/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:01:55,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:01:55,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:01:55,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:01:55,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:01:55,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:01:55,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:01:55,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:01:55,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:01:55,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:01:55,397 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:01:55,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:01:55,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:01:55,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:01:55,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:01:55,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:01:55,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:01:55,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:01:55,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:01:55,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:01:55,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:01:55,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:01:55,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:01:55,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:01:55,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:01:55,417 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:01:55,417 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:01:55,418 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:01:55,419 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:01:55,420 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:01:55,420 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:01:55,421 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:01:55,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:01:55,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:01:55,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:01:55,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:01:55,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:01:55,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:01:55,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:01:55,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:01:55,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:01:55,429 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 [2020-09-11 12:01:55,456 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:01:55,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:01:55,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:01:55,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:01:55,458 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:01:55,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:01:55,459 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:01:55,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:01:55,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:01:55,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:01:55,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:01:55,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:01:55,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:01:55,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:01:55,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:01:55,461 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:01:55,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:01:55,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:01:55,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:01:55,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:01:55,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:01:55,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:01:55,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:01:55,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:01:55,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:01:55,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:01:55,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:01:55,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:01:55,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:01:55,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:01:56,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:01:56,666 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:01:56,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:01:56,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:01:56,674 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:01:56,675 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-2.i [2020-09-11 12:01:56,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba17dce3/3657d9d7d2394346b21520b3a41d8db2/FLAG33353c73e [2020-09-11 12:01:57,481 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:01:57,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/fib_bench-2.i [2020-09-11 12:01:57,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba17dce3/3657d9d7d2394346b21520b3a41d8db2/FLAG33353c73e [2020-09-11 12:01:57,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cba17dce3/3657d9d7d2394346b21520b3a41d8db2 [2020-09-11 12:01:57,725 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:01:57,731 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:01:57,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:57,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:01:57,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:01:57,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,745 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22cf4eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:57, skipping insertion in model container [2020-09-11 12:01:57,745 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:01:57" (1/1) ... [2020-09-11 12:01:57,755 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:01:57,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:01:58,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,352 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:01:58,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:01:58,538 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:01:58,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58 WrapperNode [2020-09-11 12:01:58,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:01:58,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:01:58,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:01:58,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:01:58,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:01:58,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:01:58,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (1/1) ... [2020-09-11 12:01:58,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:01:58,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:01:58,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:01:58,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:01:58,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (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 [2020-09-11 12:01:58,716 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:01:58,716 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:01:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:01:58,717 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:01:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:01:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:01:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:01:58,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:01:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:01:58,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:01:58,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:01:58,720 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 12:01:59,123 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:01:59,123 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:01:59,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59 BoogieIcfgContainer [2020-09-11 12:01:59,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:01:59,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:01:59,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:01:59,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:01:59,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:01:57" (1/3) ... [2020-09-11 12:01:59,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a43f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:01:58" (2/3) ... [2020-09-11 12:01:59,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a43f617 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:01:59, skipping insertion in model container [2020-09-11 12:01:59,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:01:59" (3/3) ... [2020-09-11 12:01:59,138 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-2.i [2020-09-11 12:01:59,150 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:01:59,151 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:01:59,161 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:01:59,162 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:01:59,189 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,190 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,190 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,190 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,191 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,191 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,192 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,192 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,193 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,193 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,193 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,194 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,195 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,195 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,195 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,195 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,196 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,196 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,196 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,196 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,197 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,197 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,198 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,198 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,199 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,204 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,204 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,204 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,205 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,215 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,215 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,216 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,216 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,216 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,216 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:01:59,240 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:01:59,264 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:01:59,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:01:59,265 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:01:59,265 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:01:59,265 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:01:59,265 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:01:59,265 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:01:59,266 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:01:59,281 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,283 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,326 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,326 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,335 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. [2020-09-11 12:01:59,338 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-09-11 12:01:59,358 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-09-11 12:01:59,358 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:01:59,359 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. [2020-09-11 12:01:59,361 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-09-11 12:01:59,363 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:02:00,640 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-09-11 12:02:00,745 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-09-11 12:02:00,745 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-09-11 12:02:00,751 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-09-11 12:02:00,766 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:02:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:02:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:02:00,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:00,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:02:00,780 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-09-11 12:02:00,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:00,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046627334] [2020-09-11 12:02:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:00,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046627334] [2020-09-11 12:02:01,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:02:01,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535110387] [2020-09-11 12:02:01,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:02:01,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:02:01,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:02:01,099 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:02:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,200 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-09-11 12:02:01,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:02:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,227 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:02:01,227 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:02:01,229 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 [2020-09-11 12:02:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:02:01,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-11 12:02:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:02:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-09-11 12:02:01,297 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-09-11 12:02:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,297 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-09-11 12:02:01,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:02:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-09-11 12:02:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:02:01,315 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,315 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-09-11 12:02:01,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942317710] [2020-09-11 12:02:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942317710] [2020-09-11 12:02:01,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290418528] [2020-09-11 12:02:01,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,462 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-09-11 12:02:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,517 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-09-11 12:02:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:01,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,519 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:02:01,520 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:02:01,521 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 [2020-09-11 12:02:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:02:01,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-09-11 12:02:01,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:02:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-09-11 12:02:01,531 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-09-11 12:02:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,533 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-09-11 12:02:01,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-09-11 12:02:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:02:01,535 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,535 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-09-11 12:02:01,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730543066] [2020-09-11 12:02:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730543066] [2020-09-11 12:02:01,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105731951] [2020-09-11 12:02:01,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,638 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-09-11 12:02:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,671 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-09-11 12:02:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:02:01,672 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,674 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:02:01,674 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:02:01,674 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 [2020-09-11 12:02:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:02:01,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-11 12:02:01,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:02:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-09-11 12:02:01,684 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-09-11 12:02:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,684 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-09-11 12:02:01,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-09-11 12:02:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:02:01,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:02:01,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,687 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-09-11 12:02:01,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611540972] [2020-09-11 12:02:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611540972] [2020-09-11 12:02:01,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:01,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:02:01,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30056213] [2020-09-11 12:02:01,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:02:01,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:01,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:02:01,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:02:01,773 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-09-11 12:02:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:01,846 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-09-11 12:02:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:01,846 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:02:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:01,848 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:02:01,848 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:02:01,849 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 [2020-09-11 12:02:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:02:01,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-11 12:02:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:02:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-09-11 12:02:01,858 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-09-11 12:02:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:01,859 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-09-11 12:02:01,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:02:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-09-11 12:02:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:01,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:01,860 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:01,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:02:01,861 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-09-11 12:02:01,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:01,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119934770] [2020-09-11 12:02:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:01,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119934770] [2020-09-11 12:02:01,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26234352] [2020-09-11 12:02:01,997 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 [2020-09-11 12:02:02,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:02,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-09-11 12:02:02,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582556448] [2020-09-11 12:02:02,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:02:02,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:02:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:02,165 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-09-11 12:02:02,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,238 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-09-11 12:02:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:02,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-09-11 12:02:02,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,240 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:02:02,240 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:02:02,241 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 [2020-09-11 12:02:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:02:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-09-11 12:02:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:02:02,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-09-11 12:02:02,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-09-11 12:02:02,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,250 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-09-11 12:02:02,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:02:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-09-11 12:02:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,252 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,468 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-09-11 12:02:02,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359919579] [2020-09-11 12:02:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359919579] [2020-09-11 12:02:02,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998302360] [2020-09-11 12:02:02,574 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 [2020-09-11 12:02:02,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:02,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:02,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:02,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:02,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953679368] [2020-09-11 12:02:02,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:02,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:02,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:02,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:02,710 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-09-11 12:02:02,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:02,774 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:02:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:02,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:02,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:02,775 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:02:02,775 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:02:02,776 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 [2020-09-11 12:02:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:02:02,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-09-11 12:02:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:02:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-09-11 12:02:02,784 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-09-11 12:02:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:02,784 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-09-11 12:02:02,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-09-11 12:02:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:02,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:02,786 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:02,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:02,987 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:02,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-09-11 12:02:02,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:02,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792984063] [2020-09-11 12:02:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792984063] [2020-09-11 12:02:03,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934639008] [2020-09-11 12:02:03,109 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 [2020-09-11 12:02:03,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:03,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684758481] [2020-09-11 12:02:03,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,249 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-09-11 12:02:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:03,312 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-09-11 12:02:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:03,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:03,314 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:02:03,315 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:02:03,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:02:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:02:03,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-09-11 12:02:03,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:02:03,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-09-11 12:02:03,323 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-09-11 12:02:03,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:03,323 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-09-11 12:02:03,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:03,324 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-09-11 12:02:03,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 12:02:03,325 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:03,325 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:03,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:03,540 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-09-11 12:02:03,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:03,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131022569] [2020-09-11 12:02:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131022569] [2020-09-11 12:02:03,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042660709] [2020-09-11 12:02:03,629 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 [2020-09-11 12:02:03,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:02:03,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:03,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:03,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:03,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-11 12:02:03,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431874753] [2020-09-11 12:02:03,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:03,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:03,749 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-09-11 12:02:03,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:03,842 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 12:02:03,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:03,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-09-11 12:02:03,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:03,844 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:02:03,844 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:02:03,845 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 [2020-09-11 12:02:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:02:03,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-09-11 12:02:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:02:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-09-11 12:02:03,851 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-09-11 12:02:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:03,851 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-09-11 12:02:03,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-09-11 12:02:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:03,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:03,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:04,066 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-09-11 12:02:04,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816056422] [2020-09-11 12:02:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816056422] [2020-09-11 12:02:04,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347505884] [2020-09-11 12:02:04,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,156 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-09-11 12:02:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,192 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-09-11 12:02:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 12:02:04,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,194 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:02:04,194 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:02:04,195 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 [2020-09-11 12:02:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:02:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-09-11 12:02:04,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:02:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-09-11 12:02:04,201 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-09-11 12:02:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,201 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-09-11 12:02:04,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-09-11 12:02:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,202 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-11 12:02:04,203 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-09-11 12:02:04,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850883144] [2020-09-11 12:02:04,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850883144] [2020-09-11 12:02:04,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034334288] [2020-09-11 12:02:04,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,294 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-09-11 12:02:04,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,351 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-09-11 12:02:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:04,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,352 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:02:04,353 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:02:04,353 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 [2020-09-11 12:02:04,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:02:04,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-09-11 12:02:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 12:02:04,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-09-11 12:02:04,360 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-09-11 12:02:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,360 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-09-11 12:02:04,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-09-11 12:02:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-11 12:02:04,362 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-09-11 12:02:04,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859901848] [2020-09-11 12:02:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859901848] [2020-09-11 12:02:04,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685945896] [2020-09-11 12:02:04,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,445 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-09-11 12:02:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,540 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,542 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:04,543 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:04,544 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 [2020-09-11 12:02:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-09-11 12:02:04,558 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-09-11 12:02:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,559 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-09-11 12:02:04,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-09-11 12:02:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,560 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-11 12:02:04,561 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-09-11 12:02:04,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746292283] [2020-09-11 12:02:04,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746292283] [2020-09-11 12:02:04,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:02:04,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:02:04,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428934817] [2020-09-11 12:02:04,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:02:04,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:02:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:02:04,655 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-09-11 12:02:04,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:04,742 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-09-11 12:02:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:04,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:02:04,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:04,743 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:02:04,744 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:02:04,744 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 [2020-09-11 12:02:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:02:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-09-11 12:02:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:02:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-09-11 12:02:04,750 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-09-11 12:02:04,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:04,750 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-09-11 12:02:04,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:02:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-09-11 12:02:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:04,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:04,751 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:04,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-11 12:02:04,752 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-09-11 12:02:04,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:04,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920506577] [2020-09-11 12:02:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:04,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920506577] [2020-09-11 12:02:04,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695181393] [2020-09-11 12:02:04,846 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 [2020-09-11 12:02:04,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:04,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:04,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:04,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:04,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-09-11 12:02:05,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550367194] [2020-09-11 12:02:05,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:02:05,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:02:05,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:02:05,022 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-09-11 12:02:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,140 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-09-11 12:02:05,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:05,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-09-11 12:02:05,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,142 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:05,142 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:05,142 