [2020-09-14 12:39:57,234 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 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 [2020-09-14 12:39:57,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:39:57,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:57,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:57,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:57,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:57,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249845913] [2020-09-14 12:39:57,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:57,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:57,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:57,456 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-14 12:39:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:57,995 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-14 12:39:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:39:57,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:57,997 INFO L225 Difference]: With dead ends: 215 [2020-09-14 12:39:57,997 INFO L226 Difference]: Without dead ends: 213 [2020-09-14 12:39:57,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:39:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-14 12:39:58,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-14 12:39:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:39:58,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-14 12:39:58,001 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-14 12:39:58,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:58,001 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-14 12:39:58,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:58,002 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-14 12:39:58,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:58,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:58,002 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:58,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:58,212 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-09-14 12:39:58,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:58,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21132732] [2020-09-14 12:39:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:58,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21132732] [2020-09-14 12:39:58,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158852861] [2020-09-14 12:39:58,324 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 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 [2020-09-14 12:39:58,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:39:58,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:39:58,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:58,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:58,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:58,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798685440] [2020-09-14 12:39:58,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:58,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:58,534 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-14 12:39:58,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:58,997 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-14 12:39:58,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:39:58,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:58,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:58,999 INFO L225 Difference]: With dead ends: 196 [2020-09-14 12:39:59,000 INFO L226 Difference]: Without dead ends: 194 [2020-09-14 12:39:59,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:39:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-14 12:39:59,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-14 12:39:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:39:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:39:59,004 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:39:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:59,004 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:39:59,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:39:59,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:59,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:59,005 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:39:59,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:39:59,207 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:39:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:39:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-09-14 12:39:59,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:39:59,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094094610] [2020-09-14 12:39:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:39:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:59,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:59,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094094610] [2020-09-14 12:39:59,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414146730] [2020-09-14 12:39:59,320 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 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 [2020-09-14 12:39:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:39:59,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:39:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:39:59,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:39:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:39:59,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:39:59,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:39:59,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195132717] [2020-09-14 12:39:59,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:39:59,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:39:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:39:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:39:59,502 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:39:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:39:59,872 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-14 12:39:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:39:59,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:39:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:39:59,874 INFO L225 Difference]: With dead ends: 191 [2020-09-14 12:39:59,875 INFO L226 Difference]: Without dead ends: 186 [2020-09-14 12:39:59,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:39:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-14 12:39:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-14 12:39:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:39:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:39:59,878 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:39:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:39:59,878 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:39:59,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:39:59,878 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:39:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:39:59,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:39:59,879 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:00,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-14 12:40:00,080 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-09-14 12:40:00,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:00,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146292821] [2020-09-14 12:40:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:00,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:00,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146292821] [2020-09-14 12:40:00,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175166378] [2020-09-14 12:40:00,197 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 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 [2020-09-14 12:40:00,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:00,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:00,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:00,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:00,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:00,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:00,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779443973] [2020-09-14 12:40:00,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:00,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:00,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:00,435 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:40:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:01,147 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-14 12:40:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:40:01,148 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:01,149 INFO L225 Difference]: With dead ends: 232 [2020-09-14 12:40:01,150 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:40:01,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:40:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:40:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-14 12:40:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-14 12:40:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-14 12:40:01,155 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-14 12:40:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:01,156 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-14 12:40:01,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-14 12:40:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:01,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:01,157 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:01,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:01,370 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:01,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-09-14 12:40:01,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:01,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213269378] [2020-09-14 12:40:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:01,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213269378] [2020-09-14 12:40:01,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898949213] [2020-09-14 12:40:01,477 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 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 [2020-09-14 12:40:01,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:01,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:01,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:01,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:01,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:01,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:01,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728861854] [2020-09-14 12:40:01,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:01,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:01,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:01,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:01,684 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-14 12:40:02,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:02,335 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-14 12:40:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:40:02,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:02,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:02,337 INFO L225 Difference]: With dead ends: 222 [2020-09-14 12:40:02,337 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:40:02,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:40:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:40:02,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-14 12:40:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-14 12:40:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-14 12:40:02,341 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-14 12:40:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:02,341 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-14 12:40:02,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-14 12:40:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:02,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:02,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:02,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:02,542 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-09-14 12:40:02,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:02,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096815470] [2020-09-14 12:40:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:02,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096815470] [2020-09-14 12:40:02,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578860042] [2020-09-14 12:40:02,662 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 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 [2020-09-14 12:40:02,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:02,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:02,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:02,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:02,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:02,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:02,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651557044] [2020-09-14 12:40:02,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:02,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:02,906 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-14 12:40:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:03,847 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-14 12:40:03,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:03,848 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:03,849 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:40:03,849 INFO L226 Difference]: Without dead ends: 246 [2020-09-14 12:40:03,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-14 12:40:03,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-14 12:40:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:40:03,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-14 12:40:03,853 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-14 12:40:03,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:03,854 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-14 12:40:03,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:03,854 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-14 12:40:03,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:03,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:03,855 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:04,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:04,064 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-09-14 12:40:04,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:04,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905902870] [2020-09-14 12:40:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:04,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905902870] [2020-09-14 12:40:04,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044606792] [2020-09-14 12:40:04,182 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 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 [2020-09-14 12:40:04,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:04,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:04,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:04,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:04,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:04,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241916418] [2020-09-14 12:40:04,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:04,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:04,406 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-14 12:40:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:05,347 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-14 12:40:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:05,348 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:05,349 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:40:05,349 INFO L226 Difference]: Without dead ends: 238 [2020-09-14 12:40:05,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:40:05,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-14 12:40:05,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-14 12:40:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:40:05,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-14 12:40:05,353 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-14 12:40:05,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:05,354 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-14 12:40:05,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-14 12:40:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:05,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:05,355 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:05,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-14 12:40:05,565 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:05,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-09-14 12:40:05,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:05,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806571941] [2020-09-14 12:40:05,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:05,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806571941] [2020-09-14 12:40:05,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299547880] [2020-09-14 12:40:05,677 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 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 [2020-09-14 12:40:05,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:05,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:05,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:05,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:05,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:05,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206257143] [2020-09-14 12:40:05,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:05,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:05,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:05,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:05,898 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-14 12:40:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:06,424 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-14 12:40:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:40:06,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:06,426 INFO L225 Difference]: With dead ends: 208 [2020-09-14 12:40:06,426 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:40:06,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:40:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:40:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-14 12:40:06,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-14 12:40:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-14 12:40:06,430 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-14 12:40:06,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:06,430 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-14 12:40:06,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:06,430 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-14 12:40:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:06,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:06,431 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:06,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-14 12:40:06,639 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:06,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:06,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-09-14 12:40:06,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:06,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631455148] [2020-09-14 12:40:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:06,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631455148] [2020-09-14 12:40:06,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160920527] [2020-09-14 12:40:06,755 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 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 [2020-09-14 12:40:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:06,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:06,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:06,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:06,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:06,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180724479] [2020-09-14 12:40:06,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:06,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:06,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:06,951 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-14 12:40:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:07,572 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-14 12:40:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:40:07,573 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:07,574 INFO L225 Difference]: With dead ends: 215 [2020-09-14 12:40:07,574 INFO L226 Difference]: Without dead ends: 213 [2020-09-14 12:40:07,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:40:07,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-14 12:40:07,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-14 12:40:07,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:40:07,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-14 12:40:07,579 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-14 12:40:07,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:07,579 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-14 12:40:07,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-14 12:40:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:07,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:07,579 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:07,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-14 12:40:07,780 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:07,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-09-14 12:40:07,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:07,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216081227] [2020-09-14 12:40:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:07,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216081227] [2020-09-14 12:40:07,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718150976] [2020-09-14 12:40:07,893 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 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 [2020-09-14 12:40:07,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:08,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:08,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:08,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:08,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024833517] [2020-09-14 12:40:08,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:08,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:08,080 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-14 12:40:08,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:08,788 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-14 12:40:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:08,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:08,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:08,790 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:40:08,790 INFO L226 Difference]: Without dead ends: 228 [2020-09-14 12:40:08,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:08,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-14 12:40:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-14 12:40:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-14 12:40:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-14 12:40:08,794 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-14 12:40:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:08,794 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-14 12:40:08,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-14 12:40:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:08,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:08,795 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:08,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-14 12:40:08,995 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-09-14 12:40:08,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:08,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988909476] [2020-09-14 12:40:08,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:09,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988909476] [2020-09-14 12:40:09,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993233400] [2020-09-14 12:40:09,103 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 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 [2020-09-14 12:40:09,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:09,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:09,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:09,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:09,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:09,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580944539] [2020-09-14 12:40:09,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:09,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:09,337 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-14 12:40:10,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:10,067 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-14 12:40:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:40:10,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:10,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:10,069 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:40:10,069 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:40:10,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:40:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:40:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-14 12:40:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-14 12:40:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-14 12:40:10,073 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-14 12:40:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:10,073 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-14 12:40:10,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-14 12:40:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:10,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:10,074 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:10,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-14 12:40:10,275 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:10,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:10,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-09-14 12:40:10,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:10,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545616179] [2020-09-14 12:40:10,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:10,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545616179] [2020-09-14 12:40:10,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192823655] [2020-09-14 12:40:10,390 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 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 [2020-09-14 12:40:10,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:10,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:40:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:10,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:10,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:10,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-14 12:40:10,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42225590] [2020-09-14 12:40:10,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:40:10,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:10,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:40:10,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:40:10,592 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-14 12:40:11,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:11,315 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-14 12:40:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:40:11,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-14 12:40:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:11,318 INFO L225 Difference]: With dead ends: 232 [2020-09-14 12:40:11,318 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:40:11,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:40:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:40:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-14 12:40:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-14 12:40:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-14 12:40:11,322 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-14 12:40:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:11,322 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-14 12:40:11,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:40:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-14 12:40:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:11,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:11,323 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:11,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:11,524 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:11,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-09-14 12:40:11,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:11,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564109521] [2020-09-14 12:40:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564109521] [2020-09-14 12:40:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636579273] [2020-09-14 12:40:11,673 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 [2020-09-14 12:40:11,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:40:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:11,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:11,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:11,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:40:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:11,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:11,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:40:11,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526515576] [2020-09-14 12:40:11,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:40:11,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:11,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:40:11,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:40:11,952 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-09-14 12:40:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:12,229 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-09-14 12:40:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:12,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-09-14 12:40:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:12,231 INFO L225 Difference]: With dead ends: 185 [2020-09-14 12:40:12,231 INFO L226 Difference]: Without dead ends: 180 [2020-09-14 12:40:12,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-14 12:40:12,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-09-14 12:40:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-14 12:40:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-14 12:40:12,235 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-14 12:40:12,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:12,235 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-14 12:40:12,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:40:12,235 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-14 12:40:12,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:12,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:12,236 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:12,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-14 12:40:12,444 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-09-14 12:40:12,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:12,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205468572] [2020-09-14 12:40:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:12,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:12,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205468572] [2020-09-14 12:40:12,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65158986] [2020-09-14 12:40:12,661 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 [2020-09-14 12:40:12,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:12,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:12,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:12,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:12,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206664836] [2020-09-14 12:40:12,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:12,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:12,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:12,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:12,922 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-09-14 12:40:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:12,997 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-09-14 12:40:12,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:40:12,998 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:12,998 INFO L225 Difference]: With dead ends: 180 [2020-09-14 12:40:12,999 INFO L226 Difference]: Without dead ends: 177 [2020-09-14 12:40:12,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-14 12:40:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-09-14 12:40:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:40:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-14 12:40:13,002 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-14 12:40:13,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:13,002 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-14 12:40:13,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:13,002 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-14 12:40:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:13,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:13,003 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:13,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-14 12:40:13,203 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-09-14 12:40:13,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:13,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569241249] [2020-09-14 12:40:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:13,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569241249] [2020-09-14 12:40:13,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075251422] [2020-09-14 12:40:13,404 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 [2020-09-14 12:40:13,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:13,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:13,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:13,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:13,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:13,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938399946] [2020-09-14 12:40:13,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:13,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:13,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:13,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:13,660 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-14 12:40:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:13,772 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-09-14 12:40:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:13,773 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:13,774 INFO L225 Difference]: With dead ends: 197 [2020-09-14 12:40:13,774 INFO L226 Difference]: Without dead ends: 194 [2020-09-14 12:40:13,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:40:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-14 12:40:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-09-14 12:40:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-14 12:40:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-09-14 12:40:13,778 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-09-14 12:40:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:13,779 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-09-14 12:40:13,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-09-14 12:40:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:13,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:13,780 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:13,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:13,988 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-09-14 12:40:13,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:13,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120333224] [2020-09-14 12:40:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120333224] [2020-09-14 12:40:14,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151593416] [2020-09-14 12:40:14,175 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 [2020-09-14 12:40:14,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:40:14,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:14,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:14,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:14,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705899283] [2020-09-14 12:40:14,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:14,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:14,417 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-09-14 12:40:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:14,544 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-09-14 12:40:14,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:40:14,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:14,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:14,546 INFO L225 Difference]: With dead ends: 196 [2020-09-14 12:40:14,546 INFO L226 Difference]: Without dead ends: 193 [2020-09-14 12:40:14,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:40:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-14 12:40:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-09-14 12:40:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-09-14 12:40:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-09-14 12:40:14,551 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-09-14 12:40:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:14,552 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-09-14 12:40:14,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-09-14 12:40:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:14,553 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:14,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:14,755 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-09-14 12:40:14,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:14,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762786873] [2020-09-14 12:40:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:14,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762786873] [2020-09-14 12:40:14,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320053338] [2020-09-14 12:40:14,930 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 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 [2020-09-14 12:40:14,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:40:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:15,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:15,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:15,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:15,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219772192] [2020-09-14 12:40:15,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:15,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:15,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:15,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:15,239 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-09-14 12:40:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:15,437 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-14 12:40:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:15,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:15,438 INFO L225 Difference]: With dead ends: 195 [2020-09-14 12:40:15,438 INFO L226 Difference]: Without dead ends: 192 [2020-09-14 12:40:15,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:40:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-14 12:40:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-09-14 12:40:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-14 12:40:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-09-14 12:40:15,442 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-09-14 12:40:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:15,442 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-09-14 12:40:15,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-09-14 12:40:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:15,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:15,443 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:15,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:15,652 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-09-14 12:40:15,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:15,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831593631] [2020-09-14 12:40:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:15,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831593631] [2020-09-14 12:40:15,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535154271] [2020-09-14 12:40:15,843 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 [2020-09-14 12:40:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:15,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:15,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:16,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:16,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:16,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752450672] [2020-09-14 12:40:16,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:16,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:16,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:16,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:16,144 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-09-14 12:40:16,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:16,398 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-09-14 12:40:16,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:16,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:16,400 INFO L225 Difference]: With dead ends: 194 [2020-09-14 12:40:16,401 INFO L226 Difference]: Without dead ends: 191 [2020-09-14 12:40:16,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:40:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-14 12:40:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-09-14 12:40:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-14 12:40:16,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-09-14 12:40:16,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-09-14 12:40:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:16,405 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-09-14 12:40:16,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:16,406 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-09-14 12:40:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:16,406 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:16,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:16,607 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-09-14 12:40:16,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:16,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378269605] [2020-09-14 12:40:16,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:16,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378269605] [2020-09-14 12:40:16,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439982224] [2020-09-14 12:40:16,741 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 [2020-09-14 12:40:16,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:16,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:16,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:16,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:16,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224352974] [2020-09-14 12:40:16,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:16,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:16,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:16,987 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-09-14 12:40:17,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:17,236 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-09-14 12:40:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:40:17,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:17,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:17,238 INFO L225 Difference]: With dead ends: 193 [2020-09-14 12:40:17,238 INFO L226 Difference]: Without dead ends: 190 [2020-09-14 12:40:17,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:17,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-14 12:40:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-09-14 12:40:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-14 12:40:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-09-14 12:40:17,241 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-09-14 12:40:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:17,241 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-09-14 12:40:17,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-09-14 12:40:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:40:17,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:17,242 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:17,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-14 12:40:17,442 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:17,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-09-14 12:40:17,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:17,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132056125] [2020-09-14 12:40:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:17,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132056125] [2020-09-14 12:40:17,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189402705] [2020-09-14 12:40:17,564 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 [2020-09-14 12:40:17,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:17,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:17,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:17,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:17,814 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:40:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:17,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:17,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:17,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434086571] [2020-09-14 12:40:17,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:17,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:17,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:17,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:17,832 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-09-14 12:40:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:18,148 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-14 12:40:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:18,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-14 12:40:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:18,150 INFO L225 Difference]: With dead ends: 202 [2020-09-14 12:40:18,150 INFO L226 Difference]: Without dead ends: 196 [2020-09-14 12:40:18,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-14 12:40:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-09-14 12:40:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-14 12:40:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-09-14 12:40:18,155 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-09-14 12:40:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:18,156 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-09-14 12:40:18,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-09-14 12:40:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:18,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:18,156 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:18,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-14 12:40:18,367 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:18,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:18,368 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-09-14 12:40:18,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:18,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060724754] [2020-09-14 12:40:18,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:18,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060724754] [2020-09-14 12:40:18,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366385882] [2020-09-14 12:40:18,526 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 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 [2020-09-14 12:40:18,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:18,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:18,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:18,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:18,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552579732] [2020-09-14 12:40:18,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:18,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:18,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:18,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:18,792 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-09-14 12:40:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:18,869 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-09-14 12:40:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:40:18,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:18,871 INFO L225 Difference]: With dead ends: 188 [2020-09-14 12:40:18,872 INFO L226 Difference]: Without dead ends: 186 [2020-09-14 12:40:18,872 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 [2020-09-14 12:40:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-14 12:40:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-09-14 12:40:18,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:40:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-09-14 12:40:18,875 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-09-14 12:40:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:18,876 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-09-14 12:40:18,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-09-14 12:40:18,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:18,876 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:18,876 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:19,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-14 12:40:19,077 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:19,078 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-09-14 12:40:19,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:19,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667920075] [2020-09-14 12:40:19,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:19,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667920075] [2020-09-14 12:40:19,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186089930] [2020-09-14 12:40:19,238 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 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 [2020-09-14 12:40:19,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:19,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:19,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:19,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:19,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:19,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:19,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419353103] [2020-09-14 12:40:19,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:19,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:19,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:19,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:19,513 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-09-14 12:40:19,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:19,787 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-09-14 12:40:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:19,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:19,789 INFO L225 Difference]: With dead ends: 199 [2020-09-14 12:40:19,790 INFO L226 Difference]: Without dead ends: 197 [2020-09-14 12:40:19,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-14 12:40:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-09-14 12:40:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:40:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-14 12:40:19,793 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-14 12:40:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:19,793 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-14 12:40:19,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:19,793 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-14 12:40:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:19,794 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:19,794 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:19,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-14 12:40:19,995 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:19,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:19,995 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-09-14 12:40:19,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:19,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61267771] [2020-09-14 12:40:19,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:20,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61267771] [2020-09-14 12:40:20,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153326232] [2020-09-14 12:40:20,150 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 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 [2020-09-14 12:40:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:20,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:20,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:20,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:20,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569579319] [2020-09-14 12:40:20,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:20,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:20,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:20,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:20,477 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:20,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:20,821 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-14 12:40:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:40:20,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:20,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:20,823 INFO L225 Difference]: With dead ends: 210 [2020-09-14 12:40:20,823 INFO L226 Difference]: Without dead ends: 208 [2020-09-14 12:40:20,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:40:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-14 12:40:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-09-14 12:40:20,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-14 12:40:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-09-14 12:40:20,827 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-09-14 12:40:20,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:20,827 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-09-14 12:40:20,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:20,827 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-09-14 12:40:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:20,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:20,828 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:21,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-14 12:40:21,028 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-09-14 12:40:21,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:21,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107569390] [2020-09-14 12:40:21,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:21,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:21,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107569390] [2020-09-14 12:40:21,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114777645] [2020-09-14 12:40:21,181 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 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 [2020-09-14 12:40:21,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:21,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:21,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:21,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:21,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:21,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840005736] [2020-09-14 