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 [2020-09-11 12:02:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:05,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-09-11 12:02:05,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:02:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-09-11 12:02:05,148 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-09-11 12:02:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,149 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-09-11 12:02:05,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:02:05,149 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-09-11 12:02:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,150 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:05,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:02:05,351 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:05,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-09-11 12:02:05,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:05,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461133136] [2020-09-11 12:02:05,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461133136] [2020-09-11 12:02:05,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823930835] [2020-09-11 12:02:05,455 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 [2020-09-11 12:02:05,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:05,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:05,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:05,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:05,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:05,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495528670] [2020-09-11 12:02:05,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:05,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:05,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:05,633 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-09-11 12:02:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:05,688 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 12:02:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:05,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:05,690 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:02:05,690 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:02:05,691 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 [2020-09-11 12:02:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:02:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-09-11 12:02:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-11 12:02:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-09-11 12:02:05,696 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-09-11 12:02:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:05,696 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-09-11 12:02:05,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:05,696 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-09-11 12:02:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:05,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:05,697 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:05,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:05,909 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-09-11 12:02:05,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:05,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474444001] [2020-09-11 12:02:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474444001] [2020-09-11 12:02:06,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137632928] [2020-09-11 12:02:06,032 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 [2020-09-11 12:02:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109565843] [2020-09-11 12:02:06,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,183 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-09-11 12:02:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:06,247 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-09-11 12:02:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:06,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:06,249 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:02:06,250 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:02:06,250 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 [2020-09-11 12:02:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:02:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-09-11 12:02:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-11 12:02:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-09-11 12:02:06,256 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-09-11 12:02:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:06,256 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-09-11 12:02:06,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-09-11 12:02:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:06,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:06,258 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:06,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:02:06,471 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-09-11 12:02:06,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:06,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136051797] [2020-09-11 12:02:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136051797] [2020-09-11 12:02:06,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059249727] [2020-09-11 12:02:06,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:02:06,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:06,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:06,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:06,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:06,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:06,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055965888] [2020-09-11 12:02:06,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:06,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:06,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:06,749 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-09-11 12:02:06,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:06,862 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-09-11 12:02:06,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:06,862 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:06,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:06,863 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:02:06,864 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:02:06,864 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 [2020-09-11 12:02:06,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:02:06,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-09-11 12:02:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:06,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-09-11 12:02:06,868 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-09-11 12:02:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:06,869 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-09-11 12:02:06,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-09-11 12:02:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:02:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:06,870 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:02:07,071 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-09-11 12:02:07,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478904691] [2020-09-11 12:02:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478904691] [2020-09-11 12:02:07,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387313666] [2020-09-11 12:02:07,143 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 [2020-09-11 12:02:07,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:07,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:07,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:07,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:07,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769441640] [2020-09-11 12:02:07,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:07,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:07,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:07,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,272 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-09-11 12:02:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,389 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-09-11 12:02:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:07,390 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-09-11 12:02:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,391 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:02:07,392 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:02:07,392 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 [2020-09-11 12:02:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:02:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-09-11 12:02:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-11 12:02:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-09-11 12:02:07,397 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-09-11 12:02:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,397 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-09-11 12:02:07,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-09-11 12:02:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,398 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:07,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:02:07,612 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-09-11 12:02:07,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:07,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27259583] [2020-09-11 12:02:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27259583] [2020-09-11 12:02:07,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836713791] [2020-09-11 12:02:07,703 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 [2020-09-11 12:02:07,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:07,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:07,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:07,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:07,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136055063] [2020-09-11 12:02:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:07,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:07,887 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-09-11 12:02:07,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:07,944 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-09-11 12:02:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:02:07,945 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:07,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:07,946 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:02:07,947 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:02:07,947 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 [2020-09-11 12:02:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:02:07,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-09-11 12:02:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-11 12:02:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-09-11 12:02:07,953 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-09-11 12:02:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:07,954 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-09-11 12:02:07,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-09-11 12:02:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:07,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:07,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:02:08,170 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-09-11 12:02:08,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221355783] [2020-09-11 12:02:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221355783] [2020-09-11 12:02:08,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32275153] [2020-09-11 12:02:08,274 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 [2020-09-11 12:02:08,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:08,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:08,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:08,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:08,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160987963] [2020-09-11 12:02:08,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:08,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:08,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:08,410 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-09-11 12:02:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:08,504 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-09-11 12:02:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:08,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:08,505 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:02:08,506 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:02:08,506 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 [2020-09-11 12:02:08,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:02:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-09-11 12:02:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-11 12:02:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-09-11 12:02:08,511 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-09-11 12:02:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:08,511 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-09-11 12:02:08,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:08,511 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-09-11 12:02:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:08,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:08,512 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:08,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:08,722 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:08,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-09-11 12:02:08,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:08,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618995269] [2020-09-11 12:02:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:08,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618995269] [2020-09-11 12:02:08,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535893059] [2020-09-11 12:02:08,862 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 [2020-09-11 12:02:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:08,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:09,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:09,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905913844] [2020-09-11 12:02:09,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:09,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:09,015 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-09-11 12:02:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,088 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-09-11 12:02:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,088 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,089 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:02:09,089 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:02:09,090 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 [2020-09-11 12:02:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:02:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-11 12:02:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-09-11 12:02:09,093 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-09-11 12:02:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,094 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-09-11 12:02:09,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,094 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-09-11 12:02:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:09,305 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-09-11 12:02:09,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091565042] [2020-09-11 12:02:09,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091565042] [2020-09-11 12:02:09,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750571309] [2020-09-11 12:02:09,410 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 [2020-09-11 12:02:09,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:09,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:09,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:09,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731127133] [2020-09-11 12:02:09,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:09,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:09,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:09,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:09,579 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-09-11 12:02:09,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:09,636 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-09-11 12:02:09,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:09,636 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:09,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:09,638 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:02:09,638 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 12:02:09,638 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 [2020-09-11 12:02:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 12:02:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-09-11 12:02:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-11 12:02:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-09-11 12:02:09,642 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-09-11 12:02:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:09,643 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-09-11 12:02:09,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-09-11 12:02:09,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:09,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:09,644 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:09,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-09-11 12:02:09,854 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:09,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-09-11 12:02:09,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:09,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92231430] [2020-09-11 12:02:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:09,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92231430] [2020-09-11 12:02:09,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167422256] [2020-09-11 12:02:09,938 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 [2020-09-11 12:02:10,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:10,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:10,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937482999] [2020-09-11 12:02:10,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,110 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:10,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,214 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-09-11 12:02:10,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:10,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,216 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,216 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:10,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-09-11 12:02:10,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:10,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-09-11 12:02:10,220 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-09-11 12:02:10,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,221 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-09-11 12:02:10,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-09-11 12:02:10,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,221 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:10,432 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-09-11 12:02:10,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476890930] [2020-09-11 12:02:10,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476890930] [2020-09-11 12:02:10,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627332300] [2020-09-11 12:02:10,516 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 [2020-09-11 12:02:10,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:10,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:10,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:10,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:10,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876530096] [2020-09-11 12:02:10,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:10,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:10,678 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-09-11 12:02:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:10,770 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 12:02:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:10,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:10,771 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:02:10,771 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:02:10,772 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 [2020-09-11 12:02:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:02:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-09-11 12:02:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-11 12:02:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-09-11 12:02:10,776 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-09-11 12:02:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:10,776 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-09-11 12:02:10,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-09-11 12:02:10,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:10,777 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:10,777 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:10,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:02:10,978 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-09-11 12:02:10,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:10,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476023770] [2020-09-11 12:02:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476023770] [2020-09-11 12:02:11,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803518376] [2020-09-11 12:02:11,051 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 [2020-09-11 12:02:11,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,183 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219094978] [2020-09-11 12:02:11,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,243 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-09-11 12:02:11,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:11,469 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-09-11 12:02:11,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:11,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:11,473 INFO L225 Difference]: With dead ends: 133 [2020-09-11 12:02:11,474 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:11,474 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 [2020-09-11 12:02:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-09-11 12:02:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-11 12:02:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-09-11 12:02:11,480 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-09-11 12:02:11,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:11,480 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-09-11 12:02:11,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-09-11 12:02:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:11,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:11,482 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:11,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:11,683 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:11,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:11,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-09-11 12:02:11,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:11,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806383834] [2020-09-11 12:02:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806383834] [2020-09-11 12:02:11,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303823358] [2020-09-11 12:02:11,755 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 [2020-09-11 12:02:11,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:11,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:11,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:11,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:11,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356516964] [2020-09-11 12:02:11,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:11,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:11,889 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:12,018 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-09-11 12:02:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:12,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:12,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:12,020 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:02:12,020 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 12:02:12,021 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 [2020-09-11 12:02:12,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 12:02:12,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-09-11 12:02:12,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:12,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:12,025 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:12,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:12,025 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:12,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:12,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:12,026 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:02:12,236 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-09-11 12:02:12,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412805703] [2020-09-11 12:02:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412805703] [2020-09-11 12:02:12,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15835651] [2020-09-11 12:02:12,308 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 [2020-09-11 12:02:12,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:12,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:12,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:12,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414957936] [2020-09-11 12:02:12,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:12,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:12,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:12,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:12,426 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:12,662 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-09-11 12:02:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:12,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:12,664 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:12,664 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:12,664 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 [2020-09-11 12:02:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-09-11 12:02:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 12:02:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-09-11 12:02:12,668 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-09-11 12:02:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:12,668 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-09-11 12:02:12,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-09-11 12:02:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:12,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:12,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:12,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:02:12,879 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:12,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:12,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-09-11 12:02:12,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:12,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560732392] [2020-09-11 12:02:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:12,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560732392] [2020-09-11 12:02:12,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085255605] [2020-09-11 12:02:12,948 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 [2020-09-11 12:02:13,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:13,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:13,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985441116] [2020-09-11 12:02:13,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,112 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-09-11 12:02:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,281 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-09-11 12:02:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:13,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,282 INFO L225 Difference]: With dead ends: 136 [2020-09-11 12:02:13,283 INFO L226 Difference]: Without dead ends: 131 [2020-09-11 12:02:13,283 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 [2020-09-11 12:02:13,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-11 12:02:13,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-09-11 12:02:13,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:13,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-09-11 12:02:13,287 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-09-11 12:02:13,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,288 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-09-11 12:02:13,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-09-11 12:02:13,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,289 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,289 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:13,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-11 12:02:13,501 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:13,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:13,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-09-11 12:02:13,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:13,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37522177] [2020-09-11 12:02:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37522177] [2020-09-11 12:02:13,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809634031] [2020-09-11 12:02:13,578 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 [2020-09-11 12:02:13,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:13,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:13,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:13,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:13,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089417430] [2020-09-11 12:02:13,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:13,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:13,721 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-09-11 12:02:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:13,874 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-09-11 12:02:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:13,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:13,877 INFO L225 Difference]: With dead ends: 130 [2020-09-11 12:02:13,877 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:02:13,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:02:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-09-11 12:02:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:13,882 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:13,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:13,882 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:13,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:13,882 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:13,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:13,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:13,883 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:02:14,093 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-09-11 12:02:14,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011199513] [2020-09-11 12:02:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011199513] [2020-09-11 12:02:14,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540104480] [2020-09-11 12:02:14,187 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 [2020-09-11 12:02:14,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807455912] [2020-09-11 12:02:14,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,336 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:14,469 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-09-11 12:02:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:14,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:14,470 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:14,470 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:14,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:14,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-09-11 12:02:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:14,476 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:14,478 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:14,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:14,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:14,479 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:14,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:02:14,688 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-09-11 12:02:14,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:14,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135142942] [2020-09-11 12:02:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135142942] [2020-09-11 12:02:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181468548] [2020-09-11 12:02:14,768 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 [2020-09-11 12:02:14,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:14,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:14,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:14,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:14,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:14,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:14,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:14,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552577089] [2020-09-11 12:02:14,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:14,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:14,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:14,911 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,085 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-09-11 12:02:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:15,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,087 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:02:15,087 INFO L226 Difference]: Without dead ends: 126 [2020-09-11 12:02:15,088 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 [2020-09-11 12:02:15,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-11 12:02:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-09-11 12:02:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-11 12:02:15,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-09-11 12:02:15,093 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-09-11 12:02:15,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,094 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-09-11 12:02:15,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,094 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-09-11 12:02:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,095 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:15,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:15,306 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:15,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-09-11 12:02:15,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:15,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91724651] [2020-09-11 12:02:15,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91724651] [2020-09-11 12:02:15,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259411456] [2020-09-11 12:02:15,381 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 [2020-09-11 12:02:15,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:15,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:15,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:15,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:15,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:15,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543739992] [2020-09-11 12:02:15,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:15,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:15,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:15,526 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-09-11 12:02:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:15,824 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-09-11 12:02:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:15,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:15,825 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:15,826 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:15,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-09-11 12:02:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-11 12:02:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-09-11 12:02:15,830 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-09-11 12:02:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:15,830 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-09-11 12:02:15,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-09-11 12:02:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:15,831 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:15,831 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:16,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-09-11 12:02:16,032 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:16,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-09-11 12:02:16,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:16,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929287633] [2020-09-11 12:02:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929287633] [2020-09-11 12:02:16,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932597258] [2020-09-11 12:02:16,105 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 [2020-09-11 12:02:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-09-11 12:02:16,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880106933] [2020-09-11 12:02:16,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:02:16,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:02:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:02:16,231 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-09-11 12:02:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:16,431 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-09-11 12:02:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:16,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-09-11 12:02:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:16,433 INFO L225 Difference]: With dead ends: 135 [2020-09-11 12:02:16,433 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 12:02:16,434 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 [2020-09-11 12:02:16,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 12:02:16,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-09-11 12:02:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-11 12:02:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-09-11 12:02:16,438 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-09-11 12:02:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:16,439 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-09-11 12:02:16,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:02:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-09-11 12:02:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:16,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:16,440 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:16,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:16,650 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:16,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-09-11 12:02:16,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:16,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844390719] [2020-09-11 12:02:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844390719] [2020-09-11 12:02:16,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470984204] [2020-09-11 12:02:16,741 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 [2020-09-11 12:02:16,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:16,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:16,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:16,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:16,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:16,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:16,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:16,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-09-11 12:02:16,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250650571] [2020-09-11 12:02:16,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:02:16,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:16,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:02:16,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:16,911 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-09-11 12:02:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:17,044 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-09-11 12:02:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:17,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-09-11 12:02:17,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:17,047 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:17,047 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:17,048 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 [2020-09-11 12:02:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-09-11 12:02:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-11 12:02:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-09-11 12:02:17,055 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-09-11 12:02:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:17,055 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-09-11 12:02:17,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:02:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-09-11 12:02:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:17,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:17,056 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-09-11 12:02:17,257 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-09-11 12:02:17,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277686847] [2020-09-11 12:02:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277686847] [2020-09-11 12:02:17,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568197395] [2020-09-11 12:02:17,383 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 [2020-09-11 12:02:17,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:17,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:17,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:17,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328714852] [2020-09-11 12:02:17,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:17,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:17,528 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-09-11 12:02:17,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:17,577 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-09-11 12:02:17,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:17,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:17,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:17,579 INFO L225 Difference]: With dead ends: 132 [2020-09-11 12:02:17,579 INFO L226 Difference]: Without dead ends: 129 [2020-09-11 12:02:17,580 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 [2020-09-11 12:02:17,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-11 12:02:17,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-09-11 12:02:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:17,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:17,585 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:17,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:17,586 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:17,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:17,586 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:17,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:17,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:17,587 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:17,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:02:17,799 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:17,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-09-11 12:02:17,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:17,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428786105] [2020-09-11 12:02:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:17,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428786105] [2020-09-11 12:02:17,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862441630] [2020-09-11 12:02:17,933 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 [2020-09-11 12:02:17,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:17,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:17,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:18,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:18,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051074780] [2020-09-11 12:02:18,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:18,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:18,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:18,159 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,230 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-09-11 12:02:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:18,230 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,231 INFO L225 Difference]: With dead ends: 143 [2020-09-11 12:02:18,232 INFO L226 Difference]: Without dead ends: 140 [2020-09-11 12:02:18,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:02:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-11 12:02:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-09-11 12:02:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-11 12:02:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-09-11 12:02:18,237 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-09-11 12:02:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,237 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-09-11 12:02:18,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-09-11 12:02:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,240 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-09-11 12:02:18,441 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-09-11 12:02:18,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936776953] [2020-09-11 12:02:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936776953] [2020-09-11 12:02:18,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341334507] [2020-09-11 12:02:18,540 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 [2020-09-11 12:02:18,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:18,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:18,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:18,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:18,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:18,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:18,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:18,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090383499] [2020-09-11 12:02:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:18,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:18,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:18,681 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-09-11 12:02:18,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:18,764 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-09-11 12:02:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:18,765 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:18,766 INFO L225 Difference]: With dead ends: 142 [2020-09-11 12:02:18,766 INFO L226 Difference]: Without dead ends: 139 [2020-09-11 12:02:18,766 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 [2020-09-11 12:02:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-11 12:02:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-09-11 12:02:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-11 12:02:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-09-11 12:02:18,770 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-09-11 12:02:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:18,770 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-09-11 12:02:18,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-09-11 12:02:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:18,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:18,771 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:18,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:02:18,983 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:18,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-09-11 12:02:18,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:18,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646625356] [2020-09-11 12:02:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646625356] [2020-09-11 12:02:19,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700936187] [2020-09-11 12:02:19,099 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 [2020-09-11 12:02:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521401600] [2020-09-11 12:02:19,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,260 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-09-11 12:02:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:19,380 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-09-11 12:02:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:19,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:19,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:19,382 INFO L225 Difference]: With dead ends: 141 [2020-09-11 12:02:19,382 INFO L226 Difference]: Without dead ends: 138 [2020-09-11 12:02:19,382 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 [2020-09-11 12:02:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-11 12:02:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-09-11 12:02:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:19,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-09-11 12:02:19,387 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-09-11 12:02:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:19,387 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-09-11 12:02:19,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-09-11 12:02:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:02:19,388 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:19,388 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:19,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:02:19,593 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-09-11 12:02:19,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:19,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144899894] [2020-09-11 12:02:19,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144899894] [2020-09-11 12:02:19,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123407881] [2020-09-11 12:02:19,670 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 [2020-09-11 12:02:19,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:19,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:19,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:19,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:19,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:19,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:19,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566512392] [2020-09-11 12:02:19,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:19,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:19,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:19,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:19,823 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:20,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:20,016 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:20,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-09-11 12:02:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:20,018 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:20,018 INFO L226 Difference]: Without dead ends: 144 [2020-09-11 12:02:20,018 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 [2020-09-11 12:02:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-11 12:02:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-09-11 12:02:20,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-11 12:02:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-09-11 12:02:20,022 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-09-11 12:02:20,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:20,022 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-09-11 12:02:20,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-09-11 12:02:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:20,023 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:20,023 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:20,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:20,224 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-09-11 12:02:20,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:20,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094965370] [2020-09-11 12:02:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094965370] [2020-09-11 12:02:20,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191201421] [2020-09-11 12:02:20,318 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 [2020-09-11 12:02:20,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:20,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:20,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864862130] [2020-09-11 12:02:20,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:20,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:20,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:20,481 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-09-11 12:02:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:20,550 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-09-11 12:02:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:02:20,551 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:20,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:20,552 INFO L225 Difference]: With dead ends: 138 [2020-09-11 12:02:20,553 INFO L226 Difference]: Without dead ends: 136 [2020-09-11 12:02:20,553 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 [2020-09-11 12:02:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-11 12:02:20,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-09-11 12:02:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-11 12:02:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-09-11 12:02:20,559 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-09-11 12:02:20,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:20,559 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-09-11 12:02:20,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-09-11 12:02:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:20,560 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:20,560 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:20,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:02:20,771 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:20,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:20,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-09-11 12:02:20,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:20,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647069876] [2020-09-11 12:02:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:20,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647069876] [2020-09-11 12:02:20,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661348014] [2020-09-11 12:02:20,880 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 [2020-09-11 12:02:20,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:20,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:20,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:20,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:21,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:21,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570241778] [2020-09-11 12:02:21,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:21,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:21,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:21,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:21,071 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:21,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:21,211 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-09-11 12:02:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:21,211 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:21,212 INFO L225 Difference]: With dead ends: 145 [2020-09-11 12:02:21,212 INFO L226 Difference]: Without dead ends: 143 [2020-09-11 12:02:21,213 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 [2020-09-11 12:02:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-11 12:02:21,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-09-11 12:02:21,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-11 12:02:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-09-11 12:02:21,216 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-09-11 12:02:21,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:21,217 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-09-11 12:02:21,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:21,217 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-09-11 12:02:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:21,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:21,217 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:21,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:02:21,427 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-09-11 12:02:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:21,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368650834] [2020-09-11 12:02:21,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368650834] [2020-09-11 12:02:21,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021845483] [2020-09-11 12:02:21,512 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 [2020-09-11 12:02:21,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:21,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:21,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:21,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:21,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:21,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:21,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645534095] [2020-09-11 12:02:21,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:21,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:21,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:21,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:21,687 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-09-11 12:02:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:21,838 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-09-11 12:02:21,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:21,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:21,840 INFO L225 Difference]: With dead ends: 150 [2020-09-11 12:02:21,840 INFO L226 Difference]: Without dead ends: 148 [2020-09-11 12:02:21,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-11 12:02:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-09-11 12:02:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-09-11 12:02:21,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-09-11 12:02:21,849 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-09-11 12:02:21,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:21,849 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-09-11 12:02:21,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:21,849 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-09-11 12:02:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:21,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:21,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:22,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:22,051 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:22,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-09-11 12:02:22,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:22,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271439455] [2020-09-11 12:02:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271439455] [2020-09-11 12:02:22,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752045037] [2020-09-11 12:02:22,157 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 [2020-09-11 12:02:22,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:22,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:22,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:22,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85707387] [2020-09-11 12:02:22,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,336 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:22,451 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-09-11 12:02:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:22,452 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:22,453 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:22,453 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:22,453 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 [2020-09-11 12:02:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:22,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-09-11 12:02:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:22,457 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:22,457 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:22,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:22,459 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:02:22,669 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-09-11 12:02:22,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:22,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171258352] [2020-09-11 12:02:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171258352] [2020-09-11 12:02:22,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542676653] [2020-09-11 12:02:22,769 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 [2020-09-11 12:02:22,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:22,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:22,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:22,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:22,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135037340] [2020-09-11 12:02:22,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:22,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:22,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:22,910 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:23,064 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-09-11 12:02:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:23,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:23,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:23,066 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:23,067 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:23,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:02:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-09-11 12:02:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-09-11 12:02:23,071 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-09-11 12:02:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:23,071 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-09-11 12:02:23,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-09-11 12:02:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:23,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:23,072 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:23,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:23,283 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-09-11 12:02:23,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:23,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603575378] [2020-09-11 12:02:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603575378] [2020-09-11 12:02:23,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938430630] [2020-09-11 12:02:23,401 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 [2020-09-11 12:02:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:23,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:23,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:23,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783645391] [2020-09-11 12:02:23,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:23,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:23,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:23,574 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-09-11 12:02:23,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:23,654 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-09-11 12:02:23,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:23,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:23,656 INFO L225 Difference]: With dead ends: 152 [2020-09-11 12:02:23,656 INFO L226 Difference]: Without dead ends: 150 [2020-09-11 12:02:23,656 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 [2020-09-11 12:02:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-11 12:02:23,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-09-11 12:02:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:23,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-09-11 12:02:23,665 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-09-11 12:02:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:23,665 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-09-11 12:02:23,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-09-11 12:02:23,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:23,666 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:23,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:23,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:02:23,876 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:23,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:23,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-09-11 12:02:23,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:23,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318129769] [2020-09-11 12:02:23,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:23,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318129769] [2020-09-11 12:02:23,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833794299] [2020-09-11 12:02:23,977 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 [2020-09-11 12:02:24,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:24,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:24,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:24,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:24,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:24,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585202218] [2020-09-11 12:02:24,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:24,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:24,154 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-09-11 12:02:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,314 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-09-11 12:02:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,315 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,316 INFO L225 Difference]: With dead ends: 153 [2020-09-11 12:02:24,316 INFO L226 Difference]: Without dead ends: 151 [2020-09-11 12:02:24,317 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 [2020-09-11 12:02:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-11 12:02:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-09-11 12:02:24,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-09-11 12:02:24,321 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-09-11 12:02:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,321 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-09-11 12:02:24,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-09-11 12:02:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:24,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-09-11 12:02:24,532 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-09-11 12:02:24,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:24,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841247590] [2020-09-11 12:02:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841247590] [2020-09-11 12:02:24,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066331820] [2020-09-11 12:02:24,619 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 [2020-09-11 12:02:24,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:24,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:24,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:24,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:24,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:24,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140673021] [2020-09-11 12:02:24,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:24,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:24,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:24,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:24,787 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-09-11 12:02:24,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:24,972 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:24,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:24,974 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:24,974 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:24,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:02:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-09-11 12:02:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-09-11 12:02:24,979 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-09-11 12:02:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:24,979 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-09-11 12:02:24,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-09-11 12:02:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:24,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:24,980 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:25,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:02:25,191 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-09-11 12:02:25,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:25,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018496280] [2020-09-11 12:02:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018496280] [2020-09-11 12:02:25,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88749726] [2020-09-11 12:02:25,290 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 [2020-09-11 12:02:25,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:25,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:25,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:25,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472324758] [2020-09-11 12:02:25,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:25,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:25,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:25,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:25,487 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:25,593 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-11 12:02:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:25,594 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:25,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:25,596 INFO L225 Difference]: With dead ends: 148 [2020-09-11 12:02:25,596 INFO L226 Difference]: Without dead ends: 146 [2020-09-11 12:02:25,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:25,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-11 12:02:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-09-11 12:02:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:25,601 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:25,602 