12:40:21,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:21,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:21,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:21,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:21,495 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-09-14 12:40:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:21,888 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-09-14 12:40:21,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:21,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:21,890 INFO L225 Difference]: With dead ends: 210 [2020-09-14 12:40:21,890 INFO L226 Difference]: Without dead ends: 208 [2020-09-14 12:40:21,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-14 12:40:21,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-09-14 12:40:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:40:21,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-09-14 12:40:21,894 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-09-14 12:40:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:21,895 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-09-14 12:40:21,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:21,895 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-09-14 12:40:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:21,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:21,895 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:22,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-14 12:40:22,097 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-09-14 12:40:22,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:22,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866863495] [2020-09-14 12:40:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:22,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866863495] [2020-09-14 12:40:22,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41572154] [2020-09-14 12:40:22,249 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 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 [2020-09-14 12:40:22,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:40:22,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:22,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:25,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:25,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:25,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357283554] [2020-09-14 12:40:25,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:25,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:40:25,911 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:30,161 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:40:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:30,463 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-14 12:40:30,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:30,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:30,465 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:40:30,466 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:40:30,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-14 12:40:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:40:30,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-14 12:40:30,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:30,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:30,470 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:30,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:30,470 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:30,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:30,470 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:30,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:30,471 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:30,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:30,671 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:30,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-09-14 12:40:30,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:30,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001265797] [2020-09-14 12:40:30,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001265797] [2020-09-14 12:40:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203908296] [2020-09-14 12:40:30,825 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 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 [2020-09-14 12:40:30,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:30,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:31,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:31,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:31,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026466413] [2020-09-14 12:40:31,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:31,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:31,166 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:31,590 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-09-14 12:40:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:31,591 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:31,592 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:31,592 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:31,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:31,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-09-14 12:40:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-14 12:40:31,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-09-14 12:40:31,596 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-09-14 12:40:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:31,596 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-09-14 12:40:31,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-09-14 12:40:31,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:31,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:31,597 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:31,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:31,797 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-09-14 12:40:31,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:31,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207675840] [2020-09-14 12:40:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:31,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:31,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207675840] [2020-09-14 12:40:31,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232191718] [2020-09-14 12:40:31,951 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 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 [2020-09-14 12:40:32,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:32,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:32,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:32,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:32,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:32,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:32,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972435995] [2020-09-14 12:40:32,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:32,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:32,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:32,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:32,222 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-09-14 12:40:32,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:32,610 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-14 12:40:32,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:40:32,611 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:32,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:32,612 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:32,612 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:32,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:32,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-09-14 12:40:32,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:32,616 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:32,616 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:32,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:32,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:32,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:32,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:32,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:32,818 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:32,818 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-09-14 12:40:32,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:32,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130429194] [2020-09-14 12:40:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130429194] [2020-09-14 12:40:32,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433988911] [2020-09-14 12:40:32,968 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 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 [2020-09-14 12:40:33,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:40:33,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:33,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:33,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:33,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:33,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571721305] [2020-09-14 12:40:33,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:33,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:33,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:33,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:33,221 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:33,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:33,670 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-09-14 12:40:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:33,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:33,672 INFO L225 Difference]: With dead ends: 224 [2020-09-14 12:40:33,673 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:40:33,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:33,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:40:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-09-14 12:40:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:33,677 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:33,677 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:33,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:33,678 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:33,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:33,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:33,884 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-09-14 12:40:33,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:33,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780026138] [2020-09-14 12:40:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:34,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780026138] [2020-09-14 12:40:34,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995085933] [2020-09-14 12:40:34,039 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 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 [2020-09-14 12:40:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:34,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:34,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:34,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:34,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831046347] [2020-09-14 12:40:34,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:34,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:34,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:34,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:34,296 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:34,688 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-09-14 12:40:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:34,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:34,690 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:40:34,690 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:40:34,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:34,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:40:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-09-14 12:40:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:40:34,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-09-14 12:40:34,694 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-09-14 12:40:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:34,694 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-09-14 12:40:34,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-09-14 12:40:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:34,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:34,695 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:34,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:34,895 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:34,896 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-09-14 12:40:34,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:34,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274931071] [2020-09-14 12:40:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:35,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:35,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274931071] [2020-09-14 12:40:35,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747258067] [2020-09-14 12:40:35,047 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 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 [2020-09-14 12:40:35,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:35,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:35,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:35,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:35,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:35,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261430767] [2020-09-14 12:40:35,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:35,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:35,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:35,303 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:35,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:35,641 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-09-14 12:40:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:35,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:35,643 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:40:35,643 INFO L226 Difference]: Without dead ends: 204 [2020-09-14 12:40:35,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-14 12:40:35,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-09-14 12:40:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-14 12:40:35,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-09-14 12:40:35,646 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-09-14 12:40:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:35,646 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-09-14 12:40:35,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-09-14 12:40:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:35,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:35,646 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:35,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-14 12:40:35,847 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:35,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:35,848 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-09-14 12:40:35,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:35,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131385871] [2020-09-14 12:40:35,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:36,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131385871] [2020-09-14 12:40:36,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198693332] [2020-09-14 12:40:36,010 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 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 [2020-09-14 12:40:36,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:40:36,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:36,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:36,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:36,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:36,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313306352] [2020-09-14 12:40:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:36,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:36,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:36,254 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-09-14 12:40:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:36,596 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-09-14 12:40:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:36,597 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:36,598 INFO L225 Difference]: With dead ends: 207 [2020-09-14 12:40:36,599 INFO L226 Difference]: Without dead ends: 205 [2020-09-14 12:40:36,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-14 12:40:36,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-09-14 12:40:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:40:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-09-14 12:40:36,602 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-09-14 12:40:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:36,603 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-09-14 12:40:36,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-09-14 12:40:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:36,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:36,604 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:36,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-14 12:40:36,814 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:36,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-09-14 12:40:36,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:36,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714573873] [2020-09-14 12:40:36,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:36,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714573873] [2020-09-14 12:40:36,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882812727] [2020-09-14 12:40:36,980 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 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 [2020-09-14 12:40:37,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:37,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:37,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:37,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:37,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:37,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:37,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121291705] [2020-09-14 12:40:37,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:37,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:37,238 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-09-14 12:40:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:37,598 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-09-14 12:40:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:40:37,599 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:37,600 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:40:37,601 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:40:37,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:40:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-09-14 12:40:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:40:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-09-14 12:40:37,604 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-09-14 12:40:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:37,604 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-09-14 12:40:37,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-09-14 12:40:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:37,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:37,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:37,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-14 12:40:37,807 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-09-14 12:40:37,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:37,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597573744] [2020-09-14 12:40:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:37,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597573744] [2020-09-14 12:40:37,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260553624] [2020-09-14 12:40:37,959 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 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 [2020-09-14 12:40:38,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:38,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:38,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:38,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:38,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:38,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623900728] [2020-09-14 12:40:38,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:38,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:38,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:38,336 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-09-14 12:40:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:38,818 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-09-14 12:40:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:38,818 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:38,819 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:40:38,819 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:40:38,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:38,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:40:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-09-14 12:40:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:40:38,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-09-14 12:40:38,823 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-09-14 12:40:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:38,823 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-09-14 12:40:38,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:38,824 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-09-14 12:40:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:38,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:38,824 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:39,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-14 12:40:39,027 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:39,028 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-09-14 12:40:39,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:39,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647803440] [2020-09-14 12:40:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:39,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647803440] [2020-09-14 12:40:39,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492356498] [2020-09-14 12:40:39,195 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 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 [2020-09-14 12:40:39,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:39,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:39,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:39,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:39,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563918049] [2020-09-14 12:40:39,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:39,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:39,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:39,448 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-09-14 12:40:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:39,833 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-09-14 12:40:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:39,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:39,835 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:40:39,835 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:40:39,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:40:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-09-14 12:40:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:40:39,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-09-14 12:40:39,840 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-09-14 12:40:39,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:39,840 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-09-14 12:40:39,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:39,840 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-09-14 12:40:39,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:39,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:39,840 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:40,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:40,041 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:40,042 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-09-14 12:40:40,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:40,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631100162] [2020-09-14 12:40:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:40,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631100162] [2020-09-14 12:40:40,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776286218] [2020-09-14 12:40:40,198 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 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 [2020-09-14 12:40:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:40,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:40,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:40,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:40,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:40,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845878797] [2020-09-14 12:40:40,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:40,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:40,457 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-09-14 12:40:40,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:40,835 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-09-14 12:40:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:40:40,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:40,837 INFO L225 Difference]: With dead ends: 214 [2020-09-14 12:40:40,837 INFO L226 Difference]: Without dead ends: 212 [2020-09-14 12:40:40,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-14 12:40:40,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-09-14 12:40:40,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:40:40,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-09-14 12:40:40,841 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-09-14 12:40:40,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:40,841 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-09-14 12:40:40,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:40,842 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-09-14 12:40:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:40,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:40,842 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:41,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:41,043 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:41,043 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-09-14 12:40:41,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:41,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538959046] [2020-09-14 12:40:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:41,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538959046] [2020-09-14 12:40:41,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205392048] [2020-09-14 12:40:41,252 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 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 [2020-09-14 12:40:41,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:41,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:41,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:41,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:41,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569420617] [2020-09-14 12:40:41,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:41,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:41,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:41,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:41,522 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-09-14 12:40:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:41,797 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-09-14 12:40:41,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:41,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:41,799 INFO L225 Difference]: With dead ends: 203 [2020-09-14 12:40:41,799 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:40:41,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:40:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:40:41,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-09-14 12:40:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:40:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-09-14 12:40:41,802 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-09-14 12:40:41,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:41,802 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-09-14 12:40:41,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-09-14 12:40:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:41,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:41,802 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:42,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-14 12:40:42,003 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:42,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:42,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-09-14 12:40:42,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:42,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146956662] [2020-09-14 12:40:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:42,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:42,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146956662] [2020-09-14 12:40:42,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628630476] [2020-09-14 12:40:42,242 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 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 [2020-09-14 12:40:42,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:42,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:42,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:42,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:42,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:42,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:42,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023115804] [2020-09-14 12:40:42,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:42,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:42,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:42,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:42,499 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-09-14 12:40:42,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:42,597 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-09-14 12:40:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:40:42,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:42,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:42,599 INFO L225 Difference]: With dead ends: 212 [2020-09-14 12:40:42,599 INFO L226 Difference]: Without dead ends: 210 [2020-09-14 12:40:42,599 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 [2020-09-14 12:40:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-14 12:40:42,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-09-14 12:40:42,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:40:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-09-14 12:40:42,602 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-09-14 12:40:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:42,603 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-09-14 12:40:42,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-09-14 12:40:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:42,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:42,603 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:42,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:42,804 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-09-14 12:40:42,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:42,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816662015] [2020-09-14 12:40:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:43,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:43,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816662015] [2020-09-14 12:40:43,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51721428] [2020-09-14 12:40:43,017 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 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 [2020-09-14 12:40:43,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:43,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:43,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:43,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522908437] [2020-09-14 12:40:43,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:43,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:43,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:43,283 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-09-14 12:40:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:43,594 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-09-14 12:40:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:43,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:43,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:43,596 INFO L225 Difference]: With dead ends: 217 [2020-09-14 12:40:43,597 INFO L226 Difference]: Without dead ends: 215 [2020-09-14 12:40:43,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:40:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-14 12:40:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-09-14 12:40:43,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:40:43,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-14 12:40:43,601 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-14 12:40:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:43,601 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-14 12:40:43,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-14 12:40:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:43,602 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:43,602 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:43,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:43,812 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-09-14 12:40:43,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:43,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150562181] [2020-09-14 12:40:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:43,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150562181] [2020-09-14 12:40:43,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111652766] [2020-09-14 12:40:43,982 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 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 [2020-09-14 12:40:44,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:44,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:44,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:44,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:44,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46721043] [2020-09-14 12:40:44,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:44,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:44,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:44,290 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-14 12:40:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:44,680 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-14 12:40:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:40:44,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:44,682 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:40:44,682 INFO L226 Difference]: Without dead ends: 225 [2020-09-14 12:40:44,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:40:44,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-14 12:40:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-09-14 12:40:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:40:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-09-14 12:40:44,686 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-09-14 12:40:44,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:44,687 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-09-14 12:40:44,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-09-14 12:40:44,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:44,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:44,687 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:44,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:40:44,890 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-09-14 12:40:44,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:44,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513551180] [2020-09-14 12:40:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:45,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513551180] [2020-09-14 12:40:45,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472955897] [2020-09-14 12:40:45,063 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 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 [2020-09-14 12:40:45,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:45,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:45,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:45,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:45,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398568023] [2020-09-14 12:40:45,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:45,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:45,356 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-09-14 12:40:45,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:45,842 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-09-14 12:40:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:40:45,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:45,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:45,844 INFO L225 Difference]: With dead ends: 227 [2020-09-14 12:40:45,844 INFO L226 Difference]: Without dead ends: 225 [2020-09-14 12:40:45,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-14 12:40:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-09-14 12:40:45,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:40:45,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-09-14 12:40:45,848 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-09-14 12:40:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:45,848 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-09-14 12:40:45,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:45,849 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-09-14 12:40:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:45,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:45,849 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:46,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-14 12:40:46,052 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:46,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:46,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-09-14 12:40:46,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:46,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460900978] [2020-09-14 12:40:46,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:46,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460900978] [2020-09-14 12:40:46,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055092930] [2020-09-14 12:40:46,224 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 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 [2020-09-14 12:40:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:49,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:49,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:49,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060174439] [2020-09-14 12:40:49,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:49,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:49,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:49,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:40:49,561 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-09-14 12:40:53,839 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:40:54,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:54,226 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-09-14 12:40:54,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:40:54,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:54,228 INFO L225 Difference]: With dead ends: 237 [2020-09-14 12:40:54,228 INFO L226 Difference]: Without dead ends: 235 [2020-09-14 12:40:54,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-14 12:40:54,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-14 12:40:54,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-09-14 12:40:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:40:54,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:40:54,231 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:40:54,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:54,231 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:40:54,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:54,231 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:40:54,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:54,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:54,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:54,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-14 12:40:54,436 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:54,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-09-14 12:40:54,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:54,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658987830] [2020-09-14 12:40:54,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:54,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658987830] [2020-09-14 12:40:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176856760] [2020-09-14 12:40:54,609 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 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 [2020-09-14 12:40:54,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:40:54,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:54,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:54,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:54,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:54,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328615871] [2020-09-14 12:40:54,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:54,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:54,926 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:40:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:55,463 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-09-14 12:40:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:40:55,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:55,465 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:40:55,465 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:40:55,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:40:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:40:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-14 12:40:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:40:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-09-14 12:40:55,469 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-09-14 12:40:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:55,469 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-09-14 12:40:55,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-09-14 12:40:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:55,470 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:55,470 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:55,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-14 12:40:55,671 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:55,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:55,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-09-14 12:40:55,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:55,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439846126] [2020-09-14 12:40:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:55,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439846126] [2020-09-14 12:40:55,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507108297] [2020-09-14 12:40:55,813 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 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 [2020-09-14 12:40:55,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:40:55,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:55,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:55,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:56,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:56,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:56,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734303459] [2020-09-14 12:40:56,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:56,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:56,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:56,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:56,075 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-09-14 12:40:56,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:56,693 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-09-14 12:40:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:40:56,695 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:56,695 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:40:56,696 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:40:56,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:40:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:40:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-09-14 12:40:56,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:40:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:40:56,699 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:40:56,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:56,700 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:40:56,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:56,700 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:40:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:56,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:56,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:56,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-14 12:40:56,910 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:56,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-09-14 12:40:56,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:56,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897279374] [2020-09-14 12:40:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:57,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897279374] [2020-09-14 12:40:57,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329389127] [2020-09-14 12:40:57,067 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 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 [2020-09-14 12:40:57,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:40:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:57,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:57,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:57,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:57,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571801081] [2020-09-14 12:40:57,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:57,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:57,313 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:40:57,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:57,889 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-09-14 12:40:57,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:40:57,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:57,891 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:40:57,891 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:40:57,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:40:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:40:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-14 12:40:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:40:57,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:40:57,895 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:40:57,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:57,895 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:40:57,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:40:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:57,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:57,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:58,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-14 12:40:58,097 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:58,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-09-14 12:40:58,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:58,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507555847] [2020-09-14 12:40:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:58,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507555847] [2020-09-14 12:40:58,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37486440] [2020-09-14 12:40:58,236 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 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 [2020-09-14 12:40:58,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:40:58,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:58,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:58,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:58,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:58,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:58,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908093655] [2020-09-14 12:40:58,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:58,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:58,497 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:40:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:58,960 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-09-14 12:40:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:40:58,961 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:58,962 INFO L225 Difference]: With dead ends: 234 [2020-09-14 12:40:58,962 INFO L226 Difference]: Without dead ends: 232 [2020-09-14 12:40:58,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:40:58,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-14 12:40:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-09-14 12:40:58,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:40:58,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-09-14 12:40:58,966 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-09-14 12:40:58,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:58,966 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-09-14 12:40:58,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:58,967 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-09-14 12:40:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:58,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:58,967 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:40:59,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-14 12:40:59,175 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:40:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:40:59,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-09-14 12:40:59,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:40:59,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256659080] [2020-09-14 12:40:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:40:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:40:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:59,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256659080] [2020-09-14 12:40:59,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513426162] [2020-09-14 12:40:59,326 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 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 [2020-09-14 12:40:59,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:40:59,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:40:59,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:40:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:40:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:40:59,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:40:59,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:40:59,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033432046] [2020-09-14 12:40:59,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:40:59,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:40:59,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:40:59,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:40:59,581 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-09-14 12:40:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:40:59,984 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-09-14 12:40:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:40:59,986 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:40:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:40:59,986 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:40:59,986 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:40:59,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:40:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:40:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-09-14 12:40:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:40:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-09-14 12:40:59,990 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-09-14 12:40:59,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:40:59,991 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-09-14 12:40:59,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:40:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-09-14 12:40:59,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:40:59,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:40:59,991 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:00,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:00,192 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-09-14 12:41:00,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:00,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517995278] [2020-09-14 12:41:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:00,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517995278] [2020-09-14 12:41:00,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591018895] [2020-09-14 12:41:00,403 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 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 [2020-09-14 12:41:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:00,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:00,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:00,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:00,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829242125] [2020-09-14 12:41:00,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:00,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:00,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:00,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:00,661 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-09-14 12:41:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:00,805 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-09-14 12:41:00,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:41:00,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:00,807 INFO L225 Difference]: With dead ends: 208 [2020-09-14 12:41:00,807 INFO L226 Difference]: Without dead ends: 206 [2020-09-14 12:41:00,807 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 [2020-09-14 12:41:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-14 12:41:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-09-14 12:41:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:41:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-09-14 12:41:00,811 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-09-14 12:41:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:00,811 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-09-14 12:41:00,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-09-14 12:41:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:00,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:00,812 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:01,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:01,012 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:01,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:01,013 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-09-14 12:41:01,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:01,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325977764] [2020-09-14 12:41:01,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:01,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325977764] [2020-09-14 12:41:01,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138690760] [2020-09-14 12:41:01,206 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 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 [2020-09-14 12:41:01,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:01,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:01,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:01,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:01,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237794676] [2020-09-14 12:41:01,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:01,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:01,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:01,468 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-09-14 12:41:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:01,838 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-09-14 12:41:01,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:01,839 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:01,839 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:41:01,840 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:41:01,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:41:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:41:01,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-09-14 12:41:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:01,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-14 12:41:01,844 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-14 12:41:01,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:01,845 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-14 12:41:01,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:01,845 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-14 12:41:01,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:01,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:01,845 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:02,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:02,048 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-09-14 12:41:02,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:02,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000071875] [2020-09-14 12:41:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:02,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:02,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:02,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000071875] [2020-09-14 12:41:02,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386573164] [2020-09-14 12:41:02,225 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 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 [2020-09-14 12:41:02,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:02,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:02,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:02,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740448814] [2020-09-14 12:41:02,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:02,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:02,523 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:02,975 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-09-14 12:41:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:02,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:02,977 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:02,977 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:02,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:41:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-09-14 12:41:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:41:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-09-14 12:41:02,981 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-09-14 12:41:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:02,981 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-09-14 12:41:02,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-09-14 12:41:02,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:02,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:02,981 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:03,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:03,182 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-09-14 12:41:03,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:03,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908752649] [2020-09-14 12:41:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:03,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:03,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908752649] [2020-09-14 12:41:03,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349276301] [2020-09-14 12:41:03,338 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 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 [2020-09-14 12:41:03,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:03,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:03,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:03,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743127394] [2020-09-14 12:41:03,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:03,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:03,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:03,647 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-09-14 12:41:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:04,188 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-09-14 12:41:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:04,189 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:04,190 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:41:04,190 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:41:04,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:41:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-09-14 12:41:04,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-09-14 12:41:04,194 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-09-14 12:41:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:04,194 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-09-14 12:41:04,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:04,194 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-09-14 12:41:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:04,195 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:04,195 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:04,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:04,404 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:04,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:04,404 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-09-14 12:41:04,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:04,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660468644] [2020-09-14 12:41:04,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:04,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660468644] [2020-09-14 12:41:04,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390253025] [2020-09-14 12:41:04,556 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 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 [2020-09-14 12:41:04,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:08,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:08,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:08,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879628613] [2020-09-14 12:41:08,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:08,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:08,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:08,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:08,272 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:12,586 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:41:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:12,989 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-09-14 12:41:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:12,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:12,991 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:41:12,991 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:41:12,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:41:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:41:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-14 12:41:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-09-14 12:41:12,995 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-09-14 12:41:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:12,995 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-09-14 12:41:12,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-09-14 12:41:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:12,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:12,996 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:13,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:13,197 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:13,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:13,197 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-09-14 12:41:13,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:13,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145069064] [2020-09-14 12:41:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:13,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145069064] [2020-09-14 12:41:13,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685446078] [2020-09-14 12:41:13,360 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 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 [2020-09-14 12:41:13,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:13,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:13,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:13,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:13,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:13,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:13,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906331713] [2020-09-14 12:41:13,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:13,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:13,684 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-09-14 12:41:14,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:14,256 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-09-14 12:41:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:14,257 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:14,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:14,258 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:41:14,258 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:41:14,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:14,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:41:14,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-09-14 12:41:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:41:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-09-14 12:41:14,261 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-09-14 12:41:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:14,262 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-09-14 12:41:14,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-09-14 12:41:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:14,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:14,262 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:14,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-09-14 12:41:14,463 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:14,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-09-14 12:41:14,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:14,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880128642] [2020-09-14 12:41:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:14,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880128642] [2020-09-14 12:41:14,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202238498] [2020-09-14 12:41:14,663 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 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 [2020-09-14 12:41:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:14,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:14,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:14,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357916648] [2020-09-14 12:41:14,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:14,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:14,920 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-09-14 12:41:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:15,113 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-09-14 12:41:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:41:15,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:15,115 INFO L225 Difference]: With dead ends: 204 [2020-09-14 12:41:15,115 INFO L226 Difference]: Without dead ends: 202 [2020-09-14 12:41:15,115 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 [2020-09-14 12:41:15,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-14 12:41:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-09-14 12:41:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-09-14 12:41:15,118 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-09-14 12:41:15,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:15,119 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-09-14 12:41:15,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-09-14 12:41:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:15,119 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:15,119 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:15,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:15,320 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:15,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:15,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-09-14 12:41:15,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:15,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559220415] [2020-09-14 12:41:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:15,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559220415] [2020-09-14 12:41:15,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641556521] [2020-09-14 12:41:15,495 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 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 [2020-09-14 12:41:15,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:15,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:15,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:15,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:15,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:15,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938577636] [2020-09-14 12:41:15,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:15,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:15,750 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-09-14 12:41:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:16,160 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-09-14 12:41:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:16,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:16,162 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:41:16,163 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:41:16,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:41:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:41:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-09-14 12:41:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-09-14 12:41:16,166 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-09-14 12:41:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:16,166 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-09-14 12:41:16,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-09-14 12:41:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:16,167 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:16,167 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:16,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-14 12:41:16,368 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-09-14 12:41:16,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:16,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882072858] [2020-09-14 12:41:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:16,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882072858] [2020-09-14 12:41:16,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686447192] [2020-09-14 12:41:16,520 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 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 [2020-09-14 12:41:16,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:16,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:16,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:16,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:16,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:16,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905025820] [2020-09-14 12:41:16,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:16,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:16,823 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-09-14 12:41:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:17,324 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-09-14 12:41:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:17,325 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:17,326 INFO L225 Difference]: With dead ends: 231 [2020-09-14 12:41:17,326 INFO L226 Difference]: Without dead ends: 229 [2020-09-14 12:41:17,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:41:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-14 12:41:17,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-09-14 12:41:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:41:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-09-14 12:41:17,329 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-09-14 12:41:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:17,329 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-09-14 12:41:17,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-09-14 12:41:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:17,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:17,330 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:17,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:17,531 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:17,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-09-14 12:41:17,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:17,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552509308] [2020-09-14 12:41:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:17,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552509308] [2020-09-14 12:41:17,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156074110] [2020-09-14 12:41:17,707 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 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 [2020-09-14 12:41:17,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:17,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:17,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:17,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:17,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:17,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:17,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993304819] [2020-09-14 12:41:17,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:17,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:17,966 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-09-14 12:41:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:18,204 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-09-14 12:41:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:41:18,205 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:18,205 INFO L225 Difference]: With dead ends: 200 [2020-09-14 12:41:18,206 INFO L226 Difference]: Without dead ends: 198 [2020-09-14 12:41:18,206 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 [2020-09-14 12:41:18,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-09-14 12:41:18,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-09-14 12:41:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-09-14 12:41:18,208 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-09-14 12:41:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:18,208 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-09-14 12:41:18,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-09-14 12:41:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:18,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:18,210 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:18,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:18,413 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-09-14 12:41:18,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:18,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304911894] [2020-09-14 12:41:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:18,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304911894] [2020-09-14 12:41:18,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573080607] [2020-09-14 12:41:18,571 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 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 [2020-09-14 12:41:18,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:41:18,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:18,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:18,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:18,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612359489] [2020-09-14 12:41:18,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:18,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:18,844 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-09-14 12:41:19,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:19,383 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-14 12:41:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:41:19,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:19,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:19,385 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:41:19,385 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:41:19,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:41:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:41:19,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-09-14 12:41:19,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-09-14 12:41:19,388 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-09-14 12:41:19,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:19,389 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-09-14 12:41:19,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:19,389 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-09-14 12:41:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:19,389 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:19,390 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:19,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-09-14 12:41:19,590 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-09-14 12:41:19,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:19,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634937936] [2020-09-14 12:41:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634937936] [2020-09-14 12:41:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119853356] [2020-09-14 12:41:19,748 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 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 [2020-09-14 12:41:19,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:19,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:41:19,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:19,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:19,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:41:19,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530081829] [2020-09-14 12:41:19,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:41:19,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:19,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:41:19,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:41:19,837 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-09-14 12:41:20,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:20,051 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-09-14 12:41:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:41:20,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:41:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:20,053 INFO L225 Difference]: With dead ends: 201 [2020-09-14 12:41:20,053 INFO L226 Difference]: Without dead ends: 199 [2020-09-14 12:41:20,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:41:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-14 12:41:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-09-14 12:41:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:20,057 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:20,057 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:20,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:41:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:20,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:20,058 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:20,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:20,259 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:20,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-09-14 12:41:20,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:20,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058055029] [2020-09-14 12:41:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:20,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058055029] [2020-09-14 12:41:20,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780207220] [2020-09-14 12:41:20,398 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 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 [2020-09-14 12:41:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:20,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:20,647 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:20,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:20,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:20,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452875231] [2020-09-14 12:41:20,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:20,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:20,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:20,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:20,699 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:21,319 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-09-14 12:41:21,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:21,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:21,321 INFO L225 Difference]: With dead ends: 226 [2020-09-14 12:41:21,321 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:41:21,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:21,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:41:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-09-14 12:41:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:21,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-14 12:41:21,324 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-14 12:41:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:21,325 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-14 12:41:21,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:21,325 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-14 12:41:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:21,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:21,325 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:21,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:21,526 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:21,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-09-14 12:41:21,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:21,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171367822] [2020-09-14 12:41:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:21,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171367822] [2020-09-14 12:41:21,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936721816] [2020-09-14 12:41:21,659 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 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 [2020-09-14 12:41:21,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:21,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:21,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:21,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:21,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746874669] [2020-09-14 12:41:21,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:21,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:21,943 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-14 12:41:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:22,438 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-09-14 12:41:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:41:22,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:22,440 INFO L225 Difference]: With dead ends: 218 [2020-09-14 12:41:22,440 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:41:22,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:41:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-09-14 12:41:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:22,444 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:22,444 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:22,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:22,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:22,444 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:22,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:22,645 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-09-14 12:41:22,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:22,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267851100] [2020-09-14 12:41:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:22,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267851100] [2020-09-14 12:41:22,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254236648] [2020-09-14 12:41:22,795 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 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 [2020-09-14 12:41:22,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:22,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:22,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:23,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:23,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:23,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:23,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898222832] [2020-09-14 12:41:23,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:23,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:23,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:23,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:23,102 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:23,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:23,907 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-09-14 12:41:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:41:23,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:23,909 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:41:23,909 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:41:23,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:41:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:41:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-09-14 12:41:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:23,912 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:23,913 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:23,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:23,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:23,913 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:24,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:24,114 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-09-14 12:41:24,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:24,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012845846] [2020-09-14 12:41:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:24,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012845846] [2020-09-14 12:41:24,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197843563] [2020-09-14 12:41:24,262 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 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 [2020-09-14 12:41:24,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:24,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:24,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:24,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:24,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:24,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:24,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:24,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910850505] [2020-09-14 12:41:24,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:24,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:24,514 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:25,135 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-09-14 12:41:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:25,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:25,137 INFO L225 Difference]: With dead ends: 238 [2020-09-14 12:41:25,137 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:25,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:41:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-14 12:41:25,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:25,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-14 12:41:25,141 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-14 12:41:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:25,141 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-14 12:41:25,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:25,141 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-14 12:41:25,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:25,142 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:25,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:25,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:25,350 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-09-14 12:41:25,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:25,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846632202] [2020-09-14 12:41:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:25,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:25,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846632202] [2020-09-14 12:41:25,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072595943] [2020-09-14 12:41:25,494 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 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 [2020-09-14 12:41:25,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:41:25,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:25,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:25,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:25,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:25,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:25,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775482499] [2020-09-14 12:41:25,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:25,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:25,814 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-14 12:41:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:26,453 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-09-14 12:41:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:41:26,454 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:26,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:26,455 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:26,455 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:26,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-09-14 12:41:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:41:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-09-14 12:41:26,459 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-09-14 12:41:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:26,459 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-09-14 12:41:26,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:26,459 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-09-14 12:41:26,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:26,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:26,460 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:26,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:26,669 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:26,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:26,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-09-14 12:41:26,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:26,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722804746] [2020-09-14 12:41:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:26,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722804746] [2020-09-14 12:41:26,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140491178] [2020-09-14 12:41:26,806 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 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 [2020-09-14 12:41:26,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:41:26,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:26,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:27,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:27,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:27,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238747097] [2020-09-14 12:41:27,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:27,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:27,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:27,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:27,136 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-09-14 12:41:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:27,888 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-09-14 12:41:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:41:27,889 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:27,890 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:41:27,890 INFO L226 Difference]: Without dead ends: 250 [2020-09-14 12:41:27,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:41:27,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-14 12:41:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-09-14 12:41:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:41:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-09-14 12:41:27,894 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-09-14 12:41:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:27,894 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-09-14 12:41:27,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-09-14 12:41:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:27,895 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:27,895 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:28,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-14 12:41:28,096 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-09-14 12:41:28,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:28,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002519053] [2020-09-14 12:41:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:28,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002519053] [2020-09-14 12:41:28,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840640355] [2020-09-14 12:41:28,235 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 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 [2020-09-14 12:41:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:28,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:28,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:28,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:28,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:28,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:28,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326672776] [2020-09-14 12:41:28,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:28,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:28,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:28,549 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-09-14 12:41:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:29,504 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-09-14 12:41:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:41:29,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:29,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:29,506 INFO L225 Difference]: With dead ends: 258 [2020-09-14 12:41:29,506 INFO L226 Difference]: Without dead ends: 253 [2020-09-14 12:41:29,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:41:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-14 12:41:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-14 12:41:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:41:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:41:29,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:41:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:29,509 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:41:29,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:41:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:29,510 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:29,510 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:29,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-09-14 12:41:29,713 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-09-14 12:41:29,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:29,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383381128] [2020-09-14 12:41:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383381128] [2020-09-14 12:41:29,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237983717] [2020-09-14 12:41:29,867 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 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 [2020-09-14 12:41:29,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:32,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:32,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:32,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:32,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759808618] [2020-09-14 12:41:32,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:32,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:32,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:32,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:32,212 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:41:36,649 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-09-14 12:41:40,950 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-09-14 12:41:41,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:41,790 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-09-14 12:41:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:41:41,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:41,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:41,792 INFO L225 Difference]: With dead ends: 287 [2020-09-14 12:41:41,792 INFO L226 Difference]: Without dead ends: 279 [2020-09-14 12:41:41,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-09-14 12:41:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-09-14 12:41:41,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-09-14 12:41:41,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:41:41,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-09-14 12:41:41,797 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-09-14 12:41:41,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:41,797 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-09-14 12:41:41,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-09-14 12:41:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:41,798 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:42,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-09-14 12:41:42,008 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:42,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-09-14 12:41:42,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:42,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010869174] [2020-09-14 12:41:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:42,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010869174] [2020-09-14 12:41:42,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469455187] [2020-09-14 12:41:42,158 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 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 [2020-09-14 12:41:42,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:41:42,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:42,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:42,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:42,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:41:42,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:41:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:42,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:42,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:42,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154105405] [2020-09-14 12:41:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:42,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:42,660 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 17 states. [2020-09-14 12:41:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:43,786 INFO L93 Difference]: Finished difference Result 260 states and 621 transitions. [2020-09-14 12:41:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:41:43,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:43,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:43,789 INFO L225 Difference]: With dead ends: 260 [2020-09-14 12:41:43,789 INFO L226 Difference]: Without dead ends: 255 [2020-09-14 12:41:43,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:41:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-14 12:41:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-09-14 12:41:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:41:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-09-14 12:41:43,792 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-09-14 12:41:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:43,793 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-09-14 12:41:43,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-09-14 12:41:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:43,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:43,793 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:43,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:43,994 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-09-14 12:41:43,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:43,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930076305] [2020-09-14 12:41:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:44,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930076305] [2020-09-14 12:41:44,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697440030] [2020-09-14 12:41:44,143 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 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 [2020-09-14 12:41:44,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:41:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:44,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:44,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:44,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275006511] [2020-09-14 12:41:44,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:44,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:44,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:44,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:41:44,464 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-09-14 12:41:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:41:45,035 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-09-14 12:41:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:41:45,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:41:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:41:45,037 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:41:45,038 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:41:45,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:41:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:41:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-09-14 12:41:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:41:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-09-14 12:41:45,041 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-09-14 12:41:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:41:45,041 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-09-14 12:41:45,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:41:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-09-14 12:41:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:41:45,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:41:45,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:41:45,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:41:45,243 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:41:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:41:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-09-14 12:41:45,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:41:45,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23186504] [2020-09-14 12:41:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:41:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:41:45,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:45,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23186504] [2020-09-14 12:41:45,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389153432] [2020-09-14 12:41:45,378 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 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 [2020-09-14 12:41:45,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:41:45,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:41:45,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:41:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:41:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:41:49,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:41:49,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:41:49,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758409924] [2020-09-14 12:41:49,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:41:49,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:41:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:41:49,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:41:49,330 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-09-14 12:41:53,715 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:00,149 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-09-14 12:42:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:42:00,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:00,151 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:42:00,151 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:42:00,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:42:00,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:42:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-09-14 12:42:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:42:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-09-14 12:42:00,156 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-09-14 12:42:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:00,156 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-09-14 12:42:00,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-09-14 12:42:00,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:00,156 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:00,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:00,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-09-14 12:42:00,357 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-09-14 12:42:00,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:00,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759095763] [2020-09-14 12:42:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:00,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:00,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759095763] [2020-09-14 12:42:00,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285020181] [2020-09-14 12:42:00,500 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 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 [2020-09-14 12:42:00,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:42:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:00,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:00,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:00,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:00,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99277871] [2020-09-14 12:42:00,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:00,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:00,874 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-09-14 12:42:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:01,472 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-09-14 12:42:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:42:01,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:01,475 INFO L225 Difference]: With dead ends: 235 [2020-09-14 12:42:01,475 INFO L226 Difference]: Without dead ends: 233 [2020-09-14 12:42:01,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:42:01,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-14 12:42:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-09-14 12:42:01,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:42:01,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-09-14 12:42:01,478 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-09-14 12:42:01,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:01,478 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-09-14 12:42:01,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:01,478 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-09-14 12:42:01,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:01,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:01,479 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:01,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:01,680 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:01,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:01,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-09-14 12:42:01,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:01,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594315701] [2020-09-14 12:42:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:01,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594315701] [2020-09-14 12:42:01,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125235148] [2020-09-14 12:42:01,823 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 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 [2020-09-14 12:42:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:01,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:02,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:02,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:02,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664086345] [2020-09-14 12:42:02,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:02,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:02,155 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-09-14 12:42:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:03,057 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-09-14 12:42:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:42:03,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:03,059 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:42:03,059 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:42:03,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:42:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:42:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-09-14 12:42:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:42:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-09-14 12:42:03,064 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-09-14 12:42:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:03,064 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-09-14 12:42:03,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-09-14 12:42:03,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:03,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:03,065 