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:25,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:25,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:25,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:25,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:25,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-09-11 12:02:25,815 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:25,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:25,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-09-11 12:02:25,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:25,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053504078] [2020-09-11 12:02:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:25,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053504078] [2020-09-11 12:02:25,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623393291] [2020-09-11 12:02:25,911 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 [2020-09-11 12:02:25,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:25,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:26,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:26,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638775667] [2020-09-11 12:02:26,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:26,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:26,065 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:26,246 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-09-11 12:02:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:26,247 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:26,247 INFO L225 Difference]: With dead ends: 157 [2020-09-11 12:02:26,248 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:26,248 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 [2020-09-11 12:02:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-09-11 12:02:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-09-11 12:02:26,252 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-09-11 12:02:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:26,252 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-09-11 12:02:26,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-09-11 12:02:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:26,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:26,253 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:26,462 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-09-11 12:02:26,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768027446] [2020-09-11 12:02:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:26,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768027446] [2020-09-11 12:02:26,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566521356] [2020-09-11 12:02:26,558 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 [2020-09-11 12:02:26,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:26,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:26,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:02:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:26,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:26,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:02:26,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001087087] [2020-09-11 12:02:26,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:02:26,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:02:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:02:26,642 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-09-11 12:02:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:26,762 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-09-11 12:02:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:26,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:02:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:26,764 INFO L225 Difference]: With dead ends: 149 [2020-09-11 12:02:26,764 INFO L226 Difference]: Without dead ends: 147 [2020-09-11 12:02:26,765 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 [2020-09-11 12:02:26,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-11 12:02:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-09-11 12:02:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:26,769 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:26,770 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:26,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:02:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:26,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:26,770 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:26,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:02:26,973 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-09-11 12:02:26,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:26,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105671385] [2020-09-11 12:02:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105671385] [2020-09-11 12:02:27,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875335137] [2020-09-11 12:02:27,047 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 [2020-09-11 12:02:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:27,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:27,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:27,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755156590] [2020-09-11 12:02:27,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:27,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:27,207 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:27,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:27,487 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-09-11 12:02:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:27,488 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:27,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:27,489 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:27,489 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:27,489 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 [2020-09-11 12:02:27,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:27,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-09-11 12:02:27,492 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-09-11 12:02:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:27,492 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-09-11 12:02:27,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-09-11 12:02:27,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:27,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:27,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:27,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:02:27,696 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-09-11 12:02:27,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:27,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95597886] [2020-09-11 12:02:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:27,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95597886] [2020-09-11 12:02:27,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220486716] [2020-09-11 12:02:27,777 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 [2020-09-11 12:02:27,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:27,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:28,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:28,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746648943] [2020-09-11 12:02:28,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:28,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:28,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:28,005 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:28,250 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:28,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:28,252 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:28,252 INFO L226 Difference]: Without dead ends: 154 [2020-09-11 12:02:28,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-11 12:02:28,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-09-11 12:02:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:28,259 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:28,260 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:28,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:28,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:28,262 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:28,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:28,475 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:28,476 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-09-11 12:02:28,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:28,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564584394] [2020-09-11 12:02:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564584394] [2020-09-11 12:02:28,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440244620] [2020-09-11 12:02:28,575 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 [2020-09-11 12:02:28,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:28,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:28,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:28,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:28,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398428221] [2020-09-11 12:02:28,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:28,799 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:29,185 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-09-11 12:02:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:29,186 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:29,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:29,187 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:29,188 INFO L226 Difference]: Without dead ends: 171 [2020-09-11 12:02:29,188 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 [2020-09-11 12:02:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-09-11 12:02:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-09-11 12:02:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-11 12:02:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-09-11 12:02:29,192 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-09-11 12:02:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:29,192 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-09-11 12:02:29,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-09-11 12:02:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:29,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:29,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:29,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-09-11 12:02:29,405 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:29,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-09-11 12:02:29,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:29,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793496088] [2020-09-11 12:02:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793496088] [2020-09-11 12:02:29,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224762907] [2020-09-11 12:02:29,484 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 [2020-09-11 12:02:29,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:29,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:29,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:29,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:29,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:29,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759404236] [2020-09-11 12:02:29,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:29,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:29,710 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-09-11 12:02:29,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:29,992 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-09-11 12:02:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:29,993 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:29,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:29,994 INFO L225 Difference]: With dead ends: 166 [2020-09-11 12:02:29,994 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:29,995 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 [2020-09-11 12:02:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-09-11 12:02:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-09-11 12:02:29,999 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-09-11 12:02:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:30,000 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-09-11 12:02:30,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-09-11 12:02:30,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:30,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:30,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:30,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:30,202 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:30,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:30,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-09-11 12:02:30,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:30,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15116327] [2020-09-11 12:02:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15116327] [2020-09-11 12:02:30,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117114274] [2020-09-11 12:02:30,284 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 [2020-09-11 12:02:30,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:30,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:30,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:30,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:30,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104393454] [2020-09-11 12:02:30,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:30,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:30,431 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-09-11 12:02:30,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:30,654 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-09-11 12:02:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:30,655 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:30,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:30,656 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:30,656 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:30,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-09-11 12:02:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-11 12:02:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-09-11 12:02:30,660 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-09-11 12:02:30,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:30,661 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-09-11 12:02:30,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:30,661 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-09-11 12:02:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:30,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:30,662 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:30,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:02:30,871 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-09-11 12:02:30,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:30,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999706962] [2020-09-11 12:02:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:30,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999706962] [2020-09-11 12:02:30,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908680664] [2020-09-11 12:02:30,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:02:31,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:31,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:31,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:31,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:31,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716223579] [2020-09-11 12:02:31,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:31,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:31,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:31,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:31,143 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:31,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:31,441 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-09-11 12:02:31,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:31,441 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:31,443 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:31,443 INFO L226 Difference]: Without dead ends: 168 [2020-09-11 12:02:31,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:02:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-11 12:02:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-09-11 12:02:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-09-11 12:02:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-09-11 12:02:31,446 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-09-11 12:02:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:31,447 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-09-11 12:02:31,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-09-11 12:02:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:31,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:31,447 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:31,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:31,649 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:31,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-09-11 12:02:31,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:31,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31055220] [2020-09-11 12:02:31,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31055220] [2020-09-11 12:02:31,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256284493] [2020-09-11 12:02:31,726 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 [2020-09-11 12:02:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:31,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:31,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:31,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:31,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:31,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467184278] [2020-09-11 12:02:31,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:31,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:31,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:31,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:31,897 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-09-11 12:02:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:32,306 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-09-11 12:02:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:32,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:32,308 INFO L225 Difference]: With dead ends: 177 [2020-09-11 12:02:32,308 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:02:32,308 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 [2020-09-11 12:02:32,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:02:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-09-11 12:02:32,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-11 12:02:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-09-11 12:02:32,312 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-09-11 12:02:32,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:32,313 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-09-11 12:02:32,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-09-11 12:02:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:32,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:32,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:32,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:02:32,524 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:32,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:32,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-09-11 12:02:32,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:32,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720089621] [2020-09-11 12:02:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720089621] [2020-09-11 12:02:32,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460556179] [2020-09-11 12:02:32,615 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 [2020-09-11 12:02:32,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:32,753 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:32,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:32,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:32,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931608212] [2020-09-11 12:02:32,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:32,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:32,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:32,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:32,766 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-09-11 12:02:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:33,232 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-09-11 12:02:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:33,233 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:33,235 INFO L225 Difference]: With dead ends: 190 [2020-09-11 12:02:33,235 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:33,235 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 [2020-09-11 12:02:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-09-11 12:02:33,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:33,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-09-11 12:02:33,239 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-09-11 12:02:33,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:33,239 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-09-11 12:02:33,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:33,240 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-09-11 12:02:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:33,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:33,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:33,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:02:33,441 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:33,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-09-11 12:02:33,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:33,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381830485] [2020-09-11 12:02:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:33,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381830485] [2020-09-11 12:02:33,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233705890] [2020-09-11 12:02:33,531 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 [2020-09-11 12:02:33,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:33,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:33,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:33,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:33,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:33,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046608189] [2020-09-11 12:02:33,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:33,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:33,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:33,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:33,685 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-09-11 12:02:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:34,115 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-09-11 12:02:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:34,116 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:34,118 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:34,118 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:34,118 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 [2020-09-11 12:02:34,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:34,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-09-11 12:02:34,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-09-11 12:02:34,121 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-09-11 12:02:34,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:34,122 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-09-11 12:02:34,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-09-11 12:02:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:34,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:34,123 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:34,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:02:34,332 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-09-11 12:02:34,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:34,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609406905] [2020-09-11 12:02:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609406905] [2020-09-11 12:02:34,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977726619] [2020-09-11 12:02:34,416 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 [2020-09-11 12:02:34,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:34,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:34,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:34,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:34,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250014539] [2020-09-11 12:02:34,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:34,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:34,588 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-09-11 12:02:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:34,761 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-09-11 12:02:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:34,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:34,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:34,764 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:34,764 INFO L226 Difference]: Without dead ends: 162 [2020-09-11 12:02:34,764 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 [2020-09-11 12:02:34,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-11 12:02:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-09-11 12:02:34,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-09-11 12:02:34,768 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-09-11 12:02:34,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:34,769 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-09-11 12:02:34,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:34,769 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-09-11 12:02:34,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:34,769 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:34,770 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:34,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:02:34,977 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:34,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-09-11 12:02:34,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:34,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456663510] [2020-09-11 12:02:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:34,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456663510] [2020-09-11 12:02:35,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561329996] [2020-09-11 12:02:35,072 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 [2020-09-11 12:02:35,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:35,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:35,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:35,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:35,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:35,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169022695] [2020-09-11 12:02:35,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:35,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:35,241 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-09-11 12:02:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:35,429 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-09-11 12:02:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:35,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:35,431 INFO L225 Difference]: With dead ends: 161 [2020-09-11 12:02:35,432 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:35,432 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 [2020-09-11 12:02:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-09-11 12:02:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-09-11 12:02:35,435 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-09-11 12:02:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:35,435 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-09-11 12:02:35,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-09-11 12:02:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:35,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:35,436 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:35,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:02:35,637 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:35,638 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-09-11 12:02:35,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:35,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332455122] [2020-09-11 12:02:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332455122] [2020-09-11 12:02:35,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93331011] [2020-09-11 12:02:35,712 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 [2020-09-11 12:02:35,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:35,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:35,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:35,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:35,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:35,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96873634] [2020-09-11 12:02:35,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:35,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:35,867 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:36,124 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-09-11 12:02:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:36,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:36,127 INFO L225 Difference]: With dead ends: 165 [2020-09-11 12:02:36,127 INFO L226 Difference]: Without dead ends: 163 [2020-09-11 12:02:36,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-11 12:02:36,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-09-11 12:02:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-09-11 12:02:36,133 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-09-11 12:02:36,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:36,133 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-09-11 12:02:36,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:36,133 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-09-11 12:02:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:36,134 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:36,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-09-11 12:02:36,335 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:36,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-09-11 12:02:36,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:36,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675124249] [2020-09-11 12:02:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:36,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675124249] [2020-09-11 12:02:36,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939644232] [2020-09-11 12:02:36,410 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 [2020-09-11 12:02:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:36,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:36,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:36,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:36,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:36,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259279372] [2020-09-11 12:02:36,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:36,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:36,598 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-09-11 12:02:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:36,852 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-09-11 12:02:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:36,852 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:36,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:36,854 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:36,854 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:36,854 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 [2020-09-11 12:02:36,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-09-11 12:02:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:36,858 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:36,858 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:36,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:36,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:36,859 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:37,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,068 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:37,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:37,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-09-11 12:02:37,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:37,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785706817] [2020-09-11 12:02:37,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785706817] [2020-09-11 12:02:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295525000] [2020-09-11 12:02:37,152 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 [2020-09-11 12:02:37,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:37,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:37,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756719209] [2020-09-11 12:02:37,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:37,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:37,301 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:37,621 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-09-11 12:02:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:37,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:37,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:37,624 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:37,624 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:37,624 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 [2020-09-11 12:02:37,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-09-11 12:02:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:37,627 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:37,628 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:37,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:37,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:37,628 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:37,628 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:37,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:37,829 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-09-11 12:02:37,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:37,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607471076] [2020-09-11 12:02:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:37,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607471076] [2020-09-11 12:02:37,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293779954] [2020-09-11 12:02:37,904 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 [2020-09-11 12:02:37,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:37,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:37,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:38,035 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:38,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:38,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995530260] [2020-09-11 12:02:38,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:38,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:38,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:38,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:38,049 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:38,273 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-09-11 12:02:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:38,274 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:38,275 INFO L225 Difference]: With dead ends: 160 [2020-09-11 12:02:38,275 INFO L226 Difference]: Without dead ends: 155 [2020-09-11 12:02:38,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-11 12:02:38,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-09-11 12:02:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-11 