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:03,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-09-14 12:42:03,276 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-09-14 12:42:03,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:03,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750501246] [2020-09-14 12:42:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:03,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750501246] [2020-09-14 12:42:03,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533502578] [2020-09-14 12:42:03,450 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 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 [2020-09-14 12:42:03,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:42:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:03,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:03,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:04,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:04,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:04,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655934092] [2020-09-14 12:42:04,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:04,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:04,980 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-09-14 12:42:09,440 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:24,286 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-09-14 12:42:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:42:24,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:24,287 INFO L225 Difference]: With dead ends: 264 [2020-09-14 12:42:24,287 INFO L226 Difference]: Without dead ends: 262 [2020-09-14 12:42:24,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=289, Invalid=699, Unknown=4, NotChecked=0, Total=992 [2020-09-14 12:42:24,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-14 12:42:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-09-14 12:42:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:42:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-14 12:42:24,291 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-14 12:42:24,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:24,292 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-14 12:42:24,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:24,292 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-14 12:42:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:24,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:24,292 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:24,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:24,493 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:24,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:24,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-09-14 12:42:24,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:24,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37236765] [2020-09-14 12:42:24,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:24,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37236765] [2020-09-14 12:42:24,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751506423] [2020-09-14 12:42:24,653 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 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 [2020-09-14 12:42:24,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:42:24,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:24,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:24,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:25,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:25,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:25,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202999642] [2020-09-14 12:42:25,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:25,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:25,056 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-14 12:42:25,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:25,954 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-09-14 12:42:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:42:25,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:25,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:25,956 INFO L225 Difference]: With dead ends: 255 [2020-09-14 12:42:25,956 INFO L226 Difference]: Without dead ends: 253 [2020-09-14 12:42:25,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:42:25,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-14 12:42:25,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-09-14 12:42:25,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:42:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:42:25,960 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:42:25,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:25,960 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:42:25,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:42:25,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:25,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:25,960 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:26,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:42:26,161 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:26,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-09-14 12:42:26,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:26,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123474769] [2020-09-14 12:42:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:26,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123474769] [2020-09-14 12:42:26,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438972681] [2020-09-14 12:42:26,309 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 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 [2020-09-14 12:42:26,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:42:26,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:26,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:42:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:26,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:26,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:26,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863353891] [2020-09-14 12:42:26,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:26,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:26,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:42:26,674 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:42:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:27,824 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-09-14 12:42:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:42:27,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:27,826 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:42:27,826 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:42:27,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:42:27,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:42:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-09-14 12:42:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:42:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:42:27,829 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:42:27,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:27,830 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:42:27,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:27,830 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:42:27,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:27,830 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:27,830 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:28,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-14 12:42:28,031 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:28,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:28,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-09-14 12:42:28,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:28,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779094727] [2020-09-14 12:42:28,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:28,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:28,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779094727] [2020-09-14 12:42:28,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065659607] [2020-09-14 12:42:28,183 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 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 [2020-09-14 12:42:28,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:42:28,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:28,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:29,246 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_mod_59 Int) (aux_div_59 Int) (aux_div_49 Int) (aux_div_54 Int)) (let ((.cse4 (* 2 aux_mod_59))) (let ((.cse3 (* 2 aux_div_49)) (.cse2 (+ .cse4 c_~i~0)) (.cse1 (+ .cse4 (* 2 aux_div_54))) (.cse0 (* 4 aux_div_59))) (and (<= aux_div_49 1) (< (+ .cse0 2) .cse1) (<= c_~j~0 (+ c_~i~0 aux_div_54)) (<= .cse2 (+ .cse0 .cse3 5)) (<= 0 aux_mod_59) (< aux_mod_59 2) (< (+ .cse0 .cse3 3) .cse2) (<= aux_div_59 1) (<= .cse1 (+ .cse0 4)))))) is different from true [2020-09-14 12:42:29,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:42:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:29,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:29,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:29,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554567458] [2020-09-14 12:42:29,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:29,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=160, Unknown=1, NotChecked=28, Total=272 [2020-09-14 12:42:29,437 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:42:29,823 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 17 [2020-09-14 12:42:33,869 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-09-14 12:42:39,933 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:40,100 INFO L93 Difference]: Finished difference Result 288 states and 693 transitions. [2020-09-14 12:42:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:42:40,101 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:40,101 INFO L225 Difference]: With dead ends: 288 [2020-09-14 12:42:40,102 INFO L226 Difference]: Without dead ends: 283 [2020-09-14 12:42:40,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=408, Invalid=923, Unknown=5, NotChecked=70, Total=1406 [2020-09-14 12:42:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-14 12:42:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 165. [2020-09-14 12:42:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:42:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-09-14 12:42:40,105 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-09-14 12:42:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:40,105 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-09-14 12:42:40,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-09-14 12:42:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:40,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:40,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:40,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-14 12:42:40,306 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:40,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-09-14 12:42:40,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:40,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216030611] [2020-09-14 12:42:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:40,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216030611] [2020-09-14 12:42:40,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812887804] [2020-09-14 12:42:40,500 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 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 [2020-09-14 12:42:40,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:42:40,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:42:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:40,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:43,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:43,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:43,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838633607] [2020-09-14 12:42:43,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:43,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:43,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:43,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:42:43,002 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-09-14 12:42:47,398 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:42:51,658 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:42:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:42:52,372 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-09-14 12:42:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:42:52,373 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:42:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:42:52,374 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:42:52,374 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:42:52,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-09-14 12:42:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:42:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-09-14 12:42:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:42:52,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:42:52,378 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:42:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:42:52,379 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:42:52,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:42:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:42:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:42:52,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:42:52,379 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:42:52,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-14 12:42:52,580 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:42:52,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:42:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-09-14 12:42:52,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:42:52,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131587272] [2020-09-14 12:42:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:42:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:52,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131587272] [2020-09-14 12:42:52,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726795654] [2020-09-14 12:42:52,753 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 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 [2020-09-14 12:42:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:42:52,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:42:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:42:56,047 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_~i~0_554 Int) (aux_div_70 Int) (aux_div_43 Int)) (let ((.cse0 (* 2 aux_div_70)) (.cse1 (* 2 aux_div_43))) (and (<= c_~j~0 (+ v_~i~0_554 .cse0 2)) (<= (+ c_~j~0 .cse1) (* 2 v_~i~0_554)) (<= v_~i~0_554 (+ .cse0 .cse1 3)) (<= aux_div_70 1) (<= aux_div_43 1) (<= (+ .cse0 .cse1 1) v_~i~0_554) (<= c_~i~0 (+ v_~i~0_554 c_~j~0))))) is different from true [2020-09-14 12:42:56,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:42:56,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:42:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:42:56,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:42:56,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:42:56,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941309781] [2020-09-14 12:42:56,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:42:56,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:42:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:42:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-09-14 12:42:56,129 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:42:56,517 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-09-14 12:43:00,669 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-14 12:43:03,694 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-09-14 12:43:07,839 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-14 12:43:15,204 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2020-09-14 12:43:15,376 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-09-14 12:43:19,277 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-09-14 12:43:25,167 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-09-14 12:43:27,401 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-09-14 12:43:32,878 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-09-14 12:43:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:32,940 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-09-14 12:43:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:43:32,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:32,943 INFO L225 Difference]: With dead ends: 292 [2020-09-14 12:43:32,943 INFO L226 Difference]: Without dead ends: 287 [2020-09-14 12:43:32,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=482, Invalid=1066, Unknown=16, NotChecked=76, Total=1640 [2020-09-14 12:43:32,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-09-14 12:43:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-09-14 12:43:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:43:32,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-09-14 12:43:32,946 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-09-14 12:43:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:32,946 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-09-14 12:43:32,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-09-14 12:43:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:32,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:32,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:33,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-09-14 12:43:33,148 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-09-14 12:43:33,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:33,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087683696] [2020-09-14 12:43:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:33,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087683696] [2020-09-14 12:43:33,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195608707] [2020-09-14 12:43:33,311 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 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 [2020-09-14 12:43:33,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:33,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:33,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:35,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:35,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:35,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:35,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009073170] [2020-09-14 12:43:35,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:35,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-09-14 12:43:35,739 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-09-14 12:43:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:37,599 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-09-14 12:43:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:37,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:37,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:37,601 INFO L225 Difference]: With dead ends: 292 [2020-09-14 12:43:37,601 INFO L226 Difference]: Without dead ends: 284 [2020-09-14 12:43:37,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-09-14 12:43:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-14 12:43:37,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-09-14 12:43:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:43:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-14 12:43:37,605 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-14 12:43:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:37,605 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-14 12:43:37,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-14 12:43:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:37,606 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:37,606 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:37,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-14 12:43:37,814 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-09-14 12:43:37,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:37,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228759736] [2020-09-14 12:43:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:37,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:37,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228759736] [2020-09-14 12:43:37,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509735373] [2020-09-14 12:43:37,973 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 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 [2020-09-14 12:43:38,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:43:38,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:38,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:38,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:38,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:38,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062699563] [2020-09-14 12:43:38,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:38,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:38,340 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-14 12:43:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:39,004 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-09-14 12:43:39,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:43:39,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:39,006 INFO L225 Difference]: With dead ends: 231 [2020-09-14 12:43:39,006 INFO L226 Difference]: Without dead ends: 229 [2020-09-14 12:43:39,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:43:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-09-14 12:43:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-09-14 12:43:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:43:39,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-09-14 12:43:39,009 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-09-14 12:43:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:39,010 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-09-14 12:43:39,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:39,010 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-09-14 12:43:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:39,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:39,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:39,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-09-14 12:43:39,211 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-09-14 12:43:39,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:39,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365596976] [2020-09-14 12:43:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:39,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365596976] [2020-09-14 12:43:39,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769126909] [2020-09-14 12:43:39,372 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 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 [2020-09-14 12:43:39,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:43:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:39,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:39,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:39,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133345424] [2020-09-14 12:43:39,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:39,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:39,782 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-09-14 12:43:41,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:41,035 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-09-14 12:43:41,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:43:41,037 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:41,038 INFO L225 Difference]: With dead ends: 250 [2020-09-14 12:43:41,038 INFO L226 Difference]: Without dead ends: 248 [2020-09-14 12:43:41,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:43:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-14 12:43:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-09-14 12:43:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-09-14 12:43:41,041 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-09-14 12:43:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:41,041 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-09-14 12:43:41,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-09-14 12:43:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:41,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:41,042 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:41,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:41,242 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-09-14 12:43:41,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:41,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299524034] [2020-09-14 12:43:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:41,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299524034] [2020-09-14 12:43:41,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358871275] [2020-09-14 12:43:41,406 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 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 [2020-09-14 12:43:41,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:43:41,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:41,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:41,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:41,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:41,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:41,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:41,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409896237] [2020-09-14 12:43:41,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:41,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:41,825 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-09-14 12:43:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:43,375 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-09-14 12:43:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:43,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:43,377 INFO L225 Difference]: With dead ends: 288 [2020-09-14 12:43:43,377 INFO L226 Difference]: Without dead ends: 283 [2020-09-14 12:43:43,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:43:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-14 12:43:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-09-14 12:43:43,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:43:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-09-14 12:43:43,380 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-09-14 12:43:43,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:43,381 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-09-14 12:43:43,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-09-14 12:43:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:43,381 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:43,381 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:43,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-09-14 12:43:43,582 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-09-14 12:43:43,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:43,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458440968] [2020-09-14 12:43:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:43,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458440968] [2020-09-14 12:43:43,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883226124] [2020-09-14 12:43:43,749 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 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 [2020-09-14 12:43:43,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:43:43,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:43,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:43,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:44,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:44,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:44,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272063774] [2020-09-14 12:43:44,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:44,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:44,062 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-09-14 12:43:44,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:44,681 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-09-14 12:43:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:43:44,682 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:44,683 INFO L225 Difference]: With dead ends: 236 [2020-09-14 12:43:44,683 INFO L226 Difference]: Without dead ends: 234 [2020-09-14 12:43:44,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:43:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-09-14 12:43:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-09-14 12:43:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:44,687 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:44,687 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:44,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:44,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:44,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:44,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:44,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:44,889 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:44,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-09-14 12:43:44,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:44,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652653082] [2020-09-14 12:43:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:45,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652653082] [2020-09-14 12:43:45,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260975786] [2020-09-14 12:43:45,044 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 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 [2020-09-14 12:43:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:45,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:45,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:45,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:45,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097972022] [2020-09-14 12:43:45,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:45,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:45,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:45,381 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:46,025 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-09-14 12:43:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:43:46,026 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:46,027 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:43:46,027 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:43:46,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:43:46,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:43:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-09-14 12:43:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:46,031 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:46,031 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:46,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:46,031 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:46,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:46,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:46,232 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:46,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-09-14 12:43:46,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:46,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519207659] [2020-09-14 12:43:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:46,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519207659] [2020-09-14 12:43:46,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482669539] [2020-09-14 12:43:46,394 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 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 [2020-09-14 12:43:46,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:46,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:46,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:46,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:46,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240855717] [2020-09-14 12:43:46,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:46,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:46,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:46,713 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:47,282 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-09-14 12:43:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:43:47,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:47,285 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:43:47,285 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:43:47,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:43:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:43:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-09-14 12:43:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:43:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-09-14 12:43:47,288 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-09-14 12:43:47,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:47,289 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-09-14 12:43:47,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-09-14 12:43:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:47,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:47,289 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:47,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:47,490 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:47,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-09-14 12:43:47,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:47,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798587094] [2020-09-14 12:43:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:47,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798587094] [2020-09-14 12:43:47,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442826865] [2020-09-14 12:43:47,645 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 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 [2020-09-14 12:43:47,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:43:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:47,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:47,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:47,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:47,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014930929] [2020-09-14 12:43:47,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:47,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:47,965 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-09-14 12:43:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:48,475 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-09-14 12:43:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:43:48,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:48,478 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:43:48,478 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:43:48,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:43:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:43:48,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-14 12:43:48,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:43:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-14 12:43:48,481 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-14 12:43:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:48,481 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-14 12:43:48,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-14 12:43:48,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:48,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:48,482 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:48,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-14 12:43:48,683 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-09-14 12:43:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:48,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887184311] [2020-09-14 12:43:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:48,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887184311] [2020-09-14 12:43:48,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240346982] [2020-09-14 12:43:48,841 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 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 [2020-09-14 12:43:48,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:43:48,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:48,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:49,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:49,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:49,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720573974] [2020-09-14 12:43:49,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:49,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:49,146 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-14 12:43:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:50,146 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-09-14 12:43:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:50,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:50,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:50,148 INFO L225 Difference]: With dead ends: 261 [2020-09-14 12:43:50,148 INFO L226 Difference]: Without dead ends: 259 [2020-09-14 12:43:50,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:43:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-14 12:43:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-09-14 12:43:50,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:43:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-09-14 12:43:50,152 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-09-14 12:43:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:50,152 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-09-14 12:43:50,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-09-14 12:43:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:50,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:50,153 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:50,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:50,354 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-09-14 12:43:50,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:50,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048919837] [2020-09-14 12:43:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:50,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048919837] [2020-09-14 12:43:50,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978965193] [2020-09-14 12:43:50,517 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 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 [2020-09-14 12:43:50,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:50,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:50,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:50,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:50,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:50,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251305757] [2020-09-14 12:43:50,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:50,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:50,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:50,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:50,844 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-09-14 12:43:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:51,837 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-09-14 12:43:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:43:51,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:51,839 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:43:51,839 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:43:51,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:43:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:43:51,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-09-14 12:43:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:43:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-09-14 12:43:51,843 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-09-14 12:43:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:51,843 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-09-14 12:43:51,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-09-14 12:43:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:51,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:51,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:52,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-14 12:43:52,045 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-09-14 12:43:52,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:52,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394328700] [2020-09-14 12:43:52,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:52,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394328700] [2020-09-14 12:43:52,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64830833] [2020-09-14 12:43:52,203 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 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 [2020-09-14 12:43:52,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:43:52,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:52,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:52,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:52,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:52,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87184477] [2020-09-14 12:43:52,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:52,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:52,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:52,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:52,498 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-09-14 12:43:53,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:53,313 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-09-14 12:43:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:43:53,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:53,316 INFO L225 Difference]: With dead ends: 253 [2020-09-14 12:43:53,316 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:43:53,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:43:53,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:43:53,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-09-14 12:43:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:43:53,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-14 12:43:53,319 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-14 12:43:53,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:53,320 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-14 12:43:53,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:53,320 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-14 12:43:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:53,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:53,320 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:53,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-14 12:43:53,521 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:53,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-09-14 12:43:53,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:53,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612384579] [2020-09-14 12:43:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:53,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612384579] [2020-09-14 12:43:53,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964888910] [2020-09-14 12:43:53,698 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 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 [2020-09-14 12:43:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:53,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:54,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:54,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:54,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426052077] [2020-09-14 12:43:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:54,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:54,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:54,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:54,011 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-14 12:43:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:55,141 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-09-14 12:43:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:43:55,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:55,144 INFO L225 Difference]: With dead ends: 268 [2020-09-14 12:43:55,144 INFO L226 Difference]: Without dead ends: 266 [2020-09-14 12:43:55,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:43:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-14 12:43:55,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-09-14 12:43:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:43:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:43:55,148 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:43:55,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:55,148 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:43:55,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:43:55,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:55,148 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:55,148 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:55,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:43:55,349 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:55,350 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-09-14 12:43:55,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:55,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680805404] [2020-09-14 12:43:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:55,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680805404] [2020-09-14 12:43:55,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172954043] [2020-09-14 12:43:55,521 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 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 [2020-09-14 12:43:55,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:43:55,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:55,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:55,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:55,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:55,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946127403] [2020-09-14 12:43:55,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:55,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:55,835 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:43:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:56,997 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-09-14 12:43:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:43:56,999 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:57,000 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:43:57,000 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:43:57,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:43:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:43:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-14 12:43:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:43:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-14 12:43:57,004 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-14 12:43:57,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:57,004 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-14 12:43:57,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-14 12:43:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:57,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:57,005 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:57,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-14 12:43:57,206 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:57,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:57,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-09-14 12:43:57,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:57,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649131656] [2020-09-14 12:43:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:57,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649131656] [2020-09-14 12:43:57,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407030557] [2020-09-14 12:43:57,379 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 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 [2020-09-14 12:43:57,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:43:57,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:57,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:57,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:57,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810850707] [2020-09-14 12:43:57,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:57,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:57,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:57,701 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-14 12:43:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:43:58,804 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-09-14 12:43:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:43:58,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:43:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:43:58,807 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:43:58,807 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:43:58,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:43:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:43:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-09-14 12:43:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:43:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:43:58,811 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:43:58,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:43:58,811 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:43:58,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:43:58,811 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:43:58,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:43:58,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:43:58,812 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:43:59,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-09-14 12:43:59,013 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:43:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:43:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-09-14 12:43:59,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:43:59,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159501254] [2020-09-14 12:43:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:43:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:43:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:59,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159501254] [2020-09-14 12:43:59,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57154004] [2020-09-14 12:43:59,177 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 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 [2020-09-14 12:43:59,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:43:59,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:43:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:43:59,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:43:59,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:43:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:43:59,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:43:59,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:43:59,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347172762] [2020-09-14 12:43:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:43:59,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:43:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:43:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:43:59,457 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:00,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:00,480 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-09-14 12:44:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:44:00,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:00,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:00,482 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:44:00,482 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:44:00,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:44:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:44:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-09-14 12:44:00,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:00,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:44:00,485 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:44:00,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:00,486 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:44:00,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:00,486 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:44:00,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:00,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:00,486 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:00,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:00,687 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:00,687 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-09-14 12:44:00,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:00,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723549569] [2020-09-14 12:44:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:00,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723549569] [2020-09-14 12:44:00,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176436864] [2020-09-14 12:44:00,852 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 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 [2020-09-14 12:44:00,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:00,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:00,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:00,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:01,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:01,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:01,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:01,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416340245] [2020-09-14 12:44:01,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:01,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:01,178 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:02,601 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-09-14 12:44:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:44:02,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:02,604 INFO L225 Difference]: With dead ends: 287 [2020-09-14 12:44:02,604 INFO L226 Difference]: Without dead ends: 282 [2020-09-14 12:44:02,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-14 12:44:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-09-14 12:44:02,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-09-14 12:44:02,608 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-09-14 12:44:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:02,608 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-09-14 12:44:02,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-09-14 12:44:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:02,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:02,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:02,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:02,809 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-09-14 12:44:02,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:02,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390417041] [2020-09-14 12:44:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:03,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390417041] [2020-09-14 12:44:03,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165266353] [2020-09-14 12:44:03,008 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 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 [2020-09-14 12:44:03,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:44:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:03,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:03,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:03,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80970218] [2020-09-14 12:44:03,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:03,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:03,501 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-09-14 12:44:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:04,814 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-09-14 12:44:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:44:04,816 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:04,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:04,816 INFO L225 Difference]: With dead ends: 284 [2020-09-14 12:44:04,816 INFO L226 Difference]: Without dead ends: 282 [2020-09-14 12:44:04,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:44:04,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-14 12:44:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-09-14 12:44:04,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:04,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-09-14 12:44:04,820 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-09-14 12:44:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:04,821 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-09-14 12:44:04,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-09-14 12:44:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:04,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:04,821 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:05,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:05,022 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:05,023 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-09-14 12:44:05,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:05,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725498345] [2020-09-14 12:44:05,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:05,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725498345] [2020-09-14 12:44:05,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160929652] [2020-09-14 12:44:05,192 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 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 [2020-09-14 12:44:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:05,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:05,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:05,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:05,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:05,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541456993] [2020-09-14 12:44:05,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:05,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:05,541 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-09-14 12:44:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:07,026 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-09-14 12:44:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:44:07,028 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:07,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:07,029 INFO L225 Difference]: With dead ends: 289 [2020-09-14 12:44:07,029 INFO L226 Difference]: Without dead ends: 284 [2020-09-14 12:44:07,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:44:07,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-09-14 12:44:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-09-14 12:44:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-14 12:44:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-09-14 12:44:07,032 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-09-14 12:44:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:07,033 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-09-14 12:44:07,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-09-14 12:44:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:07,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:07,033 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:07,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:07,234 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-09-14 12:44:07,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:07,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337190089] [2020-09-14 12:44:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:07,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337190089] [2020-09-14 12:44:07,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827832166] [2020-09-14 12:44:07,400 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 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 [2020-09-14 12:44:07,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:44:07,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:07,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:07,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:07,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:07,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:07,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:07,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705897664] [2020-09-14 12:44:07,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:07,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:07,704 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-09-14 12:44:09,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:09,515 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-09-14 12:44:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:09,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:09,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:09,517 INFO L225 Difference]: With dead ends: 312 [2020-09-14 12:44:09,517 INFO L226 Difference]: Without dead ends: 304 [2020-09-14 12:44:09,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:44:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-14 12:44:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-09-14 12:44:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:44:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-09-14 12:44:09,521 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-09-14 12:44:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:09,521 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-09-14 12:44:09,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-09-14 12:44:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:09,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:09,522 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:09,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:09,723 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-09-14 12:44:09,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:09,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582681685] [2020-09-14 12:44:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:09,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582681685] [2020-09-14 12:44:09,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807015248] [2020-09-14 12:44:09,896 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 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 [2020-09-14 12:44:09,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:44:09,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:09,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:10,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:10,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:10,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296747628] [2020-09-14 12:44:10,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:10,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:10,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:10,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:10,185 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-09-14 12:44:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:11,226 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-09-14 12:44:11,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:44:11,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:11,229 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:44:11,229 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:44:11,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:44:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:44:11,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-09-14 12:44:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:11,233 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:11,233 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:11,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:11,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:11,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:11,234 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:11,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-14 12:44:11,434 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-09-14 12:44:11,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:11,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767000906] [2020-09-14 12:44:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:11,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767000906] [2020-09-14 12:44:11,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645066697] [2020-09-14 12:44:11,606 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 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 [2020-09-14 12:44:11,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:44:11,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:11,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:11,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:11,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:11,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:11,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185409446] [2020-09-14 12:44:11,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:11,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:11,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:11,917 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:13,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:13,123 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-09-14 12:44:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:44:13,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:13,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:13,126 INFO L225 Difference]: With dead ends: 271 [2020-09-14 12:44:13,126 INFO L226 Difference]: Without dead ends: 269 [2020-09-14 12:44:13,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:44:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-09-14 12:44:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-09-14 12:44:13,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:13,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:44:13,130 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:44:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:13,130 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:44:13,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:13,130 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:44:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:13,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:13,130 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:13,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-14 12:44:13,331 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:13,332 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-09-14 12:44:13,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:13,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395482687] [2020-09-14 12:44:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:13,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:13,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395482687] [2020-09-14 12:44:13,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856458504] [2020-09-14 12:44:13,512 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 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 [2020-09-14 12:44:13,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:13,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:13,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:13,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:13,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:13,806 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:13,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:13,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:13,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407687640] [2020-09-14 12:44:13,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:13,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:13,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:13,808 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:44:15,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:15,260 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-09-14 12:44:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:15,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:15,263 INFO L225 Difference]: With dead ends: 296 [2020-09-14 12:44:15,263 INFO L226 Difference]: Without dead ends: 288 [2020-09-14 12:44:15,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:44:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-09-14 12:44:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-09-14 12:44:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:44:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-14 12:44:15,266 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-14 12:44:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:15,266 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-14 12:44:15,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-14 12:44:15,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:15,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:15,267 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:15,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-09-14 12:44:15,467 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-09-14 12:44:15,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:15,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876367321] [2020-09-14 12:44:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:15,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876367321] [2020-09-14 12:44:15,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618614576] [2020-09-14 12:44:15,659 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 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 [2020-09-14 12:44:15,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:44:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:15,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:44:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:15,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:15,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:15,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114373575] [2020-09-14 12:44:15,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:15,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:15,940 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-14 12:44:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:17,314 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-09-14 12:44:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:44:17,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:17,316 INFO L225 Difference]: With dead ends: 298 [2020-09-14 12:44:17,316 INFO L226 Difference]: Without dead ends: 290 [2020-09-14 12:44:17,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:17,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-14 12:44:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-09-14 12:44:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-09-14 12:44:17,320 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-09-14 12:44:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:17,320 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-09-14 12:44:17,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:17,321 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-09-14 12:44:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:17,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:17,321 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:17,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-14 12:44:17,522 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:17,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-09-14 12:44:17,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:17,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475410248] [2020-09-14 12:44:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475410248] [2020-09-14 12:44:17,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473247384] [2020-09-14 12:44:17,697 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 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 [2020-09-14 12:44:17,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:17,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:17,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:17,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:17,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:17,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:17,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172917989] [2020-09-14 12:44:17,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:17,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:17,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:17,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:17,987 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-09-14 12:44:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:19,505 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-09-14 12:44:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:44:19,507 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:19,508 INFO L225 Difference]: With dead ends: 291 [2020-09-14 12:44:19,508 INFO L226 Difference]: Without dead ends: 283 [2020-09-14 12:44:19,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:44:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-09-14 12:44:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-09-14 12:44:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:19,512 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:19,512 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:19,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:19,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:19,513 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:19,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-09-14 12:44:19,714 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:19,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-09-14 12:44:19,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:19,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514180627] [2020-09-14 12:44:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:19,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514180627] [2020-09-14 12:44:19,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887354227] [2020-09-14 12:44:19,883 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 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 [2020-09-14 12:44:19,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:44:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:20,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:20,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:20,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524680345] [2020-09-14 12:44:20,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:20,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:20,235 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:21,525 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-09-14 12:44:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:44:21,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:21,528 INFO L225 Difference]: With dead ends: 265 [2020-09-14 12:44:21,528 INFO L226 Difference]: Without dead ends: 263 [2020-09-14 12:44:21,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:44:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-14 12:44:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-09-14 12:44:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:21,533 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:21,533 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:21,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:21,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:21,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:21,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:21,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:21,735 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-09-14 12:44:21,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:21,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345970496] [2020-09-14 12:44:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:21,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345970496] [2020-09-14 12:44:21,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773465982] [2020-09-14 12:44:21,920 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 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 [2020-09-14 12:44:21,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:44:21,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:21,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:22,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:22,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:22,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684931338] [2020-09-14 12:44:22,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:22,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:22,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:22,296 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-09-14 12:44:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:23,831 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-09-14 12:44:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:44:23,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:23,834 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:44:23,834 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:44:23,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:44:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:44:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-09-14 12:44:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:44:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:44:23,838 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:44:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:23,838 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:44:23,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:23,839 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:44:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:23,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:23,839 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:24,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-09-14 12:44:24,040 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-09-14 12:44:24,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:24,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335227277] [2020-09-14 12:44:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:24,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335227277] [2020-09-14 12:44:24,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322166172] [2020-09-14 12:44:24,227 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 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 [2020-09-14 12:44:24,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:44:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:24,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:24,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:24,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:24,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:24,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:44:24,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974436502] [2020-09-14 12:44:24,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:44:24,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:24,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:44:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:44:24,577 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:44:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:44:26,760 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-09-14 12:44:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:44:26,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:44:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:44:26,763 INFO L225 Difference]: With dead ends: 285 [2020-09-14 12:44:26,763 INFO L226 Difference]: Without dead ends: 280 [2020-09-14 12:44:26,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:44:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-14 12:44:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-09-14 12:44:26,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:44:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-09-14 12:44:26,767 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-09-14 12:44:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:44:26,767 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-09-14 12:44:26,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:44:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-09-14 12:44:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:44:26,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:44:26,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:44:26,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:44:26,968 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:44:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:44:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-09-14 12:44:26,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:44:26,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728835196] [2020-09-14 12:44:26,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:44:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:44:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:27,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728835196] [2020-09-14 12:44:27,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294245127] [2020-09-14 12:44:27,149 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 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 [2020-09-14 12:44:27,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:44:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:44:27,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:44:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:44:31,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:44:35,734 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 42 DAG size of output: 19 [2020-09-14 12:44:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:44:35,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:44:35,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:44:35,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204090594] [2020-09-14 12:44:35,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:44:35,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:44:35,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:44:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-09-14 12:44:35,738 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-09-14 12:44:39,969 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-09-14 12:44:44,597 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-14 12:44:47,221 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-09-14 12:44:49,487 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-14 12:45:15,074 WARN L193 SmtUtils]: Spent 4.62 s on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2020-09-14 12:45:25,567 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-14 12:46:10,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:10,524 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-09-14 12:46:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:46:10,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-14 12:46:10,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:10,526 INFO L225 Difference]: With dead ends: 302 [2020-09-14 12:46:10,526 INFO L226 Difference]: Without dead ends: 297 [2020-09-14 12:46:10,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 66.3s TimeCoverageRelationStatistics Valid=556, Invalid=1408, Unknown=16, NotChecked=0, Total=1980 [2020-09-14 12:46:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-09-14 12:46:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-09-14 12:46:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:46:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-09-14 12:46:10,531 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-09-14 12:46:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:10,531 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-09-14 12:46:10,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:46:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-09-14 12:46:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:10,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:10,532 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:10,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:10,733 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-09-14 12:46:10,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:10,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598627381] [2020-09-14 12:46:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:10,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598627381] [2020-09-14 12:46:10,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873678934] [2020-09-14 12:46:10,910 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 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 [2020-09-14 12:46:10,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:10,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:10,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:11,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:11,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:11,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54206926] [2020-09-14 12:46:11,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:11,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:11,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:11,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:11,242 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-09-14 12:46:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:11,840 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-09-14 12:46:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:46:11,842 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:11,843 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:46:11,843 INFO L226 Difference]: Without dead ends: 217 [2020-09-14 12:46:11,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:46:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-14 12:46:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-09-14 12:46:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-09-14 12:46:11,846 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-09-14 12:46:11,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:11,846 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-09-14 12:46:11,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:11,846 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-09-14 12:46:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:11,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:11,847 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:12,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:12,048 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:12,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:12,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-09-14 12:46:12,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:12,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203663135] [2020-09-14 12:46:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:12,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203663135] [2020-09-14 12:46:12,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61537046] [2020-09-14 12:46:12,245 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 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 [2020-09-14 12:46:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:12,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:12,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:12,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:12,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:12,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:12,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:12,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518095627] [2020-09-14 12:46:12,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:12,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:12,537 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-09-14 12:46:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:13,274 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-09-14 12:46:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:46:13,276 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:13,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:13,276 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:13,276 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:46:13,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:13,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:46:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-09-14 12:46:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-09-14 12:46:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-09-14 12:46:13,280 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-09-14 12:46:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:13,280 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-09-14 12:46:13,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-09-14 12:46:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:13,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:13,281 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:13,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-14 12:46:13,482 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:13,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:13,482 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-09-14 12:46:13,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:13,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037439637] [2020-09-14 12:46:13,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:13,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037439637] [2020-09-14 12:46:13,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635717613] [2020-09-14 12:46:13,674 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 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 [2020-09-14 12:46:13,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:13,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:13,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:14,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:14,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:14,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080225166] [2020-09-14 12:46:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:14,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:14,005 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-09-14 12:46:14,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:14,531 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-14 12:46:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:14,532 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:14,538 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:14,538 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:46:14,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:46:14,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:46:14,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-09-14 12:46:14,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-14 12:46:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-09-14 12:46:14,542 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-09-14 12:46:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:14,542 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-09-14 12:46:14,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-09-14 12:46:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:14,542 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:14,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-14 12:46:14,743 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:14,744 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-09-14 12:46:14,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:14,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216374310] [2020-09-14 12:46:14,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:14,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216374310] [2020-09-14 12:46:14,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399187650] [2020-09-14 12:46:14,939 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 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 [2020-09-14 12:46:14,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:14,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:15,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:15,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:15,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544539249] [2020-09-14 12:46:15,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:15,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:15,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:15,296 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-09-14 12:46:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:15,949 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-09-14 12:46:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:15,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:15,952 INFO L225 Difference]: With dead ends: 237 [2020-09-14 12:46:15,952 INFO L226 Difference]: Without dead ends: 235 [2020-09-14 12:46:15,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-14 12:46:15,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-09-14 12:46:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:46:15,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-09-14 12:46:15,955 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-09-14 12:46:15,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:15,955 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-09-14 12:46:15,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-09-14 12:46:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:15,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:15,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:16,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-14 12:46:16,159 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:16,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-09-14 12:46:16,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:16,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304505142] [2020-09-14 12:46:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:16,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304505142] [2020-09-14 12:46:16,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040526505] [2020-09-14 12:46:16,358 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 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 [2020-09-14 12:46:16,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:18,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:18,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:18,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899716282] [2020-09-14 12:46:18,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:18,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:18,428 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-09-14 12:46:19,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:19,343 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-14 12:46:19,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:46:19,345 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:19,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:19,346 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:46:19,346 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:46:19,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:19,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:46:19,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-09-14 12:46:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-09-14 12:46:19,353 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-09-14 12:46:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:19,353 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-09-14 12:46:19,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-09-14 12:46:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:19,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:19,354 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:19,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-14 12:46:19,555 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:19,555 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-09-14 12:46:19,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:19,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487374680] [2020-09-14 12:46:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:19,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487374680] [2020-09-14 12:46:19,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43782918] [2020-09-14 12:46:19,754 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 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 [2020-09-14 12:46:19,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:19,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:20,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:20,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:20,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745239875] [2020-09-14 12:46:20,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:20,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:20,112 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-09-14 12:46:20,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:20,741 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-09-14 12:46:20,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:46:20,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:20,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:20,744 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:20,744 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:20,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:46:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-09-14 12:46:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:46:20,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-09-14 12:46:20,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-09-14 12:46:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:20,748 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-09-14 12:46:20,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-09-14 12:46:20,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:20,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:20,748 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:20,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-14 12:46:20,949 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:20,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:20,950 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-09-14 12:46:20,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:20,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864587604] [2020-09-14 12:46:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:21,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864587604] [2020-09-14 12:46:21,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825499245] [2020-09-14 12:46:21,167 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 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 [2020-09-14 12:46:21,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:21,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:21,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:21,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:21,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962481082] [2020-09-14 12:46:21,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:21,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:21,519 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-09-14 12:46:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:22,107 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-09-14 12:46:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:22,109 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:22,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:22,110 INFO L225 Difference]: With dead ends: 239 [2020-09-14 12:46:22,110 INFO L226 Difference]: Without dead ends: 237 [2020-09-14 12:46:22,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:46:22,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-09-14 12:46:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-09-14 12:46:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:46:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-09-14 12:46:22,114 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-09-14 12:46:22,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:22,114 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-09-14 12:46:22,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-09-14 12:46:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:22,115 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:22,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-09-14 12:46:22,322 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-09-14 12:46:22,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:22,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635794201] [2020-09-14 12:46:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:22,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:22,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635794201] [2020-09-14 12:46:22,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060465125] [2020-09-14 12:46:22,593 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 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 [2020-09-14 12:46:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:22,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:22,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:22,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:22,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104540742] [2020-09-14 12:46:22,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:22,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:22,964 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-09-14 12:46:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:23,404 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-09-14 12:46:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:46:23,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:23,406 INFO L225 Difference]: With dead ends: 220 [2020-09-14 12:46:23,406 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:46:23,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:46:23,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:46:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-09-14 12:46:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:46:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-09-14 12:46:23,409 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-09-14 12:46:23,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:23,410 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-09-14 12:46:23,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:23,410 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-09-14 12:46:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:23,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:23,410 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:23,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-14 12:46:23,611 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:23,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-09-14 12:46:23,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:23,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874612903] [2020-09-14 12:46:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874612903] [2020-09-14 12:46:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697946702] [2020-09-14 12:46:23,799 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 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 [2020-09-14 12:46:23,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:23,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:24,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:24,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:24,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979167632] [2020-09-14 12:46:24,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:24,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:24,158 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-09-14 12:46:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:24,749 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-09-14 12:46:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:24,751 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:24,752 INFO L225 Difference]: With dead ends: 229 [2020-09-14 12:46:24,752 INFO L226 Difference]: Without dead ends: 227 [2020-09-14 12:46:24,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:24,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-14 12:46:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-09-14 12:46:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-09-14 12:46:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-09-14 12:46:24,756 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-09-14 12:46:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:24,756 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-09-14 12:46:24,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:24,756 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-09-14 12:46:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:24,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:24,756 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:24,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-09-14 12:46:24,957 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-09-14 12:46:24,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:24,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485608333] [2020-09-14 12:46:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:25,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485608333] [2020-09-14 12:46:25,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746702884] [2020-09-14 12:46:25,140 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 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 [2020-09-14 12:46:25,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:25,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:25,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:25,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:25,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:25,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991875297] [2020-09-14 12:46:25,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:25,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:25,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:25,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:25,521 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-09-14 12:46:26,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:26,160 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-09-14 12:46:26,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:46:26,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:26,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:26,162 INFO L225 Difference]: With dead ends: 233 [2020-09-14 12:46:26,162 INFO L226 Difference]: Without dead ends: 231 [2020-09-14 12:46:26,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:46:26,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-09-14 12:46:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-09-14 12:46:26,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-14 12:46:26,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-09-14 12:46:26,165 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-09-14 12:46:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:26,165 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-09-14 12:46:26,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-09-14 12:46:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:26,166 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:26,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:26,367 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:26,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:26,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-09-14 12:46:26,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:26,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968894102] [2020-09-14 12:46:26,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:26,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968894102] [2020-09-14 12:46:26,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708979577] [2020-09-14 12:46:26,548 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 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 [2020-09-14 12:46:26,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:26,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:26,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:28,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:28,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:28,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062160801] [2020-09-14 12:46:28,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:28,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:28,527 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-09-14 12:46:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:29,573 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-09-14 12:46:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:29,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:29,575 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:46:29,575 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:46:29,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:46:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:46:29,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-09-14 12:46:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-09-14 12:46:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-09-14 12:46:29,578 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-09-14 12:46:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:29,578 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-09-14 12:46:29,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-09-14 12:46:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:29,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:29,579 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:29,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:29,780 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-09-14 12:46:29,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:29,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446645420] [2020-09-14 12:46:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446645420] [2020-09-14 12:46:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438100063] [2020-09-14 12:46:29,961 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 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 [2020-09-14 12:46:30,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:30,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:30,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:30,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:30,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:30,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447911616] [2020-09-14 12:46:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:30,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:30,315 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-09-14 12:46:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:31,101 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-09-14 12:46:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:31,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:31,103 INFO L225 Difference]: With dead ends: 246 [2020-09-14 12:46:31,103 INFO L226 Difference]: Without dead ends: 244 [2020-09-14 12:46:31,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-14 12:46:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-09-14 12:46:31,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-14 12:46:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-09-14 12:46:31,106 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-09-14 12:46:31,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:31,107 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-09-14 