12:02:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-09-11 12:02:38,279 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-09-11 12:02:38,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:38,279 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-09-11 12:02:38,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:38,280 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-09-11 12:02:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:38,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:38,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:38,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:38,491 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-09-11 12:02:38,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:38,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039326219] [2020-09-11 12:02:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039326219] [2020-09-11 12:02:38,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491028185] [2020-09-11 12:02:38,567 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 [2020-09-11 12:02:38,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:38,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:38,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:38,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:38,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:38,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:38,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:38,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767070976] [2020-09-11 12:02:38,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:38,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:38,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:38,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:38,756 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-09-11 12:02:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:39,161 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-09-11 12:02:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:39,162 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:39,163 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:39,164 INFO L226 Difference]: Without dead ends: 181 [2020-09-11 12:02:39,164 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 [2020-09-11 12:02:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-09-11 12:02:39,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-09-11 12:02:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-09-11 12:02:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-09-11 12:02:39,168 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-09-11 12:02:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:39,168 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-09-11 12:02:39,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-09-11 12:02:39,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:39,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:39,169 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:39,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:39,376 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-09-11 12:02:39,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:39,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565268107] [2020-09-11 12:02:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565268107] [2020-09-11 12:02:39,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959061871] [2020-09-11 12:02:39,469 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 [2020-09-11 12:02:39,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:39,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:39,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:39,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:39,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:39,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816889913] [2020-09-11 12:02:39,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:39,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:39,632 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-09-11 12:02:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:39,943 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-09-11 12:02:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:02:39,943 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:39,944 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:39,944 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:39,945 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 [2020-09-11 12:02:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-09-11 12:02:39,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-11 12:02:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-09-11 12:02:39,948 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-09-11 12:02:39,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:39,949 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-09-11 12:02:39,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:39,949 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-09-11 12:02:39,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:39,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:39,950 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:40,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-09-11 12:02:40,159 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:40,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:40,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-09-11 12:02:40,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:40,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051738260] [2020-09-11 12:02:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051738260] [2020-09-11 12:02:40,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474825778] [2020-09-11 12:02:40,242 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 [2020-09-11 12:02:40,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:40,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:40,386 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:40,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:40,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:40,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506864367] [2020-09-11 12:02:40,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:40,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:40,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:40,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:40,397 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-09-11 12:02:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:40,800 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-09-11 12:02:40,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:02:40,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:40,803 INFO L225 Difference]: With dead ends: 192 [2020-09-11 12:02:40,803 INFO L226 Difference]: Without dead ends: 184 [2020-09-11 12:02:40,803 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 [2020-09-11 12:02:40,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-11 12:02:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-09-11 12:02:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-11 12:02:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-09-11 12:02:40,808 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-09-11 12:02:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:40,808 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-09-11 12:02:40,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-09-11 12:02:40,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:40,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:40,809 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:41,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:41,010 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:41,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-09-11 12:02:41,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:41,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622967650] [2020-09-11 12:02:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622967650] [2020-09-11 12:02:41,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078367923] [2020-09-11 12:02:41,098 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 [2020-09-11 12:02:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:02:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:41,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:41,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-09-11 12:02:41,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372389283] [2020-09-11 12:02:41,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:02:41,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:02:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:02:41,252 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-09-11 12:02:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:41,673 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-09-11 12:02:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:02:41,673 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-09-11 12:02:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:41,675 INFO L225 Difference]: With dead ends: 180 [2020-09-11 12:02:41,675 INFO L226 Difference]: Without dead ends: 175 [2020-09-11 12:02:41,676 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 [2020-09-11 12:02:41,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-11 12:02:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-09-11 12:02:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-11 12:02:41,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-09-11 12:02:41,680 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-09-11 12:02:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:41,680 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-09-11 12:02:41,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:02:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-09-11 12:02:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:41,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:41,681 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:41,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-09-11 12:02:41,882 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-09-11 12:02:41,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:41,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928018734] [2020-09-11 12:02:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:41,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928018734] [2020-09-11 12:02:41,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750067460] [2020-09-11 12:02:41,979 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 [2020-09-11 12:02:42,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:42,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:42,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:42,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:02:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:02:42,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465007776] [2020-09-11 12:02:42,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:02:42,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:02:42,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:42,197 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-09-11 12:02:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:42,379 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-09-11 12:02:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:42,379 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-09-11 12:02:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:42,381 INFO L225 Difference]: With dead ends: 164 [2020-09-11 12:02:42,381 INFO L226 Difference]: Without dead ends: 159 [2020-09-11 12:02:42,381 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 [2020-09-11 12:02:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-11 12:02:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-09-11 12:02:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-11 12:02:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-09-11 12:02:42,384 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-09-11 12:02:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:42,385 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-09-11 12:02:42,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:02:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-09-11 12:02:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:42,385 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:42,385 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:42,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:42,586 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-09-11 12:02:42,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:42,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960958356] [2020-09-11 12:02:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960958356] [2020-09-11 12:02:42,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217541508] [2020-09-11 12:02:42,745 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 [2020-09-11 12:02:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:42,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:42,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:42,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389002608] [2020-09-11 12:02:42,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:42,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:42,959 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-09-11 12:02:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:43,022 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-09-11 12:02:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:43,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:43,024 INFO L225 Difference]: With dead ends: 156 [2020-09-11 12:02:43,024 INFO L226 Difference]: Without dead ends: 153 [2020-09-11 12:02:43,024 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 [2020-09-11 12:02:43,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-11 12:02:43,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-09-11 12:02:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:43,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:43,028 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:43,028 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:43,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:43,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:43,029 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:02:43,237 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-09-11 12:02:43,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451075579] [2020-09-11 12:02:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451075579] [2020-09-11 12:02:43,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231514712] [2020-09-11 12:02:43,399 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 [2020-09-11 12:02:43,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:43,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:43,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:43,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:43,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:43,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:43,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723303126] [2020-09-11 12:02:43,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:43,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:43,594 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:43,681 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-09-11 12:02:43,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:43,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:43,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:43,683 INFO L225 Difference]: With dead ends: 170 [2020-09-11 12:02:43,683 INFO L226 Difference]: Without dead ends: 167 [2020-09-11 12:02:43,683 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 [2020-09-11 12:02:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-09-11 12:02:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-09-11 12:02:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-09-11 12:02:43,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-09-11 12:02:43,687 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-09-11 12:02:43,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:43,687 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-09-11 12:02:43,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-09-11 12:02:43,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:43,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:43,688 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:43,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:43,890 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:43,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-09-11 12:02:43,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:43,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859510600] [2020-09-11 12:02:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859510600] [2020-09-11 12:02:44,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888130523] [2020-09-11 12:02:44,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:02:44,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:44,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47127982] [2020-09-11 12:02:44,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,220 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-09-11 12:02:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:44,329 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-09-11 12:02:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:44,330 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:44,331 INFO L225 Difference]: With dead ends: 169 [2020-09-11 12:02:44,331 INFO L226 Difference]: Without dead ends: 166 [2020-09-11 12:02:44,332 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 [2020-09-11 12:02:44,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-11 12:02:44,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-09-11 12:02:44,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:02:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-09-11 12:02:44,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-09-11 12:02:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:44,335 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-09-11 12:02:44,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-09-11 12:02:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:44,336 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:44,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:44,537 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:44,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-09-11 12:02:44,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:44,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321871301] [2020-09-11 12:02:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321871301] [2020-09-11 12:02:44,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691469933] [2020-09-11 12:02:44,650 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 [2020-09-11 12:02:44,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:02:44,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:44,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:44,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:44,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:44,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791423845] [2020-09-11 12:02:44,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:44,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:44,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:44,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:44,853 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-09-11 12:02:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:44,987 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-09-11 12:02:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:44,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:44,989 INFO L225 Difference]: With dead ends: 168 [2020-09-11 12:02:44,989 INFO L226 Difference]: Without dead ends: 165 [2020-09-11 12:02:44,990 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 [2020-09-11 12:02:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-11 12:02:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-09-11 12:02:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-09-11 12:02:44,993 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-09-11 12:02:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:44,993 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-09-11 12:02:44,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-09-11 12:02:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:44,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:44,994 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-09-11 12:02:45,195 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-09-11 12:02:45,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38895240] [2020-09-11 12:02:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38895240] [2020-09-11 12:02:45,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460450393] [2020-09-11 12:02:45,307 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 [2020-09-11 12:02:45,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:45,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:45,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869336552] [2020-09-11 12:02:45,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:45,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:45,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:45,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:45,509 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-09-11 12:02:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:45,674 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-09-11 12:02:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:45,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:45,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:45,676 INFO L225 Difference]: With dead ends: 167 [2020-09-11 12:02:45,676 INFO L226 Difference]: Without dead ends: 164 [2020-09-11 12:02:45,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:02:45,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-11 12:02:45,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-09-11 12:02:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-09-11 12:02:45,680 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-09-11 12:02:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:45,680 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-09-11 12:02:45,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-09-11 12:02:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:02:45,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:45,680 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:45,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:45,882 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-09-11 12:02:45,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:45,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913993105] [2020-09-11 12:02:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:45,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913993105] [2020-09-11 12:02:45,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282641564] [2020-09-11 12:02:45,988 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 [2020-09-11 12:02:46,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:46,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:46,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:46,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,167 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:02:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044047694] [2020-09-11 12:02:46,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,183 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-09-11 12:02:46,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:46,432 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-09-11 12:02:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:46,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-09-11 12:02:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:46,434 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:46,434 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:46,435 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 [2020-09-11 12:02:46,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-09-11 12:02:46,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-11 12:02:46,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-09-11 12:02:46,437 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-09-11 12:02:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:46,438 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-09-11 12:02:46,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-09-11 12:02:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:46,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:46,438 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:46,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:46,639 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:46,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-09-11 12:02:46,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:46,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123595448] [2020-09-11 12:02:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123595448] [2020-09-11 12:02:46,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420966413] [2020-09-11 12:02:46,769 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 [2020-09-11 12:02:46,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:46,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:46,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:46,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:46,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:46,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:46,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426362484] [2020-09-11 12:02:46,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:46,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:46,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:46,975 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-09-11 12:02:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,039 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-09-11 12:02:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:02:47,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,041 INFO L225 Difference]: With dead ends: 163 [2020-09-11 12:02:47,042 INFO L226 Difference]: Without dead ends: 161 [2020-09-11 12:02:47,042 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 [2020-09-11 12:02:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-11 12:02:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-09-11 12:02:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:47,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-09-11 12:02:47,045 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-09-11 12:02:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,045 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-09-11 12:02:47,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-09-11 12:02:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,046 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:47,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-09-11 12:02:47,247 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-09-11 12:02:47,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:47,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81844788] [2020-09-11 12:02:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:47,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81844788] [2020-09-11 12:02:47,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431968084] [2020-09-11 12:02:47,361 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 [2020-09-11 12:02:47,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:47,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:47,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:47,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:47,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:47,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:47,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736226370] [2020-09-11 12:02:47,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:47,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:47,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:47,566 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:47,739 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-09-11 12:02:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:47,740 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:47,741 INFO L225 Difference]: With dead ends: 172 [2020-09-11 12:02:47,742 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 12:02:47,742 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 [2020-09-11 12:02:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 12:02:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-09-11 12:02:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:47,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:47,746 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:47,746 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:47,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:47,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:47,747 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:47,747 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:47,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:47,958 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:47,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-09-11 12:02:47,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:47,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046879298] [2020-09-11 12:02:47,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:48,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:48,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046879298] [2020-09-11 12:02:48,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991992628] [2020-09-11 12:02:48,077 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 [2020-09-11 12:02:48,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:48,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:48,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:48,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520323331] [2020-09-11 12:02:48,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:48,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:48,814 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:49,044 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:49,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:49,046 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:49,046 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:49,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-09-11 12:02:49,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-11 12:02:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-09-11 12:02:49,050 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-09-11 12:02:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:49,050 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-09-11 12:02:49,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:49,051 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-09-11 12:02:49,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:49,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:49,051 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:49,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-09-11 12:02:49,260 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-09-11 12:02:49,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:49,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38374649] [2020-09-11 12:02:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38374649] [2020-09-11 12:02:49,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978139534] [2020-09-11 12:02:49,374 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 [2020-09-11 12:02:49,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:49,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:49,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:49,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:49,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:49,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431728907] [2020-09-11 12:02:49,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:49,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:49,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:49,578 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-09-11 12:02:49,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:49,813 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-09-11 12:02:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:02:49,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:49,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:49,816 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:49,816 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:49,816 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 [2020-09-11 12:02:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-09-11 12:02:49,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-09-11 12:02:49,820 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-09-11 12:02:49,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:49,820 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-09-11 12:02:49,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:49,821 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-09-11 12:02:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:49,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:50,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 12:02:50,023 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:50,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:50,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-09-11 12:02:50,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:50,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664906271] [2020-09-11 12:02:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664906271] [2020-09-11 12:02:50,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621176236] [2020-09-11 12:02:50,136 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 [2020-09-11 12:02:50,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:50,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:50,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:50,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:50,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624165386] [2020-09-11 12:02:50,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:50,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:50,318 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-09-11 12:02:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:50,561 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-09-11 12:02:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:50,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:50,563 INFO L225 Difference]: With dead ends: 184 [2020-09-11 12:02:50,563 INFO L226 Difference]: Without dead ends: 182 [2020-09-11 12:02:50,563 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 [2020-09-11 12:02:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-11 12:02:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-09-11 12:02:50,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:02:50,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-09-11 12:02:50,568 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-09-11 12:02:50,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:50,568 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-09-11 12:02:50,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-09-11 12:02:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:50,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:50,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-09-11 12:02:50,773 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-09-11 12:02:50,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:50,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376878537] [2020-09-11 