12:46:31,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:31,107 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-09-14 12:46:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:31,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:31,107 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:31,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:31,308 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-09-14 12:46:31,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:31,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744047781] [2020-09-14 12:46:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:31,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744047781] [2020-09-14 12:46:31,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4568092] [2020-09-14 12:46:31,516 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 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 [2020-09-14 12:46:31,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:46:31,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:31,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:31,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:31,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:31,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372297695] [2020-09-14 12:46:31,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:31,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:31,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:31,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:31,865 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-09-14 12:46:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:32,634 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-09-14 12:46:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:32,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:32,636 INFO L225 Difference]: With dead ends: 250 [2020-09-14 12:46:32,636 INFO L226 Difference]: Without dead ends: 248 [2020-09-14 12:46:32,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:46:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-14 12:46:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-09-14 12:46:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:32,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-14 12:46:32,645 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-14 12:46:32,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:32,645 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-14 12:46:32,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:32,645 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-14 12:46:32,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:32,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:32,645 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:32,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-14 12:46:32,846 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-09-14 12:46:32,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:32,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091826801] [2020-09-14 12:46:32,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:33,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091826801] [2020-09-14 12:46:33,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415260129] [2020-09-14 12:46:33,033 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 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 [2020-09-14 12:46:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:33,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:33,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:33,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:33,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049373573] [2020-09-14 12:46:33,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:33,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:33,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:33,399 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-14 12:46:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:34,167 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-09-14 12:46:34,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:46:34,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:34,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:34,170 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:34,170 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:34,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-09-14 12:46:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:46:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-09-14 12:46:34,173 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-09-14 12:46:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:34,174 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-09-14 12:46:34,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-09-14 12:46:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:34,174 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:34,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:34,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:34,375 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:34,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-09-14 12:46:34,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:34,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749861509] [2020-09-14 12:46:34,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:34,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:34,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749861509] [2020-09-14 12:46:34,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457101724] [2020-09-14 12:46:34,566 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 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 [2020-09-14 12:46:34,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:34,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:34,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:36,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:36,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:36,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734056173] [2020-09-14 12:46:36,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:36,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:36,496 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-09-14 12:46:37,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:37,655 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-09-14 12:46:37,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:37,658 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:37,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:37,658 INFO L225 Difference]: With dead ends: 262 [2020-09-14 12:46:37,659 INFO L226 Difference]: Without dead ends: 260 [2020-09-14 12:46:37,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:46:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-14 12:46:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-09-14 12:46:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:46:37,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-14 12:46:37,663 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-14 12:46:37,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:37,663 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-14 12:46:37,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:37,663 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-14 12:46:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:37,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:37,664 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:37,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-14 12:46:37,865 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-09-14 12:46:37,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:37,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869862296] [2020-09-14 12:46:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:38,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869862296] [2020-09-14 12:46:38,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699223434] [2020-09-14 12:46:38,054 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 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 [2020-09-14 12:46:38,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:46:38,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:38,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:38,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:38,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:38,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755456000] [2020-09-14 12:46:38,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:38,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:38,414 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-14 12:46:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:39,388 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-09-14 12:46:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:46:39,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:39,390 INFO L225 Difference]: With dead ends: 254 [2020-09-14 12:46:39,391 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:46:39,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:46:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:46:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-09-14 12:46:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:46:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-09-14 12:46:39,394 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-09-14 12:46:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:39,394 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-09-14 12:46:39,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-09-14 12:46:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:39,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:39,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:39,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-14 12:46:39,596 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-09-14 12:46:39,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:39,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487638608] [2020-09-14 12:46:39,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:39,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487638608] [2020-09-14 12:46:39,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601655892] [2020-09-14 12:46:39,839 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 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 [2020-09-14 12:46:39,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:39,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:39,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:40,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:40,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:40,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090008451] [2020-09-14 12:46:40,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:40,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:40,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:40,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:40,306 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-09-14 12:46:41,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:41,287 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-09-14 12:46:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:41,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:41,289 INFO L225 Difference]: With dead ends: 248 [2020-09-14 12:46:41,289 INFO L226 Difference]: Without dead ends: 246 [2020-09-14 12:46:41,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:46:41,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-14 12:46:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-09-14 12:46:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:46:41,295 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:46:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:41,295 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:46:41,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:46:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:41,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:41,296 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:41,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:41,497 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-09-14 12:46:41,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:41,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334327508] [2020-09-14 12:46:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:41,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334327508] [2020-09-14 12:46:41,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052705] [2020-09-14 12:46:41,686 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 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 [2020-09-14 12:46:41,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:46:41,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:41,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:42,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:42,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:42,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389411808] [2020-09-14 12:46:42,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:42,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:42,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:42,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:42,039 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:46:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:43,113 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-09-14 12:46:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:46:43,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:43,115 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:46:43,116 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:46:43,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:46:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:46:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-09-14 12:46:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:43,120 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:43,120 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:43,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:43,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:43,121 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:43,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:43,322 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:43,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-09-14 12:46:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:43,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149715145] [2020-09-14 12:46:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:43,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149715145] [2020-09-14 12:46:43,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602110415] [2020-09-14 12:46:43,504 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 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 [2020-09-14 12:46:43,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:43,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:43,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:43,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:43,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:43,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:43,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924652889] [2020-09-14 12:46:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:43,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:43,798 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:44,508 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-09-14 12:46:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:46:44,511 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:44,512 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:46:44,512 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:46:44,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:46:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:46:44,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-09-14 12:46:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:44,515 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:44,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:44,515 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:44,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:44,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:44,516 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:44,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-09-14 12:46:44,717 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:44,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-09-14 12:46:44,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:44,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745483909] [2020-09-14 12:46:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:44,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745483909] [2020-09-14 12:46:44,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859023091] [2020-09-14 12:46:44,912 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 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 [2020-09-14 12:46:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:44,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:44,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:45,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:45,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:45,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:45,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876231265] [2020-09-14 12:46:45,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:45,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:45,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:45,291 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:46,711 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-09-14 12:46:46,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:46:46,713 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:46,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:46,714 INFO L225 Difference]: With dead ends: 286 [2020-09-14 12:46:46,714 INFO L226 Difference]: Without dead ends: 281 [2020-09-14 12:46:46,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:46:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-14 12:46:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-09-14 12:46:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:46:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-09-14 12:46:46,717 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-09-14 12:46:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:46,717 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-09-14 12:46:46,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-09-14 12:46:46,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:46,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:46,718 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:46,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:46,919 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:46,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:46,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-09-14 12:46:46,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:46,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005266843] [2020-09-14 12:46:46,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:47,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005266843] [2020-09-14 12:46:47,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690114380] [2020-09-14 12:46:47,126 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 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 [2020-09-14 12:46:47,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:46:47,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:47,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:47,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:47,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898990794] [2020-09-14 12:46:47,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:47,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:47,516 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-09-14 12:46:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:48,704 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-09-14 12:46:48,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:46:48,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:48,707 INFO L225 Difference]: With dead ends: 268 [2020-09-14 12:46:48,707 INFO L226 Difference]: Without dead ends: 266 [2020-09-14 12:46:48,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:46:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-14 12:46:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-09-14 12:46:48,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:48,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:48,711 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:48,711 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:48,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:48,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:48,711 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:48,712 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:48,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-09-14 12:46:48,912 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-09-14 12:46:48,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:48,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705992590] [2020-09-14 12:46:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:49,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705992590] [2020-09-14 12:46:49,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774930478] [2020-09-14 12:46:49,118 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 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 [2020-09-14 12:46:49,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:46:49,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:49,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:49,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:49,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:49,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:49,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:49,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153222551] [2020-09-14 12:46:49,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:49,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:49,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:49,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:49,518 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:51,228 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-09-14 12:46:51,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:51,231 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:51,231 INFO L225 Difference]: With dead ends: 296 [2020-09-14 12:46:51,231 INFO L226 Difference]: Without dead ends: 291 [2020-09-14 12:46:51,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:46:51,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-09-14 12:46:51,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-09-14 12:46:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-09-14 12:46:51,235 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-09-14 12:46:51,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:51,235 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-09-14 12:46:51,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:51,235 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-09-14 12:46:51,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:51,235 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:51,235 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:51,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:51,436 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:51,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:51,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-09-14 12:46:51,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:51,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2760419] [2020-09-14 12:46:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:51,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2760419] [2020-09-14 12:46:51,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980635170] [2020-09-14 12:46:51,644 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 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 [2020-09-14 12:46:51,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:46:51,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:51,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:51,988 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:46:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:52,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:52,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:52,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042596193] [2020-09-14 12:46:52,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:52,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:52,024 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-09-14 12:46:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:53,682 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-09-14 12:46:53,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:53,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:53,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:53,685 INFO L225 Difference]: With dead ends: 299 [2020-09-14 12:46:53,686 INFO L226 Difference]: Without dead ends: 294 [2020-09-14 12:46:53,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:46:53,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-14 12:46:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-09-14 12:46:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-09-14 12:46:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-09-14 12:46:53,690 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-09-14 12:46:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:53,690 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-09-14 12:46:53,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-09-14 12:46:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:53,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:53,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:53,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:53,892 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:53,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:53,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-09-14 12:46:53,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:53,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237625374] [2020-09-14 12:46:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:54,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237625374] [2020-09-14 12:46:54,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025539423] [2020-09-14 12:46:54,087 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 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 [2020-09-14 12:46:54,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:46:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:54,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:54,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:54,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:54,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778783765] [2020-09-14 12:46:54,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:54,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:54,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:54,722 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-09-14 12:46:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:56,307 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-09-14 12:46:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:56,308 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:56,309 INFO L225 Difference]: With dead ends: 274 [2020-09-14 12:46:56,309 INFO L226 Difference]: Without dead ends: 272 [2020-09-14 12:46:56,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:46:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-14 12:46:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-09-14 12:46:56,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:46:56,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-09-14 12:46:56,314 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-09-14 12:46:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:56,315 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-09-14 12:46:56,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-09-14 12:46:56,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:56,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:56,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:56,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:46:56,525 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-09-14 12:46:56,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:56,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121568496] [2020-09-14 12:46:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:56,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121568496] [2020-09-14 12:46:56,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295637314] [2020-09-14 12:46:56,736 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 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 [2020-09-14 12:46:56,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:46:56,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:46:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:56,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:57,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:57,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:57,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115171338] [2020-09-14 12:46:57,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:57,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:57,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:57,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:57,218 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-09-14 12:46:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:46:58,939 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-09-14 12:46:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:46:58,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:46:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:46:58,943 INFO L225 Difference]: With dead ends: 282 [2020-09-14 12:46:58,943 INFO L226 Difference]: Without dead ends: 280 [2020-09-14 12:46:58,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:46:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-14 12:46:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-09-14 12:46:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:46:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-09-14 12:46:58,947 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-09-14 12:46:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:46:58,947 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-09-14 12:46:58,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:46:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-09-14 12:46:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:46:58,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:46:58,948 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:46:59,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-14 12:46:59,153 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:46:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:46:59,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-09-14 12:46:59,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:46:59,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113584150] [2020-09-14 12:46:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:46:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:59,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113584150] [2020-09-14 12:46:59,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348619628] [2020-09-14 12:46:59,361 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 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 [2020-09-14 12:46:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:46:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:46:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:46:59,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:46:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:46:59,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:46:59,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:46:59,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189529591] [2020-09-14 12:46:59,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:46:59,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:46:59,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:46:59,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:46:59,815 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-09-14 12:47:02,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:02,006 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-09-14 12:47:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:47:02,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:02,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:02,010 INFO L225 Difference]: With dead ends: 321 [2020-09-14 12:47:02,010 INFO L226 Difference]: Without dead ends: 313 [2020-09-14 12:47:02,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:47:02,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-14 12:47:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-09-14 12:47:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:47:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-09-14 12:47:02,015 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-09-14 12:47:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:02,015 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-09-14 12:47:02,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-09-14 12:47:02,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:02,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:02,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:02,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-14 12:47:02,217 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:02,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:02,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-09-14 12:47:02,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:02,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038823160] [2020-09-14 12:47:02,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:02,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038823160] [2020-09-14 12:47:02,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910767321] [2020-09-14 12:47:02,430 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 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 [2020-09-14 12:47:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:47:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:06,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:07,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:07,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:07,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734349497] [2020-09-14 12:47:07,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:07,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:07,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-09-14 12:47:07,056 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-09-14 12:47:11,909 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-09-14 12:47:16,086 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-09-14 12:47:20,449 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-09-14 12:47:24,785 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-09-14 12:47:26,901 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-09-14 12:47:31,660 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-09-14 12:47:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:32,634 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-09-14 12:47:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:47:32,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:32,637 INFO L225 Difference]: With dead ends: 323 [2020-09-14 12:47:32,637 INFO L226 Difference]: Without dead ends: 315 [2020-09-14 12:47:32,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-09-14 12:47:32,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-14 12:47:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-09-14 12:47:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-09-14 12:47:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-09-14 12:47:32,641 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-09-14 12:47:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:32,641 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-09-14 12:47:32,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-09-14 12:47:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:32,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:32,642 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:32,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-09-14 12:47:32,843 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:32,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:32,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 225 times [2020-09-14 12:47:32,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:32,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027923278] [2020-09-14 12:47:32,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:33,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027923278] [2020-09-14 12:47:33,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050953432] [2020-09-14 12:47:33,064 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 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 [2020-09-14 12:47:33,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:47:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:33,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:33,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:33,492 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:33,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:47:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:33,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:33,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:33,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416900228] [2020-09-14 12:47:33,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:33,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:33,560 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-09-14 12:47:36,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:36,225 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-09-14 12:47:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:47:36,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:36,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:36,227 INFO L225 Difference]: With dead ends: 320 [2020-09-14 12:47:36,227 INFO L226 Difference]: Without dead ends: 312 [2020-09-14 12:47:36,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:47:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-14 12:47:36,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 170. [2020-09-14 12:47:36,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:47:36,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 431 transitions. [2020-09-14 12:47:36,231 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 431 transitions. Word has length 14 [2020-09-14 12:47:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:36,231 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 431 transitions. [2020-09-14 12:47:36,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 431 transitions. [2020-09-14 12:47:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:36,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:36,232 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:36,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-14 12:47:36,439 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:36,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1310533370, now seen corresponding path program 226 times [2020-09-14 12:47:36,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:36,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270423953] [2020-09-14 12:47:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:36,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270423953] [2020-09-14 12:47:36,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360038120] [2020-09-14 12:47:36,659 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 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 [2020-09-14 12:47:36,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:47:36,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:36,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:36,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:37,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:37,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:37,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719639428] [2020-09-14 12:47:37,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:37,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:37,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:37,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:37,076 INFO L87 Difference]: Start difference. First operand 170 states and 431 transitions. Second operand 17 states. [2020-09-14 12:47:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:38,062 INFO L93 Difference]: Finished difference Result 256 states and 599 transitions. [2020-09-14 12:47:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:47:38,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:38,065 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:47:38,065 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:47:38,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:47:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:47:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 168. [2020-09-14 12:47:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:47:38,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 425 transitions. [2020-09-14 12:47:38,068 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 425 transitions. Word has length 14 [2020-09-14 12:47:38,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:38,068 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 425 transitions. [2020-09-14 12:47:38,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:38,068 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 425 transitions. [2020-09-14 12:47:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:38,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:38,068 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:38,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2020-09-14 12:47:38,269 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:38,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1289978541, now seen corresponding path program 227 times [2020-09-14 12:47:38,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:38,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815730956] [2020-09-14 12:47:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:38,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:38,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815730956] [2020-09-14 12:47:38,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045044222] [2020-09-14 12:47:38,470 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 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 [2020-09-14 12:47:38,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:47:38,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:38,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:38,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:38,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:38,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871005125] [2020-09-14 12:47:38,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:38,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:38,842 INFO L87 Difference]: Start difference. First operand 168 states and 425 transitions. Second operand 17 states. [2020-09-14 12:47:40,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:40,377 INFO L93 Difference]: Finished difference Result 294 states and 688 transitions. [2020-09-14 12:47:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:47:40,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:40,381 INFO L225 Difference]: With dead ends: 294 [2020-09-14 12:47:40,381 INFO L226 Difference]: Without dead ends: 292 [2020-09-14 12:47:40,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=389, Invalid=943, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:47:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-14 12:47:40,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 166. [2020-09-14 12:47:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 423 transitions. [2020-09-14 12:47:40,385 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 423 transitions. Word has length 14 [2020-09-14 12:47:40,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:40,385 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 423 transitions. [2020-09-14 12:47:40,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:40,385 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 423 transitions. [2020-09-14 12:47:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:40,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:40,385 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:40,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:40,586 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:40,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1289977580, now seen corresponding path program 228 times [2020-09-14 12:47:40,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:40,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800976386] [2020-09-14 12:47:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:40,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800976386] [2020-09-14 12:47:40,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899265903] [2020-09-14 12:47:40,808 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 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 [2020-09-14 12:47:40,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:47:40,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:41,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:41,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:41,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676051620] [2020-09-14 12:47:41,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:41,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:41,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:41,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:41,199 INFO L87 Difference]: Start difference. First operand 166 states and 423 transitions. Second operand 17 states. [2020-09-14 12:47:42,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:42,440 INFO L93 Difference]: Finished difference Result 266 states and 625 transitions. [2020-09-14 12:47:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:47:42,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:42,443 INFO L225 Difference]: With dead ends: 266 [2020-09-14 12:47:42,443 INFO L226 Difference]: Without dead ends: 264 [2020-09-14 12:47:42,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=806, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:47:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-14 12:47:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 164. [2020-09-14 12:47:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:47:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-14 12:47:42,447 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-14 12:47:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:42,447 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-14 12:47:42,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-14 12:47:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:42,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:42,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:42,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:42,649 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:42,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1289315451, now seen corresponding path program 229 times [2020-09-14 12:47:42,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:42,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790481861] [2020-09-14 12:47:42,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790481861] [2020-09-14 12:47:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567289679] [2020-09-14 12:47:42,856 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 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 [2020-09-14 12:47:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:43,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:43,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:43,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25560626] [2020-09-14 12:47:43,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:43,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:43,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:43,236 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-14 12:47:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:44,834 INFO L93 Difference]: Finished difference Result 275 states and 656 transitions. [2020-09-14 12:47:44,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:47:44,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:44,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:44,837 INFO L225 Difference]: With dead ends: 275 [2020-09-14 12:47:44,837 INFO L226 Difference]: Without dead ends: 273 [2020-09-14 12:47:44,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=407, Invalid=999, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:47:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-14 12:47:44,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-09-14 12:47:44,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:47:44,841 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:47:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:44,841 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:47:44,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:47:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:44,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:44,842 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:45,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:45,043 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:45,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:45,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1289294092, now seen corresponding path program 230 times [2020-09-14 12:47:45,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:45,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963709616] [2020-09-14 12:47:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:45,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963709616] [2020-09-14 12:47:45,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989506371] [2020-09-14 12:47:45,259 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 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 [2020-09-14 12:47:45,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:47:45,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:45,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:45,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:45,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:45,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:45,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:45,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415639977] [2020-09-14 12:47:45,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:45,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:45,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:45,589 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:47:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:47,154 INFO L93 Difference]: Finished difference Result 285 states and 690 transitions. [2020-09-14 12:47:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:47:47,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:47,157 INFO L225 Difference]: With dead ends: 285 [2020-09-14 12:47:47,157 INFO L226 Difference]: Without dead ends: 277 [2020-09-14 12:47:47,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=482, Invalid=1240, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:47:47,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-09-14 12:47:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 166. [2020-09-14 12:47:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:47:47,161 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:47:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:47,161 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:47:47,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:47,161 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:47:47,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:47,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:47,167 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:47,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2020-09-14 12:47:47,371 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:47,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:47,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1289293131, now seen corresponding path program 231 times [2020-09-14 12:47:47,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:47,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131752185] [2020-09-14 12:47:47,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131752185] [2020-09-14 12:47:47,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141321176] [2020-09-14 12:47:47,577 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 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 [2020-09-14 12:47:47,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:47:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:47,925 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:47:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:48,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:48,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:48,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539897330] [2020-09-14 12:47:48,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:48,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:48,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:48,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:48,022 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:47:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:49,997 INFO L93 Difference]: Finished difference Result 307 states and 744 transitions. [2020-09-14 12:47:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:47:50,000 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:50,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:50,000 INFO L225 Difference]: With dead ends: 307 [2020-09-14 12:47:50,000 INFO L226 Difference]: Without dead ends: 299 [2020-09-14 12:47:50,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:47:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-14 12:47:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-09-14 12:47:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:47:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 417 transitions. [2020-09-14 12:47:50,009 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 417 transitions. Word has length 14 [2020-09-14 12:47:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:50,010 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 417 transitions. [2020-09-14 12:47:50,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 417 transitions. [2020-09-14 12:47:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:50,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:50,010 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:50,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:50,211 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:50,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:50,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1289285660, now seen corresponding path program 232 times [2020-09-14 12:47:50,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:50,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677738718] [2020-09-14 12:47:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:50,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677738718] [2020-09-14 12:47:50,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496484540] [2020-09-14 12:47:50,430 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 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 [2020-09-14 12:47:50,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:47:50,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:50,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:50,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:50,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:50,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875760162] [2020-09-14 12:47:50,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:50,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:50,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:50,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:50,830 INFO L87 Difference]: Start difference. First operand 164 states and 417 transitions. Second operand 17 states. [2020-09-14 12:47:52,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:52,333 INFO L93 Difference]: Finished difference Result 280 states and 668 transitions. [2020-09-14 12:47:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:47:52,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:52,337 INFO L225 Difference]: With dead ends: 280 [2020-09-14 12:47:52,337 INFO L226 Difference]: Without dead ends: 278 [2020-09-14 12:47:52,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:47:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-09-14 12:47:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 166. [2020-09-14 12:47:52,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-09-14 12:47:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 424 transitions. [2020-09-14 12:47:52,340 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 424 transitions. Word has length 14 [2020-09-14 12:47:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:52,341 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 424 transitions. [2020-09-14 12:47:52,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:52,341 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 424 transitions. [2020-09-14 12:47:52,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:52,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:52,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:52,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2020-09-14 12:47:52,542 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:52,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:52,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1289264301, now seen corresponding path program 233 times [2020-09-14 12:47:52,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:52,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790070602] [2020-09-14 12:47:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:52,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790070602] [2020-09-14 12:47:52,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062598821] [2020-09-14 12:47:52,773 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 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 [2020-09-14 12:47:52,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:47:52,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:52,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:53,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:53,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:53,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:53,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878202572] [2020-09-14 12:47:53,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:53,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:53,137 INFO L87 Difference]: Start difference. First operand 166 states and 424 transitions. Second operand 17 states. [2020-09-14 12:47:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:54,845 INFO L93 Difference]: Finished difference Result 315 states and 764 transitions. [2020-09-14 12:47:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:47:54,847 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:54,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:54,848 INFO L225 Difference]: With dead ends: 315 [2020-09-14 12:47:54,848 INFO L226 Difference]: Without dead ends: 307 [2020-09-14 12:47:54,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:47:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-09-14 12:47:54,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 164. [2020-09-14 12:47:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-14 12:47:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 414 transitions. [2020-09-14 12:47:54,852 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 414 transitions. Word has length 14 [2020-09-14 12:47:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:54,852 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 414 transitions. [2020-09-14 12:47:54,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 414 transitions. [2020-09-14 12:47:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:54,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:54,852 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:55,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:47:55,053 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:55,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:55,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1289263340, now seen corresponding path program 234 times [2020-09-14 12:47:55,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:55,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62823344] [2020-09-14 12:47:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:55,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62823344] [2020-09-14 12:47:55,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608589001] [2020-09-14 12:47:55,271 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 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 [2020-09-14 12:47:55,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:47:55,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:47:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:55,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:47:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:55,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:55,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:55,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908142680] [2020-09-14 12:47:55,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:55,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:55,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:55,631 INFO L87 Difference]: Start difference. First operand 164 states and 414 transitions. Second operand 17 states. [2020-09-14 12:47:57,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:47:57,587 INFO L93 Difference]: Finished difference Result 312 states and 754 transitions. [2020-09-14 12:47:57,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:47:57,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:47:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:47:57,590 INFO L225 Difference]: With dead ends: 312 [2020-09-14 12:47:57,591 INFO L226 Difference]: Without dead ends: 304 [2020-09-14 12:47:57,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:47:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-14 12:47:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 157. [2020-09-14 12:47:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-14 12:47:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 391 transitions. [2020-09-14 12:47:57,594 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 391 transitions. Word has length 14 [2020-09-14 12:47:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:47:57,594 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 391 transitions. [2020-09-14 12:47:57,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:47:57,594 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 391 transitions. [2020-09-14 12:47:57,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:47:57,595 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:47:57,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:47:57,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-14 12:47:57,796 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:47:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:47:57,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1288370571, now seen corresponding path program 235 times [2020-09-14 12:47:57,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:47:57,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317708578] [2020-09-14 12:47:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:47:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:58,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317708578] [2020-09-14 12:47:58,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311904104] [2020-09-14 12:47:58,014 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 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 [2020-09-14 12:47:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:47:58,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:47:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:47:58,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:47:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:47:58,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:47:58,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:47:58,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474317051] [2020-09-14 12:47:58,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:47:58,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:47:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:47:58,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:47:58,389 INFO L87 Difference]: Start difference. First operand 157 states and 391 transitions. Second operand 17 states. [2020-09-14 12:48:00,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:00,671 INFO L93 Difference]: Finished difference Result 307 states and 730 transitions. [2020-09-14 12:48:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:48:00,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:00,674 INFO L225 Difference]: With dead ends: 307 [2020-09-14 12:48:00,675 INFO L226 Difference]: Without dead ends: 299 [2020-09-14 12:48:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:48:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-14 12:48:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 155. [2020-09-14 12:48:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-09-14 12:48:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 381 transitions. [2020-09-14 12:48:00,678 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 381 transitions. Word has length 14 [2020-09-14 12:48:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 381 transitions. [2020-09-14 12:48:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 381 transitions. [2020-09-14 12:48:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:00,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:00,679 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:00,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable268,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:00,880 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -423000859, now seen corresponding path program 236 times [2020-09-14 12:48:00,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:00,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001358984] [2020-09-14 12:48:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:01,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001358984] [2020-09-14 12:48:01,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718817068] [2020-09-14 12:48:01,133 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 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 [2020-09-14 12:48:01,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:48:01,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:01,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:01,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:01,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:01,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:01,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452792908] [2020-09-14 12:48:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:01,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:01,536 INFO L87 Difference]: Start difference. First operand 155 states and 381 transitions. Second operand 17 states. [2020-09-14 12:48:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:02,201 INFO L93 Difference]: Finished difference Result 225 states and 519 transitions. [2020-09-14 12:48:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:48:02,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:02,205 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:48:02,205 INFO L226 Difference]: Without dead ends: 223 [2020-09-14 12:48:02,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:48:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-09-14 12:48:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 153. [2020-09-14 12:48:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-14 12:48:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 376 transitions. [2020-09-14 12:48:02,209 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 376 transitions. Word has length 14 [2020-09-14 12:48:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:02,209 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 376 transitions. [2020-09-14 12:48:02,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 376 transitions. [2020-09-14 12:48:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:02,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:02,209 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:02,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-14 12:48:02,411 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:02,412 INFO L82 PathProgramCache]: Analyzing trace with hash -401551339, now seen corresponding path program 237 times [2020-09-14 12:48:02,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:02,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617478989] [2020-09-14 12:48:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:02,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617478989] [2020-09-14 12:48:02,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673938142] [2020-09-14 12:48:02,639 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 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 [2020-09-14 12:48:02,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:48:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:03,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:03,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:03,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:03,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966637098] [2020-09-14 12:48:03,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:03,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:03,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:03,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:03,051 INFO L87 Difference]: Start difference. First operand 153 states and 376 transitions. Second operand 17 states. [2020-09-14 12:48:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:03,808 INFO L93 Difference]: Finished difference Result 223 states and 512 transitions. [2020-09-14 12:48:03,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:48:03,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:03,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:03,812 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:48:03,812 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:48:03,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:48:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:48:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-09-14 12:48:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-14 12:48:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 371 transitions. [2020-09-14 12:48:03,815 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 371 transitions. Word has length 14 [2020-09-14 12:48:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:03,815 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 371 transitions. [2020-09-14 12:48:03,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 371 transitions. [2020-09-14 12:48:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:03,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:03,816 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:04,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2020-09-14 12:48:04,017 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:04,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:04,017 INFO L82 PathProgramCache]: Analyzing trace with hash -400888249, now seen corresponding path program 238 times [2020-09-14 12:48:04,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:04,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683464085] [2020-09-14 12:48:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683464085] [2020-09-14 12:48:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615860444] [2020-09-14 12:48:04,227 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 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 [2020-09-14 12:48:04,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:04,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:04,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:04,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574349638] [2020-09-14 12:48:04,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:04,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:04,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:04,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:04,803 INFO L87 Difference]: Start difference. First operand 151 states and 371 transitions. Second operand 17 states. [2020-09-14 12:48:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:05,643 INFO L93 Difference]: Finished difference Result 221 states and 510 transitions. [2020-09-14 12:48:05,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:48:05,645 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:05,645 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:48:05,645 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:48:05,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:48:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:48:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 152. [2020-09-14 12:48:05,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-14 12:48:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 373 transitions. [2020-09-14 12:48:05,653 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 373 transitions. Word has length 14 [2020-09-14 12:48:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:05,654 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 373 transitions. [2020-09-14 12:48:05,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 373 transitions. [2020-09-14 12:48:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:05,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:05,654 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:05,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:05,855 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash -400865929, now seen corresponding path program 239 times [2020-09-14 12:48:05,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:05,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145812377] [2020-09-14 12:48:05,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:06,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145812377] [2020-09-14 12:48:06,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306116215] [2020-09-14 12:48:06,066 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 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 [2020-09-14 12:48:06,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:48:06,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:06,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:06,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:06,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:48:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:08,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:08,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-14 12:48:08,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132423301] [2020-09-14 12:48:08,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:48:08,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:08,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:48:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=213, Unknown=1, NotChecked=0, Total=306 [2020-09-14 12:48:08,225 INFO L87 Difference]: Start difference. First operand 152 states and 373 transitions. Second operand 18 states. [2020-09-14 12:48:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:27,988 INFO L93 Difference]: Finished difference Result 252 states and 586 transitions. [2020-09-14 12:48:28,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:48:28,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-14 12:48:28,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:28,014 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:48:28,014 INFO L226 Difference]: Without dead ends: 247 [2020-09-14 12:48:28,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=334, Invalid=720, Unknown=2, NotChecked=0, Total=1056 [2020-09-14 12:48:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-14 12:48:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2020-09-14 12:48:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-14 12:48:28,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 366 transitions. [2020-09-14 12:48:28,017 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 366 transitions. Word has length 14 [2020-09-14 12:48:28,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:28,017 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 366 transitions. [2020-09-14 12:48:28,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:48:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 366 transitions. [2020-09-14 12:48:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:28,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:28,017 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:28,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:28,218 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash -400837099, now seen corresponding path program 240 times [2020-09-14 12:48:28,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:28,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102556664] [2020-09-14 12:48:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:28,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102556664] [2020-09-14 12:48:28,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451571110] [2020-09-14 12:48:28,451 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 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 [2020-09-14 12:48:28,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:48:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:48:28,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:28,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:28,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:28,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-14 12:48:28,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106235224] [2020-09-14 12:48:28,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:48:28,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:28,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:48:28,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:48:28,869 INFO L87 Difference]: Start difference. First operand 150 states and 366 transitions. Second operand 17 states. [2020-09-14 12:48:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:29,874 INFO L93 Difference]: Finished difference Result 225 states and 522 transitions. [2020-09-14 12:48:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:48:29,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-14 12:48:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:29,878 INFO L225 Difference]: With dead ends: 225 [2020-09-14 12:48:29,878 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:48:29,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:48:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:48:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2020-09-14 12:48:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-14 12:48:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 342 transitions. [2020-09-14 12:48:29,881 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 342 transitions. Word has length 14 [2020-09-14 12:48:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:29,881 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 342 transitions. [2020-09-14 12:48:29,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:48:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 342 transitions. [2020-09-14 12:48:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:29,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:29,882 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:30,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:30,083 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1019616642, now seen corresponding path program 7 times [2020-09-14 12:48:30,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:30,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298727666] [2020-09-14 12:48:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:30,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:30,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298727666] [2020-09-14 12:48:30,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241412151] [2020-09-14 12:48:30,367 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 [2020-09-14 12:48:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:30,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:30,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:30,849 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:48:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:30,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:30,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-09-14 12:48:30,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121059228] [2020-09-14 12:48:30,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:48:30,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:48:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:48:30,964 INFO L87 Difference]: Start difference. First operand 146 states and 342 transitions. Second operand 20 states. [2020-09-14 12:48:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:31,448 INFO L93 Difference]: Finished difference Result 206 states and 480 transitions. [2020-09-14 12:48:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:48:31,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-09-14 12:48:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:31,450 INFO L225 Difference]: With dead ends: 206 [2020-09-14 12:48:31,451 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:48:31,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:48:31,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:48:31,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2020-09-14 12:48:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-14 12:48:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 383 transitions. [2020-09-14 12:48:31,454 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 383 transitions. Word has length 14 [2020-09-14 12:48:31,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:31,454 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 383 transitions. [2020-09-14 12:48:31,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:48:31,454 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 383 transitions. [2020-09-14 12:48:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:31,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:31,455 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:31,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:31,656 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:31,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1046764459, now seen corresponding path program 28 times [2020-09-14 12:48:31,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:31,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257755355] [2020-09-14 12:48:31,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:32,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257755355] [2020-09-14 12:48:32,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992171054] [2020-09-14 12:48:32,089 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 [2020-09-14 12:48:32,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:32,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:32,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:32,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:32,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:32,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:32,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684236662] [2020-09-14 12:48:32,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:32,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:32,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:32,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:32,615 INFO L87 Difference]: Start difference. First operand 156 states and 383 transitions. Second operand 19 states. [2020-09-14 12:48:32,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:32,775 INFO L93 Difference]: Finished difference Result 204 states and 479 transitions. [2020-09-14 12:48:32,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:48:32,778 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:32,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:32,779 INFO L225 Difference]: With dead ends: 204 [2020-09-14 12:48:32,779 INFO L226 Difference]: Without dead ends: 201 [2020-09-14 12:48:32,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-14 12:48:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2020-09-14 12:48:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:48:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-14 12:48:32,782 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-14 12:48:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:32,782 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-14 12:48:32,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-14 12:48:32,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:32,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:32,783 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:32,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2020-09-14 12:48:32,984 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:32,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:32,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1739755227, now seen corresponding path program 29 times [2020-09-14 12:48:32,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:32,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987443423] [2020-09-14 12:48:32,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:33,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987443423] [2020-09-14 12:48:33,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317604883] [2020-09-14 12:48:33,378 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 [2020-09-14 12:48:33,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:48:33,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:33,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:33,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:33,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:33,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254739472] [2020-09-14 12:48:33,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:33,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:33,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:33,863 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-14 12:48:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:34,009 INFO L93 Difference]: Finished difference Result 224 states and 518 transitions. [2020-09-14 12:48:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:48:34,011 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:34,012 INFO L225 Difference]: With dead ends: 224 [2020-09-14 12:48:34,012 INFO L226 Difference]: Without dead ends: 221 [2020-09-14 12:48:34,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:48:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-14 12:48:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2020-09-14 12:48:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-14 12:48:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 409 transitions. [2020-09-14 12:48:34,016 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 409 transitions. Word has length 14 [2020-09-14 12:48:34,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:34,016 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 409 transitions. [2020-09-14 12:48:34,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 409 transitions. [2020-09-14 12:48:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:34,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:34,017 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:34,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:34,226 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 792278443, now seen corresponding path program 30 times [2020-09-14 12:48:34,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:34,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684389393] [2020-09-14 12:48:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:34,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684389393] [2020-09-14 12:48:34,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394869493] [2020-09-14 12:48:34,607 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 [2020-09-14 12:48:34,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:48:34,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:34,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:34,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:35,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:35,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:35,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193648868] [2020-09-14 12:48:35,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:35,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:35,108 INFO L87 Difference]: Start difference. First operand 167 states and 409 transitions. Second operand 19 states. [2020-09-14 12:48:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:35,374 INFO L93 Difference]: Finished difference Result 223 states and 518 transitions. [2020-09-14 12:48:35,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:48:35,382 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:35,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:35,382 INFO L225 Difference]: With dead ends: 223 [2020-09-14 12:48:35,382 INFO L226 Difference]: Without dead ends: 220 [2020-09-14 12:48:35,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:48:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-14 12:48:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 168. [2020-09-14 12:48:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-14 12:48:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 414 transitions. [2020-09-14 12:48:35,385 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 414 transitions. Word has length 14 [2020-09-14 12:48:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:35,386 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 414 transitions. [2020-09-14 12:48:35,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 414 transitions. [2020-09-14 12:48:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:35,386 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:35,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-14 12:48:35,587 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash -69569317, now seen corresponding path program 31 times [2020-09-14 12:48:35,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:35,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351516404] [2020-09-14 12:48:35,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:35,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:35,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351516404] [2020-09-14 12:48:35,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966352416] [2020-09-14 12:48:35,933 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 [2020-09-14 12:48:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:35,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:36,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:36,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:36,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494694214] [2020-09-14 12:48:36,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:36,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:36,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:36,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:36,421 INFO L87 Difference]: Start difference. First operand 168 states and 414 transitions. Second operand 19 states. [2020-09-14 12:48:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:36,760 INFO L93 Difference]: Finished difference Result 222 states and 518 transitions. [2020-09-14 12:48:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:48:36,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:36,763 INFO L225 Difference]: With dead ends: 222 [2020-09-14 12:48:36,764 INFO L226 Difference]: Without dead ends: 219 [2020-09-14 12:48:36,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:48:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-14 12:48:36,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 169. [2020-09-14 12:48:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-09-14 12:48:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 419 transitions. [2020-09-14 12:48:36,767 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 419 transitions. Word has length 14 [2020-09-14 12:48:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:36,767 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 419 transitions. [2020-09-14 12:48:36,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 419 transitions. [2020-09-14 12:48:36,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:36,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:36,768 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:36,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:36,968 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash 595365803, now seen corresponding path program 32 times [2020-09-14 12:48:36,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:36,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070887564] [2020-09-14 12:48:36,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070887564] [2020-09-14 12:48:37,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005957883] [2020-09-14 12:48:37,288 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 [2020-09-14 12:48:37,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:48:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:37,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:37,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:37,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:37,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732101986] [2020-09-14 12:48:37,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:37,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:37,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:37,776 INFO L87 Difference]: Start difference. First operand 169 states and 419 transitions. Second operand 19 states. [2020-09-14 12:48:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:38,250 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-09-14 12:48:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:48:38,253 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:38,254 INFO L225 Difference]: With dead ends: 221 [2020-09-14 12:48:38,254 INFO L226 Difference]: Without dead ends: 218 [2020-09-14 12:48:38,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:48:38,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-14 12:48:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 170. [2020-09-14 12:48:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:48:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 424 transitions. [2020-09-14 12:48:38,258 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 424 transitions. Word has length 14 [2020-09-14 12:48:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:38,258 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 424 transitions. [2020-09-14 12:48:38,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 424 transitions. [2020-09-14 12:48:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:38,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:38,259 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:38,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-14 12:48:38,459 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:38,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash 616815323, now seen corresponding path program 33 times [2020-09-14 12:48:38,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:38,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124735561] [2020-09-14 12:48:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:38,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124735561] [2020-09-14 12:48:38,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409015466] [2020-09-14 12:48:38,765 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 [2020-09-14 12:48:38,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:48:38,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:38,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:39,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:39,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:39,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614769263] [2020-09-14 12:48:39,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:39,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:39,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:39,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:39,264 INFO L87 Difference]: Start difference. First operand 170 states and 424 transitions. Second operand 19 states. [2020-09-14 12:48:39,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:39,724 INFO L93 Difference]: Finished difference Result 220 states and 518 transitions. [2020-09-14 12:48:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:48:39,726 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:39,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:39,727 INFO L225 Difference]: With dead ends: 220 [2020-09-14 12:48:39,727 INFO L226 Difference]: Without dead ends: 217 [2020-09-14 12:48:39,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:48:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-09-14 12:48:39,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 172. [2020-09-14 12:48:39,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-14 12:48:39,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 431 transitions. [2020-09-14 12:48:39,731 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 431 transitions. Word has length 14 [2020-09-14 12:48:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:39,731 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 431 transitions. [2020-09-14 12:48:39,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 431 transitions. [2020-09-14 12:48:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:39,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:39,732 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:39,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:39,933 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash 617507243, now seen corresponding path program 34 times [2020-09-14 12:48:39,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:39,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352860907] [2020-09-14 12:48:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:40,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352860907] [2020-09-14 12:48:40,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801289139] [2020-09-14 12:48:40,344 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 [2020-09-14 12:48:40,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:40,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:40,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:40,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:40,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:40,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455705483] [2020-09-14 12:48:40,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:40,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:40,913 INFO L87 Difference]: Start difference. First operand 172 states and 431 transitions. Second operand 19 states. [2020-09-14 12:48:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:41,508 INFO L93 Difference]: Finished difference Result 219 states and 518 transitions. [2020-09-14 12:48:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:48:41,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:41,511 INFO L225 Difference]: With dead ends: 219 [2020-09-14 12:48:41,511 INFO L226 Difference]: Without dead ends: 216 [2020-09-14 12:48:41,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:48:41,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-14 12:48:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 174. [2020-09-14 12:48:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:48:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 438 transitions. [2020-09-14 12:48:41,514 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 438 transitions. Word has length 14 [2020-09-14 12:48:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 438 transitions. [2020-09-14 12:48:41,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 438 transitions. [2020-09-14 12:48:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:48:41,515 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:41,515 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:41,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:41,716 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 617529563, now seen corresponding path program 35 times [2020-09-14 12:48:41,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:41,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117625151] [2020-09-14 12:48:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:41,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117625151] [2020-09-14 12:48:41,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697411425] [2020-09-14 12:48:41,985 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 [2020-09-14 12:48:42,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:48:42,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:42,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:48:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:42,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:42,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:42,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121083228] [2020-09-14 12:48:42,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:42,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:42,513 INFO L87 Difference]: Start difference. First operand 174 states and 438 transitions. Second operand 19 states. [2020-09-14 12:48:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:43,241 INFO L93 Difference]: Finished difference Result 228 states and 542 transitions. [2020-09-14 12:48:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:48:43,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-09-14 12:48:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:43,244 INFO L225 Difference]: With dead ends: 228 [2020-09-14 12:48:43,244 INFO L226 Difference]: Without dead ends: 222 [2020-09-14 12:48:43,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:48:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-14 12:48:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 170. [2020-09-14 12:48:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-14 12:48:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-14 12:48:43,248 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 14 [2020-09-14 12:48:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:43,249 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-14 12:48:43,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:43,249 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-14 12:48:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:48:43,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:43,249 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:43,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2020-09-14 12:48:43,458 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1771658259, now seen corresponding path program 241 times [2020-09-14 12:48:43,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:43,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811130314] [2020-09-14 12:48:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:43,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:43,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811130314] [2020-09-14 12:48:43,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111486168] [2020-09-14 12:48:43,769 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 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 [2020-09-14 12:48:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:43,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:43,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:44,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:44,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:44,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626694684] [2020-09-14 12:48:44,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:44,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:44,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:44,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:44,300 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 19 states. [2020-09-14 12:48:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:44,460 INFO L93 Difference]: Finished difference Result 213 states and 518 transitions. [2020-09-14 12:48:44,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:48:44,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:48:44,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:44,464 INFO L225 Difference]: With dead ends: 213 [2020-09-14 12:48:44,464 INFO L226 Difference]: Without dead ends: 211 [2020-09-14 12:48:44,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-14 12:48:44,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 180. [2020-09-14 12:48:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-14 12:48:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 462 transitions. [2020-09-14 12:48:44,467 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 462 transitions. Word has length 15 [2020-09-14 12:48:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:44,468 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 462 transitions. [2020-09-14 12:48:44,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 462 transitions. [2020-09-14 12:48:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:48:44,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:44,468 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:44,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:44,669 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:44,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1771657298, now seen corresponding path program 242 times [2020-09-14 12:48:44,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:44,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420163667] [2020-09-14 12:48:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:44,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420163667] [2020-09-14 12:48:44,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133451261] [2020-09-14 12:48:44,971 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 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 [2020-09-14 12:48:45,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:48:45,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:45,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:45,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:45,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:45,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875183623] [2020-09-14 12:48:45,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:45,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:45,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:45,506 INFO L87 Difference]: Start difference. First operand 180 states and 462 transitions. Second operand 19 states. [2020-09-14 12:48:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:46,169 INFO L93 Difference]: Finished difference Result 226 states and 544 transitions. [2020-09-14 12:48:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:48:46,171 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:48:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:46,172 INFO L225 Difference]: With dead ends: 226 [2020-09-14 12:48:46,172 INFO L226 Difference]: Without dead ends: 224 [2020-09-14 12:48:46,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:48:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-14 12:48:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 178. [2020-09-14 12:48:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-14 12:48:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-14 12:48:46,176 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-14 12:48:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:46,176 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-14 12:48:46,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-14 12:48:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:48:46,177 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:46,177 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:46,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:46,378 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1771628468, now seen corresponding path program 243 times [2020-09-14 12:48:46,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:46,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185155050] [2020-09-14 12:48:46,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:46,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185155050] [2020-09-14 12:48:46,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586961507] [2020-09-14 12:48:46,692 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 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 [2020-09-14 12:48:46,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:48:46,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:46,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:46,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:50,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:50,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:50,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642907904] [2020-09-14 12:48:50,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:50,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:50,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:50,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:50,466 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-14 12:48:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:51,215 INFO L93 Difference]: Finished difference Result 241 states and 574 transitions. [2020-09-14 12:48:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:48:51,218 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:48:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:51,218 INFO L225 Difference]: With dead ends: 241 [2020-09-14 12:48:51,218 INFO L226 Difference]: Without dead ends: 239 [2020-09-14 12:48:51,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:48:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-09-14 12:48:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 176. [2020-09-14 12:48:51,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:48:51,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:48:51,222 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:48:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:51,222 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:48:51,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:48:51,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:48:51,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:51,223 