12:02:50,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:50,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376878537] [2020-09-11 12:02:50,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434925800] [2020-09-11 12:02:50,896 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 [2020-09-11 12:02:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:50,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:51,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:51,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819986817] [2020-09-11 12:02:51,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:51,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:51,114 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-09-11 12:02:51,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:51,382 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-09-11 12:02:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:51,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:51,384 INFO L225 Difference]: With dead ends: 179 [2020-09-11 12:02:51,385 INFO L226 Difference]: Without dead ends: 177 [2020-09-11 12:02:51,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-09-11 12:02:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-09-11 12:02:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-09-11 12:02:51,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-09-11 12:02:51,390 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-09-11 12:02:51,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:51,391 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-09-11 12:02:51,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:51,391 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-09-11 12:02:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:51,392 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:51,392 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:51,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:51,593 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:51,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:51,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-09-11 12:02:51,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:51,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484652016] [2020-09-11 12:02:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484652016] [2020-09-11 12:02:51,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637955632] [2020-09-11 12:02:51,703 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 [2020-09-11 12:02:51,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:51,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:51,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:51,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:51,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:51,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221942805] [2020-09-11 12:02:51,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:51,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:51,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:51,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:51,872 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-09-11 12:02:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:52,076 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-09-11 12:02:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:52,077 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:52,078 INFO L225 Difference]: With dead ends: 176 [2020-09-11 12:02:52,078 INFO L226 Difference]: Without dead ends: 174 [2020-09-11 12:02:52,079 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 [2020-09-11 12:02:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-09-11 12:02:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-09-11 12:02:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:52,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-09-11 12:02:52,083 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-09-11 12:02:52,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:52,083 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-09-11 12:02:52,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:52,083 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-09-11 12:02:52,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:52,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:52,084 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:52,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:52,285 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:52,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-09-11 12:02:52,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:52,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366316589] [2020-09-11 12:02:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366316589] [2020-09-11 12:02:52,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667946337] [2020-09-11 12:02:52,413 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 [2020-09-11 12:02:52,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:02:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:52,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:52,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:52,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647379265] [2020-09-11 12:02:52,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:52,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:52,620 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-09-11 12:02:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:52,876 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:52,876 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:52,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:52,878 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:52,878 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:52,879 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 [2020-09-11 12:02:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-09-11 12:02:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-09-11 12:02:52,882 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-09-11 12:02:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-09-11 12:02:52,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-09-11 12:02:52,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:52,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:52,883 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:53,083 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-09-11 12:02:53,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:53,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681491330] [2020-09-11 12:02:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681491330] [2020-09-11 12:02:53,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393504025] [2020-09-11 12:02:53,196 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 [2020-09-11 12:02:53,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:53,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:53,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:53,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:53,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:53,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:53,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:53,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631744021] [2020-09-11 12:02:53,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:53,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:53,388 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-09-11 12:02:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:53,638 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-09-11 12:02:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:02:53,639 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:53,640 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:53,640 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:53,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:53,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-09-11 12:02:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-11 12:02:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-09-11 12:02:53,644 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-09-11 12:02:53,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:53,644 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-09-11 12:02:53,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-09-11 12:02:53,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:53,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:53,645 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:53,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:53,846 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:53,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-09-11 12:02:53,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:53,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841146] [2020-09-11 12:02:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841146] [2020-09-11 12:02:54,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237905882] [2020-09-11 12:02:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:02:54,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:54,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:54,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:54,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744753176] [2020-09-11 12:02:54,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:54,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:54,203 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-09-11 12:02:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:54,285 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-09-11 12:02:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:02:54,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:54,288 INFO L225 Difference]: With dead ends: 182 [2020-09-11 12:02:54,288 INFO L226 Difference]: Without dead ends: 180 [2020-09-11 12:02:54,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:02:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-11 12:02:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-09-11 12:02:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:02:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-09-11 12:02:54,293 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-09-11 12:02:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:54,293 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-09-11 12:02:54,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:54,294 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-09-11 12:02:54,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:54,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:54,294 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:54,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-09-11 12:02:54,496 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:54,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-09-11 12:02:54,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:54,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555690819] [2020-09-11 12:02:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555690819] [2020-09-11 12:02:54,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907348320] [2020-09-11 12:02:54,657 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 [2020-09-11 12:02:54,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:54,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:54,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:54,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:54,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:54,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128359792] [2020-09-11 12:02:54,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:54,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:54,865 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-09-11 12:02:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:55,085 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-09-11 12:02:55,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:55,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:55,087 INFO L225 Difference]: With dead ends: 185 [2020-09-11 12:02:55,087 INFO L226 Difference]: Without dead ends: 183 [2020-09-11 12:02:55,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:02:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-09-11 12:02:55,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-09-11 12:02:55,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:55,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:55,092 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:55,092 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:55,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:55,093 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:55,093 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:55,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:55,294 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:55,295 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-09-11 12:02:55,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:55,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103578618] [2020-09-11 12:02:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103578618] [2020-09-11 12:02:55,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807941023] [2020-09-11 12:02:55,430 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 [2020-09-11 12:02:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:55,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:55,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:55,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:55,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037176182] [2020-09-11 12:02:55,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:55,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:55,689 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:55,963 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-09-11 12:02:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:02:55,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:55,966 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:02:55,966 INFO L226 Difference]: Without dead ends: 189 [2020-09-11 12:02:55,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:02:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-09-11 12:02:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-09-11 12:02:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:02:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-09-11 12:02:55,970 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-09-11 12:02:55,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:55,970 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-09-11 12:02:55,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-09-11 12:02:55,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:55,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:55,973 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:56,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:56,176 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-09-11 12:02:56,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:56,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589035575] [2020-09-11 12:02:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589035575] [2020-09-11 12:02:56,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718104946] [2020-09-11 12:02:56,295 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 [2020-09-11 12:02:56,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:02:56,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:56,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:56,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:56,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:56,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128554236] [2020-09-11 12:02:56,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:56,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:56,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:56,490 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-09-11 12:02:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:56,775 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-09-11 12:02:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:56,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:56,777 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:02:56,777 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:02:56,778 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 [2020-09-11 12:02:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:02:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-09-11 12:02:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-09-11 12:02:56,782 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-09-11 12:02:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:56,782 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-09-11 12:02:56,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-09-11 12:02:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:56,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:56,783 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:56,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-09-11 12:02:56,991 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:56,992 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-09-11 12:02:56,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:56,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571256239] [2020-09-11 12:02:56,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571256239] [2020-09-11 12:02:57,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376310997] [2020-09-11 12:02:57,111 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 [2020-09-11 12:02:57,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:02:57,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:57,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:57,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152530080] [2020-09-11 12:02:57,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:57,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:57,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:57,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:57,294 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-09-11 12:02:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:57,605 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-09-11 12:02:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:57,606 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:57,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:57,607 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:02:57,607 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:02:57,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:02:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:02:57,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-09-11 12:02:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:02:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-09-11 12:02:57,611 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-09-11 12:02:57,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:57,611 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-09-11 12:02:57,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:57,611 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-09-11 12:02:57,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:57,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:57,612 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:57,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:57,820 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:57,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-09-11 12:02:57,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:57,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549162462] [2020-09-11 12:02:57,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:57,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549162462] [2020-09-11 12:02:57,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459548934] [2020-09-11 12:02:57,936 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 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 [2020-09-11 12:02:57,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:02:57,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:58,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:58,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618668751] [2020-09-11 12:02:58,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:58,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:58,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:58,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:58,136 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-09-11 12:02:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:58,473 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-09-11 12:02:58,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:02:58,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:58,475 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:02:58,475 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:02:58,476 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 [2020-09-11 12:02:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:02:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-09-11 12:02:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:02:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-09-11 12:02:58,480 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-09-11 12:02:58,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:58,480 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-09-11 12:02:58,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-09-11 12:02:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:58,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:58,481 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:58,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-09-11 12:02:58,689 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-09-11 12:02:58,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:58,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656650189] [2020-09-11 12:02:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:58,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656650189] [2020-09-11 12:02:58,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708769035] [2020-09-11 12:02:58,844 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 [2020-09-11 12:02:58,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:02:58,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:58,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:59,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:59,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307367516] [2020-09-11 12:02:59,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:59,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:59,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:59,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:59,047 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-09-11 12:02:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:59,152 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-09-11 12:02:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:02:59,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:59,155 INFO L225 Difference]: With dead ends: 178 [2020-09-11 12:02:59,155 INFO L226 Difference]: Without dead ends: 176 [2020-09-11 12:02:59,155 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 [2020-09-11 12:02:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-09-11 12:02:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-09-11 12:02:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:02:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-09-11 12:02:59,159 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-09-11 12:02:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:59,159 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-09-11 12:02:59,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-09-11 12:02:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:59,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:59,160 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:02:59,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:02:59,362 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:02:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:02:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-09-11 12:02:59,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:02:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946387225] [2020-09-11 12:02:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:02:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:02:59,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946387225] [2020-09-11 12:02:59,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218242535] [2020-09-11 12:02:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:02:59,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:02:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:02:59,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:02:59,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:02:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:02:59,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:02:59,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:02:59,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005113048] [2020-09-11 12:02:59,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:02:59,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:02:59,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:02:59,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:02:59,689 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-09-11 12:02:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:02:59,931 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-09-11 12:02:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:02:59,933 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:02:59,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:02:59,934 INFO L225 Difference]: With dead ends: 193 [2020-09-11 12:02:59,934 INFO L226 Difference]: Without dead ends: 191 [2020-09-11 12:02:59,934 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 [2020-09-11 12:02:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-11 12:02:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-09-11 12:02:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:02:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-09-11 12:02:59,940 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-09-11 12:02:59,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:02:59,940 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-09-11 12:02:59,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:02:59,941 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-09-11 12:02:59,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:02:59,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:02:59,941 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:00,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-09-11 12:03:00,147 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-09-11 12:03:00,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:00,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411993504] [2020-09-11 12:03:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411993504] [2020-09-11 12:03:00,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068663366] [2020-09-11 12:03:00,261 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 [2020-09-11 12:03:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:00,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:00,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:00,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:00,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882178732] [2020-09-11 12:03:00,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:00,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:00,575 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-09-11 12:03:00,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:00,884 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-09-11 12:03:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:00,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:00,886 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:00,886 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:03:00,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:03:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:03:00,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-09-11 12:03:00,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:03:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-09-11 12:03:00,890 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-09-11 12:03:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:00,890 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-09-11 12:03:00,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-09-11 12:03:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:00,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:00,891 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:01,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:01,096 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:01,096 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-09-11 12:03:01,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:01,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056801373] [2020-09-11 12:03:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056801373] [2020-09-11 12:03:01,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236643154] [2020-09-11 12:03:01,232 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 [2020-09-11 12:03:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:01,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:01,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:01,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769964615] [2020-09-11 12:03:01,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:01,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:01,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:01,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:01,400 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-09-11 12:03:01,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:01,537 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-09-11 12:03:01,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:03:01,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:01,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:01,540 INFO L225 Difference]: With dead ends: 174 [2020-09-11 12:03:01,540 INFO L226 Difference]: Without dead ends: 172 [2020-09-11 12:03:01,540 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 [2020-09-11 12:03:01,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-11 12:03:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-09-11 12:03:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-09-11 12:03:01,544 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-09-11 12:03:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:01,544 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-09-11 12:03:01,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-09-11 12:03:01,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:01,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:01,545 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:01,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-09-11 12:03:01,746 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:01,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:01,747 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-09-11 12:03:01,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:01,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981793701] [2020-09-11 12:03:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:01,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981793701] [2020-09-11 12:03:01,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313236848] [2020-09-11 12:03:01,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:03:01,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:01,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:01,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:01,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:02,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:02,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135945056] [2020-09-11 12:03:02,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:02,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:02,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:02,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:02,067 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-09-11 12:03:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:02,368 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-09-11 12:03:02,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:02,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:02,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:02,370 INFO L225 Difference]: With dead ends: 189 [2020-09-11 12:03:02,370 INFO L226 Difference]: Without dead ends: 187 [2020-09-11 12:03:02,370 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 [2020-09-11 12:03:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-09-11 12:03:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-09-11 12:03:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-09-11 12:03:02,374 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-09-11 12:03:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:02,374 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-09-11 12:03:02,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-09-11 12:03:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:02,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:02,375 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:02,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:02,584 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:02,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:02,584 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-09-11 12:03:02,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:02,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201992706] [2020-09-11 12:03:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201992706] [2020-09-11 12:03:02,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42269077] [2020-09-11 12:03:02,698 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 [2020-09-11 12:03:02,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:02,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:02,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:02,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:02,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791495014] [2020-09-11 12:03:02,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:02,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:02,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:02,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:02,894 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:03,067 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-09-11 12:03:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:03:03,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:03,069 INFO L225 Difference]: With dead ends: 175 [2020-09-11 12:03:03,069 INFO L226 Difference]: Without dead ends: 173 [2020-09-11 12:03:03,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:03:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-11 12:03:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-09-11 12:03:03,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:03,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:03,073 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:03,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:03,073 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:03,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:03,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:03,074 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:03,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:03,275 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-09-11 12:03:03,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:03,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12789510] [2020-09-11 