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:51,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:51,424 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1770734738, now seen corresponding path program 244 times [2020-09-14 12:48:51,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:51,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977928417] [2020-09-14 12:48:51,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:51,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977928417] [2020-09-14 12:48:51,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572782935] [2020-09-14 12:48:51,723 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 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 [2020-09-14 12:48:51,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:48:51,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:52,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:52,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:52,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459954468] [2020-09-14 12:48:52,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:52,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:48:52,319 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:48:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:48:53,215 INFO L93 Difference]: Finished difference Result 243 states and 578 transitions. [2020-09-14 12:48:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:48:53,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:48:53,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:48:53,219 INFO L225 Difference]: With dead ends: 243 [2020-09-14 12:48:53,220 INFO L226 Difference]: Without dead ends: 241 [2020-09-14 12:48:53,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=458, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:48:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-14 12:48:53,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 178. [2020-09-14 12:48:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-14 12:48:53,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 456 transitions. [2020-09-14 12:48:53,223 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 456 transitions. Word has length 15 [2020-09-14 12:48:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:48:53,224 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 456 transitions. [2020-09-14 12:48:53,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:48:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 456 transitions. [2020-09-14 12:48:53,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:48:53,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:48:53,224 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:48:53,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:48:53,425 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:48:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:48:53,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1770733777, now seen corresponding path program 245 times [2020-09-14 12:48:53,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:48:53,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65386849] [2020-09-14 12:48:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:48:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:48:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:53,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65386849] [2020-09-14 12:48:53,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769330370] [2020-09-14 12:48:53,728 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 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 [2020-09-14 12:48:53,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:48:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:48:53,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:48:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:48:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:48:56,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:48:56,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:48:56,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346161187] [2020-09-14 12:48:56,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:48:56,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:48:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:48:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=236, Unknown=1, NotChecked=0, Total=342 [2020-09-14 12:48:56,447 INFO L87 Difference]: Start difference. First operand 178 states and 456 transitions. Second operand 19 states. [2020-09-14 12:49:00,820 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-09-14 12:49:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:01,558 INFO L93 Difference]: Finished difference Result 253 states and 599 transitions. [2020-09-14 12:49:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:49:01,561 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:01,562 INFO L225 Difference]: With dead ends: 253 [2020-09-14 12:49:01,562 INFO L226 Difference]: Without dead ends: 251 [2020-09-14 12:49:01,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=231, Invalid=470, Unknown=1, NotChecked=0, Total=702 [2020-09-14 12:49:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-09-14 12:49:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2020-09-14 12:49:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:49:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:49:01,565 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:49:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:01,565 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:49:01,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:49:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:01,566 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:01,566 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:01,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-14 12:49:01,767 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1770704947, now seen corresponding path program 246 times [2020-09-14 12:49:01,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:01,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025336731] [2020-09-14 12:49:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:02,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025336731] [2020-09-14 12:49:02,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977879137] [2020-09-14 12:49:02,073 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 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 [2020-09-14 12:49:02,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:49:02,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:02,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:02,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:02,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:02,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16501641] [2020-09-14 12:49:02,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:02,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:02,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:02,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:02,735 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:49:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:03,703 INFO L93 Difference]: Finished difference Result 247 states and 589 transitions. [2020-09-14 12:49:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:49:03,707 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:03,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:03,707 INFO L225 Difference]: With dead ends: 247 [2020-09-14 12:49:03,707 INFO L226 Difference]: Without dead ends: 245 [2020-09-14 12:49:03,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:49:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-14 12:49:03,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 174. [2020-09-14 12:49:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-14 12:49:03,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 444 transitions. [2020-09-14 12:49:03,711 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 444 transitions. Word has length 15 [2020-09-14 12:49:03,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:03,711 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 444 transitions. [2020-09-14 12:49:03,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 444 transitions. [2020-09-14 12:49:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:03,712 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:03,712 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:03,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-14 12:49:03,916 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:03,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1743029108, now seen corresponding path program 247 times [2020-09-14 12:49:03,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:03,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618064772] [2020-09-14 12:49:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:04,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618064772] [2020-09-14 12:49:04,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463872741] [2020-09-14 12:49:04,223 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 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 [2020-09-14 12:49:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:04,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:08,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:08,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:08,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212857520] [2020-09-14 12:49:08,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:08,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:08,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:08,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:08,909 INFO L87 Difference]: Start difference. First operand 174 states and 444 transitions. Second operand 19 states. [2020-09-14 12:49:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:09,990 INFO L93 Difference]: Finished difference Result 245 states and 582 transitions. [2020-09-14 12:49:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:49:09,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:09,993 INFO L225 Difference]: With dead ends: 245 [2020-09-14 12:49:09,993 INFO L226 Difference]: Without dead ends: 243 [2020-09-14 12:49:09,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:49:09,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-09-14 12:49:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 177. [2020-09-14 12:49:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:49:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 453 transitions. [2020-09-14 12:49:09,998 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 453 transitions. Word has length 15 [2020-09-14 12:49:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:09,998 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 453 transitions. [2020-09-14 12:49:09,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 453 transitions. [2020-09-14 12:49:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:09,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:09,999 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:10,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-14 12:49:10,199 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:10,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1743028147, now seen corresponding path program 248 times [2020-09-14 12:49:10,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:10,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383415312] [2020-09-14 12:49:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:10,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:10,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383415312] [2020-09-14 12:49:10,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724132409] [2020-09-14 12:49:10,512 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 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 [2020-09-14 12:49:10,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:49:10,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:10,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:10,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:15,251 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-09-14 12:49:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:19,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:19,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:19,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274237620] [2020-09-14 12:49:19,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:19,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:19,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=237, Unknown=2, NotChecked=0, Total=342 [2020-09-14 12:49:19,455 INFO L87 Difference]: Start difference. First operand 177 states and 453 transitions. Second operand 19 states. [2020-09-14 12:49:19,931 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-09-14 12:49:22,267 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 41 [2020-09-14 12:49:23,499 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-09-14 12:49:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:25,400 INFO L93 Difference]: Finished difference Result 251 states and 595 transitions. [2020-09-14 12:49:25,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:49:25,403 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:25,404 INFO L225 Difference]: With dead ends: 251 [2020-09-14 12:49:25,404 INFO L226 Difference]: Without dead ends: 249 [2020-09-14 12:49:25,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=248, Invalid=506, Unknown=2, NotChecked=0, Total=756 [2020-09-14 12:49:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-09-14 12:49:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 176. [2020-09-14 12:49:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:49:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:49:25,407 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:49:25,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:25,407 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:49:25,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:25,407 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:49:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:25,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:25,408 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:25,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:49:25,609 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1742999317, now seen corresponding path program 249 times [2020-09-14 12:49:25,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:25,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317803575] [2020-09-14 12:49:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317803575] [2020-09-14 12:49:25,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230747995] [2020-09-14 12:49:25,935 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 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 [2020-09-14 12:49:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:49:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:41,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:41,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:41,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:41,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638438144] [2020-09-14 12:49:41,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:41,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=231, Unknown=6, NotChecked=0, Total=342 [2020-09-14 12:49:41,541 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:49:45,978 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-14 12:49:50,247 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2020-09-14 12:49:52,542 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-09-14 12:49:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:54,944 INFO L93 Difference]: Finished difference Result 252 states and 600 transitions. [2020-09-14 12:49:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:49:54,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:54,948 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:49:54,948 INFO L226 Difference]: Without dead ends: 252 [2020-09-14 12:49:54,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=253, Invalid=497, Unknown=6, NotChecked=0, Total=756 [2020-09-14 12:49:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-14 12:49:54,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 183. [2020-09-14 12:49:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-14 12:49:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-09-14 12:49:54,952 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 15 [2020-09-14 12:49:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:54,957 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-09-14 12:49:54,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-09-14 12:49:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:54,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:54,958 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:55,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2020-09-14 12:49:55,159 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1742104626, now seen corresponding path program 250 times [2020-09-14 12:49:55,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:55,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558905384] [2020-09-14 12:49:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:55,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558905384] [2020-09-14 12:49:55,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846213612] [2020-09-14 12:49:55,463 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 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 [2020-09-14 12:49:55,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:49:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:55,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:57,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:57,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:57,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313888572] [2020-09-14 12:49:57,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:57,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:57,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:57,394 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 19 states. [2020-09-14 12:49:58,158 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-09-14 12:49:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:49:58,696 INFO L93 Difference]: Finished difference Result 266 states and 631 transitions. [2020-09-14 12:49:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:49:58,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:49:58,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:49:58,700 INFO L225 Difference]: With dead ends: 266 [2020-09-14 12:49:58,700 INFO L226 Difference]: Without dead ends: 264 [2020-09-14 12:49:58,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=246, Invalid=510, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:49:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-09-14 12:49:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 181. [2020-09-14 12:49:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-09-14 12:49:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 463 transitions. [2020-09-14 12:49:58,704 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 463 transitions. Word has length 15 [2020-09-14 12:49:58,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:49:58,704 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 463 transitions. [2020-09-14 12:49:58,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:49:58,704 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 463 transitions. [2020-09-14 12:49:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:49:58,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:49:58,705 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:49:58,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2020-09-14 12:49:58,906 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:49:58,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:49:58,906 INFO L82 PathProgramCache]: Analyzing trace with hash -884154578, now seen corresponding path program 251 times [2020-09-14 12:49:58,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:49:58,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510362121] [2020-09-14 12:49:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:49:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:49:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:59,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510362121] [2020-09-14 12:49:59,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767997447] [2020-09-14 12:49:59,220 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 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 [2020-09-14 12:49:59,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:49:59,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:49:59,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:49:59,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:49:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:49:59,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:49:59,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:49:59,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567226600] [2020-09-14 12:49:59,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:49:59,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:49:59,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:49:59,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:49:59,751 INFO L87 Difference]: Start difference. First operand 181 states and 463 transitions. Second operand 19 states. [2020-09-14 12:50:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:00,913 INFO L93 Difference]: Finished difference Result 256 states and 609 transitions. [2020-09-14 12:50:00,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:00,915 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:00,916 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:50:00,916 INFO L226 Difference]: Without dead ends: 254 [2020-09-14 12:50:00,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-14 12:50:00,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 185. [2020-09-14 12:50:00,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-09-14 12:50:00,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 475 transitions. [2020-09-14 12:50:00,919 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 475 transitions. Word has length 15 [2020-09-14 12:50:00,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:00,919 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 475 transitions. [2020-09-14 12:50:00,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 475 transitions. [2020-09-14 12:50:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:00,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:00,920 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:01,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:01,121 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash -884153617, now seen corresponding path program 252 times [2020-09-14 12:50:01,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:01,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331302405] [2020-09-14 12:50:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:01,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331302405] [2020-09-14 12:50:01,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422484441] [2020-09-14 12:50:01,435 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 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 [2020-09-14 12:50:01,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:50:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:01,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:01,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:01,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957877967] [2020-09-14 12:50:02,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:02,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:02,001 INFO L87 Difference]: Start difference. First operand 185 states and 475 transitions. Second operand 19 states. [2020-09-14 12:50:03,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:03,341 INFO L93 Difference]: Finished difference Result 261 states and 619 transitions. [2020-09-14 12:50:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:03,346 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:03,346 INFO L225 Difference]: With dead ends: 261 [2020-09-14 12:50:03,346 INFO L226 Difference]: Without dead ends: 259 [2020-09-14 12:50:03,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:50:03,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-14 12:50:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 184. [2020-09-14 12:50:03,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-14 12:50:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 472 transitions. [2020-09-14 12:50:03,350 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 472 transitions. Word has length 15 [2020-09-14 12:50:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:03,350 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 472 transitions. [2020-09-14 12:50:03,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 472 transitions. [2020-09-14 12:50:03,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:03,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:03,351 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:03,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:03,552 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:03,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:03,552 INFO L82 PathProgramCache]: Analyzing trace with hash -884124787, now seen corresponding path program 253 times [2020-09-14 12:50:03,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:03,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865622481] [2020-09-14 12:50:03,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:03,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865622481] [2020-09-14 12:50:03,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353336202] [2020-09-14 12:50:03,920 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 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 [2020-09-14 12:50:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:03,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:04,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:04,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:04,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36197543] [2020-09-14 12:50:04,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:04,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:04,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:04,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:04,813 INFO L87 Difference]: Start difference. First operand 184 states and 472 transitions. Second operand 19 states. [2020-09-14 12:50:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:05,921 INFO L93 Difference]: Finished difference Result 260 states and 616 transitions. [2020-09-14 12:50:05,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:50:05,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:05,925 INFO L225 Difference]: With dead ends: 260 [2020-09-14 12:50:05,925 INFO L226 Difference]: Without dead ends: 258 [2020-09-14 12:50:05,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=267, Invalid=545, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:50:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-09-14 12:50:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 183. [2020-09-14 12:50:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-14 12:50:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 469 transitions. [2020-09-14 12:50:05,929 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 469 transitions. Word has length 15 [2020-09-14 12:50:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:05,930 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 469 transitions. [2020-09-14 12:50:05,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:05,930 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 469 transitions. [2020-09-14 12:50:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:05,930 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:05,930 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:06,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:06,131 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash -883231057, now seen corresponding path program 254 times [2020-09-14 12:50:06,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:06,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62621254] [2020-09-14 12:50:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:06,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62621254] [2020-09-14 12:50:06,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500221908] [2020-09-14 12:50:06,436 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 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 [2020-09-14 12:50:06,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:50:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:06,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:06,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:06,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141852854] [2020-09-14 12:50:06,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:06,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:06,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:06,977 INFO L87 Difference]: Start difference. First operand 183 states and 469 transitions. Second operand 19 states. [2020-09-14 12:50:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:08,109 INFO L93 Difference]: Finished difference Result 268 states and 634 transitions. [2020-09-14 12:50:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:50:08,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:08,112 INFO L225 Difference]: With dead ends: 268 [2020-09-14 12:50:08,112 INFO L226 Difference]: Without dead ends: 266 [2020-09-14 12:50:08,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=628, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-14 12:50:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 186. [2020-09-14 12:50:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-14 12:50:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-09-14 12:50:08,116 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 15 [2020-09-14 12:50:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:08,116 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-09-14 12:50:08,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-09-14 12:50:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:08,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:08,117 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:08,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2020-09-14 12:50:08,318 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash -883230096, now seen corresponding path program 255 times [2020-09-14 12:50:08,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:08,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745361416] [2020-09-14 12:50:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:08,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745361416] [2020-09-14 12:50:08,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670048176] [2020-09-14 12:50:08,625 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 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 [2020-09-14 12:50:08,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:50:08,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:08,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:09,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:09,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:09,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764044826] [2020-09-14 12:50:09,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:09,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:09,172 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 19 states. [2020-09-14 12:50:10,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:10,150 INFO L93 Difference]: Finished difference Result 272 states and 645 transitions. [2020-09-14 12:50:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:50:10,154 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:10,154 INFO L225 Difference]: With dead ends: 272 [2020-09-14 12:50:10,155 INFO L226 Difference]: Without dead ends: 270 [2020-09-14 12:50:10,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:50:10,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-14 12:50:10,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2020-09-14 12:50:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-14 12:50:10,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 484 transitions. [2020-09-14 12:50:10,159 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 484 transitions. Word has length 15 [2020-09-14 12:50:10,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:10,159 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 484 transitions. [2020-09-14 12:50:10,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 484 transitions. [2020-09-14 12:50:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:10,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:10,159 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:10,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:10,360 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash -883201266, now seen corresponding path program 256 times [2020-09-14 12:50:10,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:10,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643903689] [2020-09-14 12:50:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:10,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643903689] [2020-09-14 12:50:10,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463362043] [2020-09-14 12:50:10,674 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 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 [2020-09-14 12:50:10,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:50:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:10,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:11,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:11,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:11,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405611882] [2020-09-14 12:50:11,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:11,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:11,219 INFO L87 Difference]: Start difference. First operand 188 states and 484 transitions. Second operand 19 states. [2020-09-14 12:50:12,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:12,463 INFO L93 Difference]: Finished difference Result 272 states and 649 transitions. [2020-09-14 12:50:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:50:12,466 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:12,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:12,467 INFO L225 Difference]: With dead ends: 272 [2020-09-14 12:50:12,467 INFO L226 Difference]: Without dead ends: 270 [2020-09-14 12:50:12,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:50:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-14 12:50:12,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 186. [2020-09-14 12:50:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-14 12:50:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-09-14 12:50:12,471 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 15 [2020-09-14 12:50:12,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:12,471 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-09-14 12:50:12,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-09-14 12:50:12,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:12,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:12,472 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:12,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2020-09-14 12:50:12,673 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -855524466, now seen corresponding path program 257 times [2020-09-14 12:50:12,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:12,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051708544] [2020-09-14 12:50:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:12,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051708544] [2020-09-14 12:50:12,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055776647] [2020-09-14 12:50:12,980 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 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 [2020-09-14 12:50:13,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:50:13,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:13,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:13,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:13,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:13,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501430613] [2020-09-14 12:50:13,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:13,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:13,699 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 19 states. [2020-09-14 12:50:15,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:15,281 INFO L93 Difference]: Finished difference Result 264 states and 625 transitions. [2020-09-14 12:50:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:50:15,285 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:15,286 INFO L225 Difference]: With dead ends: 264 [2020-09-14 12:50:15,286 INFO L226 Difference]: Without dead ends: 262 [2020-09-14 12:50:15,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:50:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-14 12:50:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 186. [2020-09-14 12:50:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-14 12:50:15,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 478 transitions. [2020-09-14 12:50:15,294 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 478 transitions. Word has length 15 [2020-09-14 12:50:15,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:15,294 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 478 transitions. [2020-09-14 12:50:15,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:15,294 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 478 transitions. [2020-09-14 12:50:15,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:15,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:15,295 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:15,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-14 12:50:15,495 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:15,496 INFO L82 PathProgramCache]: Analyzing trace with hash -855495636, now seen corresponding path program 258 times [2020-09-14 12:50:15,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:15,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310465337] [2020-09-14 12:50:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:15,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310465337] [2020-09-14 12:50:15,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340805812] [2020-09-14 12:50:15,818 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 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 [2020-09-14 12:50:15,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:50:15,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:24,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:24,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:24,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449182159] [2020-09-14 12:50:24,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:24,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-09-14 12:50:24,147 INFO L87 Difference]: Start difference. First operand 186 states and 478 transitions. Second operand 19 states. [2020-09-14 12:50:28,664 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-09-14 12:50:33,083 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-09-14 12:50:35,925 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 35 [2020-09-14 12:50:36,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:36,299 INFO L93 Difference]: Finished difference Result 261 states and 622 transitions. [2020-09-14 12:50:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:50:36,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:36,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:36,303 INFO L225 Difference]: With dead ends: 261 [2020-09-14 12:50:36,304 INFO L226 Difference]: Without dead ends: 259 [2020-09-14 12:50:36,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=292, Invalid=636, Unknown=2, NotChecked=0, Total=930 [2020-09-14 12:50:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-09-14 12:50:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 176. [2020-09-14 12:50:36,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-14 12:50:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 450 transitions. [2020-09-14 12:50:36,307 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 450 transitions. Word has length 15 [2020-09-14 12:50:36,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:36,307 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 450 transitions. [2020-09-14 12:50:36,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:36,308 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 450 transitions. [2020-09-14 12:50:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:36,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:36,308 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:36,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-14 12:50:36,509 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -854571154, now seen corresponding path program 259 times [2020-09-14 12:50:36,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:36,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388424763] [2020-09-14 12:50:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:36,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388424763] [2020-09-14 12:50:36,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429774210] [2020-09-14 12:50:36,834 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:36,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:37,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:37,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:37,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699242679] [2020-09-14 12:50:37,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:37,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:37,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:37,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:37,374 INFO L87 Difference]: Start difference. First operand 176 states and 450 transitions. Second operand 19 states. [2020-09-14 12:50:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:38,352 INFO L93 Difference]: Finished difference Result 238 states and 568 transitions. [2020-09-14 12:50:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:50:38,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:38,356 INFO L225 Difference]: With dead ends: 238 [2020-09-14 12:50:38,356 INFO L226 Difference]: Without dead ends: 236 [2020-09-14 12:50:38,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:50:38,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-14 12:50:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 173. [2020-09-14 12:50:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-09-14 12:50:38,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 439 transitions. [2020-09-14 12:50:38,361 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 439 transitions. Word has length 15 [2020-09-14 12:50:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:38,361 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 439 transitions. [2020-09-14 12:50:38,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 439 transitions. [2020-09-14 12:50:38,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:38,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:38,361 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:38,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-09-14 12:50:38,562 INFO L427 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:38,563 INFO L82 PathProgramCache]: Analyzing trace with hash -28847924, now seen corresponding path program 260 times [2020-09-14 12:50:38,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:38,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213508651] [2020-09-14 12:50:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:38,900 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:38,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213508651] [2020-09-14 12:50:38,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301022174] [2020-09-14 12:50:38,901 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:38,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:50:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:38,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:39,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:39,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969720126] [2020-09-14 12:50:39,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:39,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:39,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:39,418 INFO L87 Difference]: Start difference. First operand 173 states and 439 transitions. Second operand 19 states. [2020-09-14 12:50:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:40,358 INFO L93 Difference]: Finished difference Result 240 states and 573 transitions. [2020-09-14 12:50:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:50:40,361 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:40,362 INFO L225 Difference]: With dead ends: 240 [2020-09-14 12:50:40,362 INFO L226 Difference]: Without dead ends: 238 [2020-09-14 12:50:40,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:50:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-14 12:50:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 179. [2020-09-14 12:50:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-09-14 12:50:40,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 456 transitions. [2020-09-14 12:50:40,371 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 456 transitions. Word has length 15 [2020-09-14 12:50:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:40,371 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 456 transitions. [2020-09-14 12:50:40,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:40,372 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 456 transitions. [2020-09-14 12:50:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:40,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:40,372 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:40,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2020-09-14 12:50:40,573 INFO L427 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:40,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:40,574 INFO L82 PathProgramCache]: Analyzing trace with hash -28846963, now seen corresponding path program 261 times [2020-09-14 12:50:40,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:40,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915874458] [2020-09-14 12:50:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:40,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915874458] [2020-09-14 12:50:40,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878510007] [2020-09-14 12:50:40,941 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:41,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:50:41,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:41,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:41,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:41,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:41,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137564707] [2020-09-14 12:50:41,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:41,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:41,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:41,555 INFO L87 Difference]: Start difference. First operand 179 states and 456 transitions. Second operand 19 states. [2020-09-14 12:50:42,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:42,657 INFO L93 Difference]: Finished difference Result 252 states and 598 transitions. [2020-09-14 12:50:42,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:50:42,661 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:42,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:42,662 INFO L225 Difference]: With dead ends: 252 [2020-09-14 12:50:42,662 INFO L226 Difference]: Without dead ends: 250 [2020-09-14 12:50:42,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:50:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-14 12:50:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 178. [2020-09-14 12:50:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-09-14 12:50:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 453 transitions. [2020-09-14 12:50:42,666 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 453 transitions. Word has length 15 [2020-09-14 12:50:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:42,666 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 453 transitions. [2020-09-14 12:50:42,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 453 transitions. [2020-09-14 12:50:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:42,667 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:42,667 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:42,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-09-14 12:50:42,868 INFO L427 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash -28818133, now seen corresponding path program 262 times [2020-09-14 12:50:42,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:42,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854381032] [2020-09-14 12:50:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:43,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854381032] [2020-09-14 12:50:43,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388682024] [2020-09-14 12:50:43,241 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:43,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:50:43,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:46,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:46,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:46,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782009743] [2020-09-14 12:50:46,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:46,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:46,022 INFO L87 Difference]: Start difference. First operand 178 states and 453 transitions. Second operand 19 states. [2020-09-14 12:50:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:47,151 INFO L93 Difference]: Finished difference Result 258 states and 610 transitions. [2020-09-14 12:50:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:50:47,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:47,156 INFO L225 Difference]: With dead ends: 258 [2020-09-14 12:50:47,156 INFO L226 Difference]: Without dead ends: 256 [2020-09-14 12:50:47,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:50:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-14 12:50:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 177. [2020-09-14 12:50:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-14 12:50:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 450 transitions. [2020-09-14 12:50:47,160 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 450 transitions. Word has length 15 [2020-09-14 12:50:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:47,160 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 450 transitions. [2020-09-14 12:50:47,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 450 transitions. [2020-09-14 12:50:47,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:47,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:47,161 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:47,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-09-14 12:50:47,361 INFO L427 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:47,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash -27924403, now seen corresponding path program 263 times [2020-09-14 12:50:47,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:47,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413546548] [2020-09-14 12:50:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:47,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413546548] [2020-09-14 12:50:47,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10203460] [2020-09-14 12:50:47,707 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:47,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:50:47,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:47,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:50:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:56,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:50:56,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:50:56,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432307501] [2020-09-14 12:50:56,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:50:56,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:50:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:50:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:50:56,085 INFO L87 Difference]: Start difference. First operand 177 states and 450 transitions. Second operand 19 states. [2020-09-14 12:50:57,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:50:57,462 INFO L93 Difference]: Finished difference Result 265 states and 623 transitions. [2020-09-14 12:50:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:50:57,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-09-14 12:50:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:50:57,466 INFO L225 Difference]: With dead ends: 265 [2020-09-14 12:50:57,466 INFO L226 Difference]: Without dead ends: 263 [2020-09-14 12:50:57,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:50:57,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-14 12:50:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 182. [2020-09-14 12:50:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-09-14 12:50:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 464 transitions. [2020-09-14 12:50:57,470 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 464 transitions. Word has length 15 [2020-09-14 12:50:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:50:57,471 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 464 transitions. [2020-09-14 12:50:57,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:50:57,471 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 464 transitions. [2020-09-14 12:50:57,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:50:57,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:50:57,471 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:50:57,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:57,672 INFO L427 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:50:57,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:50:57,673 INFO L82 PathProgramCache]: Analyzing trace with hash -27923442, now seen corresponding path program 264 times [2020-09-14 12:50:57,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:50:57,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583906364] [2020-09-14 12:50:57,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:50:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:50:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:50:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583906364] [2020-09-14 12:50:58,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913634109] [2020-09-14 12:50:58,041 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:50:58,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:50:58,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:50:58,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:50:58,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:05,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:05,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-09-14 12:51:05,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480360460] [2020-09-14 12:51:05,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:51:05,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:51:05,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=243, Unknown=2, NotChecked=0, Total=342 [2020-09-14 12:51:05,070 INFO L87 Difference]: Start difference. First operand 182 states and 464 transitions. Second operand 19 states.