12:03:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12789510] [2020-09-11 12:03:03,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888917894] [2020-09-11 12:03:03,371 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 [2020-09-11 12:03:03,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:03,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:03,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:03,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:03,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440939932] [2020-09-11 12:03:03,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:03,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:03,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:03,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:03,597 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:04,007 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-09-11 12:03:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:04,008 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:04,009 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:04,010 INFO L226 Difference]: Without dead ends: 190 [2020-09-11 12:03:04,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:03:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-11 12:03:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-09-11 12:03:04,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:04,014 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:04,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:04,014 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:04,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:04,014 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:04,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:04,015 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:04,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:04,215 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-09-11 12:03:04,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:04,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073570927] [2020-09-11 12:03:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073570927] [2020-09-11 12:03:04,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802167366] [2020-09-11 12:03:04,323 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 [2020-09-11 12:03:04,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:04,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:04,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:04,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:04,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:04,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:04,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046742216] [2020-09-11 12:03:04,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:04,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:04,533 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:04,850 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-09-11 12:03:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:03:04,851 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:04,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:04,852 INFO L225 Difference]: With dead ends: 187 [2020-09-11 12:03:04,853 INFO L226 Difference]: Without dead ends: 185 [2020-09-11 12:03:04,853 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 [2020-09-11 12:03:04,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-11 12:03:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-09-11 12:03:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:04,857 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:04,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:04,857 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:04,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:04,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:04,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:04,858 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:05,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:05,062 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:05,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:05,063 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-09-11 12:03:05,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:05,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962294948] [2020-09-11 12:03:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962294948] [2020-09-11 12:03:05,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647659365] [2020-09-11 12:03:05,162 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 [2020-09-11 12:03:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:05,344 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:05,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:05,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:05,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250336717] [2020-09-11 12:03:05,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:05,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:05,387 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:05,925 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-09-11 12:03:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:03:05,926 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:05,928 INFO L225 Difference]: With dead ends: 212 [2020-09-11 12:03:05,928 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:05,928 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 [2020-09-11 12:03:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:05,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:05,932 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:05,932 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:05,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:05,933 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:06,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-09-11 12:03:06,134 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-09-11 12:03:06,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:06,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196806884] [2020-09-11 12:03:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:06,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196806884] [2020-09-11 12:03:06,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993877416] [2020-09-11 12:03:06,243 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 [2020-09-11 12:03:06,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:06,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:06,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:06,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:06,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:06,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313643792] [2020-09-11 12:03:06,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:06,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:06,434 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:06,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:06,833 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-09-11 12:03:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:06,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:06,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:06,836 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:06,836 INFO L226 Difference]: Without dead ends: 197 [2020-09-11 12:03:06,836 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 [2020-09-11 12:03:06,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-09-11 12:03:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-09-11 12:03:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-09-11 12:03:06,839 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-09-11 12:03:06,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:06,839 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-09-11 12:03:06,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-09-11 12:03:06,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:06,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:06,840 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:07,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:07,047 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:07,048 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-09-11 12:03:07,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:07,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117675415] [2020-09-11 12:03:07,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117675415] [2020-09-11 12:03:07,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005788127] [2020-09-11 12:03:07,152 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 [2020-09-11 12:03:07,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:07,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:07,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:07,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:07,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:07,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976600856] [2020-09-11 12:03:07,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:07,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:07,472 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-09-11 12:03:07,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:07,820 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-09-11 12:03:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:07,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:07,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:07,823 INFO L225 Difference]: With dead ends: 198 [2020-09-11 12:03:07,823 INFO L226 Difference]: Without dead ends: 196 [2020-09-11 12:03:07,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:07,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-11 12:03:07,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-09-11 12:03:07,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-09-11 12:03:07,828 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-09-11 12:03:07,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:07,828 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-09-11 12:03:07,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-09-11 12:03:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:07,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:07,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:08,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 12:03:08,031 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:08,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-09-11 12:03:08,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:08,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278871464] [2020-09-11 12:03:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:08,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278871464] [2020-09-11 12:03:08,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093678547] [2020-09-11 12:03:08,136 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 [2020-09-11 12:03:08,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:08,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:08,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:08,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964255992] [2020-09-11 12:03:08,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:08,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:08,395 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-09-11 12:03:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:08,891 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-09-11 12:03:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:03:08,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:08,893 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:03:08,893 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:03:08,894 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 [2020-09-11 12:03:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:03:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-09-11 12:03:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-09-11 12:03:08,897 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-09-11 12:03:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:08,898 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-09-11 12:03:08,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-09-11 12:03:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:08,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:08,898 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:09,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 12:03:09,099 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-09-11 12:03:09,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:09,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632904059] [2020-09-11 12:03:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632904059] [2020-09-11 12:03:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570988898] [2020-09-11 12:03:09,206 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 [2020-09-11 12:03:09,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:09,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:09,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:09,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:09,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:09,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520774423] [2020-09-11 12:03:09,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:09,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:09,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:09,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:09,446 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-09-11 12:03:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:10,100 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-09-11 12:03:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:10,101 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:10,102 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:10,102 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:10,103 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 [2020-09-11 12:03:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-09-11 12:03:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:03:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-09-11 12:03:10,107 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-09-11 12:03:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:10,107 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-09-11 12:03:10,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-09-11 12:03:10,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:10,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:10,108 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:10,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-09-11 12:03:10,314 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:10,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:10,315 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-09-11 12:03:10,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:10,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913332688] [2020-09-11 12:03:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:10,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913332688] [2020-09-11 12:03:10,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566466698] [2020-09-11 12:03:10,423 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 [2020-09-11 12:03:10,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:10,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:10,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:12,666 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:12,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:12,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:12,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566989551] [2020-09-11 12:03:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:12,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:12,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:12,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-09-11 12:03:12,703 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-09-11 12:03:17,035 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-09-11 12:03:21,265 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-09-11 12:03:21,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:21,790 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-09-11 12:03:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:21,790 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:21,792 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:03:21,792 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:03:21,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-09-11 12:03:21,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:03:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-09-11 12:03:21,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:03:21,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-09-11 12:03:21,797 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-09-11 12:03:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:21,797 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-09-11 12:03:21,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-09-11 12:03:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:21,798 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:21,798 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:22,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 12:03:22,008 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:22,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-09-11 12:03:22,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:22,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984317557] [2020-09-11 12:03:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:22,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984317557] [2020-09-11 12:03:22,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922972058] [2020-09-11 12:03:22,123 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 [2020-09-11 12:03:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:22,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:22,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:22,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:22,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:22,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:22,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358376387] [2020-09-11 12:03:22,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:22,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:22,375 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-09-11 12:03:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:23,034 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-09-11 12:03:23,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:23,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:23,036 INFO L225 Difference]: With dead ends: 219 [2020-09-11 12:03:23,036 INFO L226 Difference]: Without dead ends: 214 [2020-09-11 12:03:23,036 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 [2020-09-11 12:03:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-11 12:03:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-09-11 12:03:23,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:03:23,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-09-11 12:03:23,040 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-09-11 12:03:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:23,041 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-09-11 12:03:23,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:23,041 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-09-11 12:03:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:23,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:23,042 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:23,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:23,248 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:23,249 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-09-11 12:03:23,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:23,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729586507] [2020-09-11 12:03:23,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729586507] [2020-09-11 12:03:23,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155521312] [2020-09-11 12:03:23,360 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 [2020-09-11 12:03:23,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:23,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:23,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:23,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:23,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:23,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:23,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242500084] [2020-09-11 12:03:23,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:23,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:23,568 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-09-11 12:03:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:23,878 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-09-11 12:03:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:23,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:23,880 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:23,880 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:23,880 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 [2020-09-11 12:03:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-09-11 12:03:23,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-09-11 12:03:23,885 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-09-11 12:03:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:23,885 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-09-11 12:03:23,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-09-11 12:03:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:23,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:23,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:24,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:24,089 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:24,090 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-09-11 12:03:24,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:24,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488855063] [2020-09-11 12:03:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488855063] [2020-09-11 12:03:24,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533319282] [2020-09-11 12:03:24,182 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 [2020-09-11 12:03:24,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:24,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:24,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:24,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:24,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769210715] [2020-09-11 12:03:24,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:24,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:24,396 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-09-11 12:03:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:24,729 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-09-11 12:03:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:24,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:24,731 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:03:24,731 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:03:24,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:03:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:03:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-09-11 12:03:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-09-11 12:03:24,735 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-09-11 12:03:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:24,736 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-09-11 12:03:24,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-09-11 12:03:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:24,737 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:24,737 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:24,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-09-11 12:03:24,945 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:24,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:24,946 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-09-11 12:03:24,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:24,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243883440] [2020-09-11 12:03:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:24,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243883440] [2020-09-11 12:03:25,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947730316] [2020-09-11 12:03:25,056 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 [2020-09-11 12:03:25,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:25,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:25,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:25,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:25,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629524571] [2020-09-11 12:03:25,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:25,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:25,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:25,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:25,278 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-09-11 12:03:25,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:25,633 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-09-11 12:03:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:03:25,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:25,635 INFO L225 Difference]: With dead ends: 197 [2020-09-11 12:03:25,635 INFO L226 Difference]: Without dead ends: 195 [2020-09-11 12:03:25,636 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 [2020-09-11 12:03:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-11 12:03:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-09-11 12:03:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-09-11 12:03:25,640 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-09-11 12:03:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:25,640 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-09-11 12:03:25,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-09-11 12:03:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:25,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:25,641 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:25,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 12:03:25,842 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-09-11 12:03:25,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:25,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910060985] [2020-09-11 12:03:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:25,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:25,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910060985] [2020-09-11 12:03:25,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208029816] [2020-09-11 12:03:25,932 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 [2020-09-11 12:03:25,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:26,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:26,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:26,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627121035] [2020-09-11 12:03:26,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:26,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:26,206 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-09-11 12:03:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:26,777 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-09-11 12:03:26,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:03:26,777 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:26,778 INFO L225 Difference]: With dead ends: 214 [2020-09-11 12:03:26,778 INFO L226 Difference]: Without dead ends: 212 [2020-09-11 12:03:26,779 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 [2020-09-11 12:03:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-11 12:03:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-09-11 12:03:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:03:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-09-11 12:03:26,782 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-09-11 12:03:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:26,783 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-09-11 12:03:26,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-09-11 12:03:26,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:26,784 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:26,784 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:26,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 12:03:26,993 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:26,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-09-11 12:03:26,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:26,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923980631] [2020-09-11 12:03:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923980631] [2020-09-11 12:03:27,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600898406] [2020-09-11 12:03:27,087 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 [2020-09-11 12:03:27,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:27,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:27,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:27,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:27,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051904224] [2020-09-11 12:03:27,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:27,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:27,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:27,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:27,288 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-09-11 12:03:27,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:27,783 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-09-11 12:03:27,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:27,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:27,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:27,785 INFO L225 Difference]: With dead ends: 217 [2020-09-11 12:03:27,785 INFO L226 Difference]: Without dead ends: 215 [2020-09-11 12:03:27,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:03:27,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-11 12:03:27,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-09-11 12:03:27,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:27,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:27,789 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:27,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:27,789 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:27,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:27,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:27,790 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:27,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:27,990 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:27,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:27,991 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-09-11 12:03:27,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:27,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386489236] [2020-09-11 12:03:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:28,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386489236] [2020-09-11 12:03:28,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93046259] [2020-09-11 12:03:28,102 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 [2020-09-11 12:03:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:28,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:28,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:28,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547741463] [2020-09-11 12:03:28,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:28,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:28,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:28,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:28,309 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:28,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:28,808 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-09-11 12:03:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:03:28,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:28,809 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:28,809 INFO L226 Difference]: Without dead ends: 209 [2020-09-11 12:03:28,810 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 [2020-09-11 12:03:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-11 12:03:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-09-11 12:03:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:28,813 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:28,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:28,814 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:28,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:28,814 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:28,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:28,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:28,814 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:29,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:29,023 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-09-11 12:03:29,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:29,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416136252] [2020-09-11 12:03:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:29,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:29,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416136252] [2020-09-11 12:03:29,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709677493] [2020-09-11 12:03:29,136 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 [2020-09-11 12:03:29,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:29,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:29,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:29,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:29,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056155318] [2020-09-11 12:03:29,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:29,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:29,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:29,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:29,331 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:29,920 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-09-11 12:03:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:03:29,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:29,922 INFO L225 Difference]: With dead ends: 211 [2020-09-11 12:03:29,922 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:03:29,923 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 [2020-09-11 12:03:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:03:29,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-09-11 12:03:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:29,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:29,926 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:29,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:29,926 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:29,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:29,926 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:29,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:29,927 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:30,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 12:03:30,128 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:30,129 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-09-11 12:03:30,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:30,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836425607] [2020-09-11 12:03:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836425607] [2020-09-11 12:03:30,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244506927] [2020-09-11 12:03:30,241 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 [2020-09-11 12:03:30,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:03:30,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:30,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:30,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:30,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:30,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:30,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740741252] [2020-09-11 12:03:30,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:30,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:30,471 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:31,192 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-09-11 12:03:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:03:31,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:31,194 INFO L225 Difference]: With dead ends: 227 [2020-09-11 12:03:31,194 INFO L226 Difference]: Without dead ends: 222 [2020-09-11 12:03:31,195 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 [2020-09-11 12:03:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-11 12:03:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-09-11 12:03:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-09-11 12:03:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-09-11 12:03:31,198 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-09-11 12:03:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:31,198 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-09-11 12:03:31,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-09-11 12:03:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:31,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:31,199 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:31,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-09-11 12:03:31,400 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-09-11 12:03:31,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:31,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225514342] [2020-09-11 12:03:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:31,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225514342] [2020-09-11 12:03:31,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40471485] [2020-09-11 12:03:31,509 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 [2020-09-11 12:03:31,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:03:31,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:31,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:31,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:31,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:31,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:31,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:31,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349320463] [2020-09-11 12:03:31,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:31,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:31,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:31,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:31,718 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-09-11 12:03:32,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:32,307 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-09-11 12:03:32,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:03:32,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:32,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:32,309 INFO L225 Difference]: With dead ends: 221 [2020-09-11 12:03:32,309 INFO L226 Difference]: Without dead ends: 219 [2020-09-11 12:03:32,309 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 [2020-09-11 12:03:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-09-11 12:03:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-09-11 12:03:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-11 12:03:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-09-11 12:03:32,313 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-09-11 12:03:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:32,313 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-09-11 12:03:32,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-09-11 12:03:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:32,314 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:32,314 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:32,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:32,518 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:32,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:32,519 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-09-11 12:03:32,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:32,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305523529] [2020-09-11 12:03:32,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305523529] [2020-09-11 12:03:32,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296259027] [2020-09-11 12:03:32,633 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 [2020-09-11 12:03:32,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:03:32,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:32,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:32,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:03:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:32,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:32,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:32,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327710384] [2020-09-11 12:03:32,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:32,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:32,822 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-09-11 12:03:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:33,545 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-09-11 12:03:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:33,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:33,546 INFO L225 Difference]: With dead ends: 240 [2020-09-11 12:03:33,547 INFO L226 Difference]: Without dead ends: 232 [2020-09-11 12:03:33,547 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 [2020-09-11 12:03:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-11 12:03:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-09-11 12:03:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-09-11 12:03:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-09-11 12:03:33,551 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-09-11 12:03:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:33,551 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-09-11 12:03:33,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-09-11 12:03:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:33,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:33,551 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:33,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 12:03:33,755 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-09-11 12:03:33,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:33,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036482873] [2020-09-11 12:03:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:33,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036482873] [2020-09-11 12:03:33,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303456580] [2020-09-11 12:03:33,851 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 [2020-09-11 12:03:33,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:03:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:34,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:34,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:34,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:34,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049281685] [2020-09-11 12:03:34,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:34,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:34,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:34,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:34,100 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-09-11 12:03:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:34,917 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-09-11 12:03:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:03:34,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:34,919 INFO L225 Difference]: With dead ends: 238 [2020-09-11 12:03:34,919 INFO L226 Difference]: Without dead ends: 230 [2020-09-11 12:03:34,919 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 [2020-09-11 12:03:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-11 12:03:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-09-11 12:03:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:34,923 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:34,923 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:34,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:34,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:34,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:34,924 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:35,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:35,124 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-09-11 12:03:35,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:35,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690109102] [2020-09-11 12:03:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:35,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690109102] [2020-09-11 12:03:35,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413261238] [2020-09-11 12:03:35,236 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 [2020-09-11 12:03:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:35,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:35,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:35,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:35,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085909807] [2020-09-11 12:03:35,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:35,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:35,446 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:35,750 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-09-11 12:03:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:03:35,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:35,751 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:03:35,751 INFO L226 Difference]: Without dead ends: 193 [2020-09-11 12:03:35,752 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 [2020-09-11 12:03:35,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-09-11 12:03:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-09-11 12:03:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:03:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-09-11 12:03:35,756 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-09-11 12:03:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:35,756 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-09-11 12:03:35,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-09-11 12:03:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:35,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:35,756 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:35,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-09-11 12:03:35,957 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:35,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:35,958 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-09-11 12:03:35,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:35,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035461016] [2020-09-11 12:03:35,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:36,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035461016] [2020-09-11 12:03:36,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837829744] [2020-09-11 12:03:36,065 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 [2020-09-11 12:03:36,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:03:36,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:36,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:36,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:36,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:03:36,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529041108] [2020-09-11 12:03:36,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:03:36,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:36,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:03:36,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:03:36,278 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-09-11 12:03:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:03:36,859 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-09-11 12:03:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:03:36,860 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:03:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:03:36,861 INFO L225 Difference]: With dead ends: 206 [2020-09-11 12:03:36,861 INFO L226 Difference]: Without dead ends: 204 [2020-09-11 12:03:36,862 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 [2020-09-11 12:03:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-11 12:03:36,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-09-11 12:03:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-09-11 12:03:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-09-11 12:03:36,864 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-09-11 12:03:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:03:36,865 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-09-11 12:03:36,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:03:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-09-11 12:03:36,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:03:36,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:03:36,865 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:03:37,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:03:37,066 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:03:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:03:37,067 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-09-11 12:03:37,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:03:37,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176372859] [2020-09-11 12:03:37,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:03:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:03:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:37,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176372859] [2020-09-11 12:03:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930405092] [2020-09-11 12:03:37,179 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 [2020-09-11 12:03:37,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:03:37,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:03:37,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:03:37,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:03:37,383 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:03:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:03:38,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:03:38,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-09-11 12:03:38,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357312209] [2020-09-11 12:03:38,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:03:38,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:03:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:03:38,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-09-11 12:03:38,549 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-09-11 12:03:41,052 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 25 [2020-09-11 12:04:03,237 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 29 [2020-09-11 12:04:34,824 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-09-11 12:04:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:57,208 INFO L93 Difference]: Finished difference Result 252 states and 593 transitions. [2020-09-11 12:04:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:04:57,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-09-11 12:04:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:57,211 INFO L225 Difference]: With dead ends: 252 [2020-09-11 12:04:57,211 INFO L226 Difference]: Without dead ends: 247 [2020-09-11 12:04:57,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-09-11 12:04:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-09-11 12:04:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2020-09-11 12:04:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:04:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-09-11 12:04:57,215 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-09-11 12:04:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:57,215 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-09-11 12:04:57,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:04:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-09-11 12:04:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:57,216 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:57,216 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:57,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-09-11 12:04:57,417 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-09-11 12:04:57,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:57,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530959783] [2020-09-11 12:04:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530959783] [2020-09-11 12:04:57,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687015289] [2020-09-11 12:04:57,541 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 [2020-09-11 12:04:57,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:04:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:57,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:57,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:57,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:57,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:57,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982302433] [2020-09-11 12:04:57,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:57,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:57,761 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-09-11 12:04:58,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:58,033 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:04:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:04:58,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:58,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:58,035 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:04:58,035 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:04:58,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:04:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:04:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-09-11 12:04:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:04:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-09-11 12:04:58,040 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-09-11 12:04:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:58,040 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-09-11 12:04:58,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-09-11 12:04:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:58,040 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:58,040 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:58,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:58,241 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:58,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-09-11 12:04:58,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:58,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427149958] [2020-09-11 12:04:58,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:58,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427149958] [2020-09-11 12:04:58,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754258344] [2020-09-11 12:04:58,364 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 [2020-09-11 12:04:58,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:04:58,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:58,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:58,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:58,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:58,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741559034] [2020-09-11 12:04:58,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:58,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:58,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:58,584 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-09-11 12:04:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:58,964 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-09-11 12:04:58,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:58,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:58,966 INFO L225 Difference]: With dead ends: 205 [2020-09-11 12:04:58,966 INFO L226 Difference]: Without dead ends: 203 [2020-09-11 12:04:58,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:58,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-09-11 12:04:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-09-11 12:04:58,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:04:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-09-11 12:04:58,970 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-09-11 12:04:58,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:58,970 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-09-11 12:04:58,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-09-11 12:04:58,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:58,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:58,971 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:04:59,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:04:59,182 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:04:59,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:04:59,183 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-09-11 12:04:59,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:04:59,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722813566] [2020-09-11 12:04:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:04:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:04:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722813566] [2020-09-11 12:04:59,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532970703] [2020-09-11 12:04:59,291 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 [2020-09-11 12:04:59,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:04:59,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:04:59,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:04:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:04:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:04:59,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:04:59,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:04:59,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111222443] [2020-09-11 12:04:59,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:04:59,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:04:59,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:04:59,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:04:59,494 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-09-11 12:04:59,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:04:59,827 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:04:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:04:59,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:04:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:04:59,829 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:04:59,829 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:04:59,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:04:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:04:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-09-11 12:04:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:04:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-09-11 12:04:59,833 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-09-11 12:04:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:04:59,834 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-09-11 12:04:59,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:04:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-09-11 12:04:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:04:59,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:04:59,834 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:00,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:00,043 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:00,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:00,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-09-11 12:05:00,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:00,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999017575] [2020-09-11 12:05:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999017575] [2020-09-11 12:05:00,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81512036] [2020-09-11 12:05:00,140 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 [2020-09-11 12:05:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:00,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:00,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:00,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:00,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:00,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:00,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333867943] [2020-09-11 12:05:00,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:00,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:00,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:00,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:00,380 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-09-11 12:05:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:00,697 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-09-11 12:05:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:00,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:00,699 INFO L225 Difference]: With dead ends: 194 [2020-09-11 12:05:00,699 INFO L226 Difference]: Without dead ends: 192 [2020-09-11 12:05:00,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:05:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-11 12:05:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-09-11 12:05:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:05:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-09-11 12:05:00,702 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-09-11 12:05:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:00,702 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-09-11 12:05:00,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-09-11 12:05:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:00,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:00,703 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:00,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 12:05:00,913 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-09-11 12:05:00,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:00,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883987891] [2020-09-11 12:05:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883987891] [2020-09-11 12:05:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116592284] [2020-09-11 12:05:01,025 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 [2020-09-11 12:05:01,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:01,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:01,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:01,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272087700] [2020-09-11 12:05:01,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:01,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:01,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:01,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:01,259 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-09-11 12:05:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:01,683 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-09-11 12:05:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:05:01,684 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:01,685 INFO L225 Difference]: With dead ends: 209 [2020-09-11 12:05:01,685 INFO L226 Difference]: Without dead ends: 207 [2020-09-11 12:05:01,685 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 [2020-09-11 12:05:01,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-09-11 12:05:01,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-09-11 12:05:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-09-11 12:05:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-09-11 12:05:01,689 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-09-11 12:05:01,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:01,689 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-09-11 12:05:01,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:01,689 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-09-11 12:05:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:01,690 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:01,690 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:01,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:01,891 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-09-11 12:05:01,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:01,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755289456] [2020-09-11 12:05:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755289456] [2020-09-11 12:05:02,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456105820] [2020-09-11 12:05:02,008 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 [2020-09-11 12:05:02,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:02,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:02,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:02,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480904299] [2020-09-11 12:05:02,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:02,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:02,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:02,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:02,239 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-09-11 12:05:02,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:02,633 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-09-11 12:05:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:05:02,634 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:02,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:02,635 INFO L225 Difference]: With dead ends: 202 [2020-09-11 12:05:02,635 INFO L226 Difference]: Without dead ends: 200 [2020-09-11 12:05:02,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-11 12:05:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-09-11 12:05:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-09-11 12:05:02,639 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-09-11 12:05:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:02,639 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-09-11 12:05:02,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-09-11 12:05:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:02,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:02,640 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:02,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 12:05:02,841 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:02,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-09-11 12:05:02,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:02,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226726457] [2020-09-11 12:05:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:02,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226726457] [2020-09-11 12:05:02,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396164538] [2020-09-11 12:05:02,950 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 [2020-09-11 12:05:03,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:03,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:03,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:03,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900634546] [2020-09-11 12:05:03,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:03,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:03,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:03,179 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:03,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:03,584 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-09-11 12:05:03,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:05:03,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:03,586 INFO L225 Difference]: With dead ends: 201 [2020-09-11 12:05:03,586 INFO L226 Difference]: Without dead ends: 199 [2020-09-11 12:05:03,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-09-11 12:05:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-09-11 12:05:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-11 12:05:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-09-11 12:05:03,591 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-09-11 12:05:03,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:03,591 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-09-11 12:05:03,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-09-11 12:05:03,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:03,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:03,592 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:03,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 12:05:03,794 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:03,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:03,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-09-11 12:05:03,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:03,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089091588] [2020-09-11 12:05:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:03,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089091588] [2020-09-11 12:05:03,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277533441] [2020-09-11 12:05:03,910 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 [2020-09-11 12:05:03,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:03,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:03,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:04,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:04,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:04,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068483498] [2020-09-11 12:05:04,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:04,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:04,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:04,133 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-09-11 12:05:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:04,693 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-09-11 12:05:04,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:05:04,694 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:04,695 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:04,695 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:04,696 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 [2020-09-11 12:05:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:04,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-09-11 12:05:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:04,699 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:04,699 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:04,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:04,700 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:04,701 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:04,701 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:04,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:04,905 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-09-11 12:05:04,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:04,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695966026] [2020-09-11 12:05:04,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695966026] [2020-09-11 12:05:05,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843882020] [2020-09-11 12:05:05,022 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 [2020-09-11 12:05:05,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:05,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:05,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:05,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:05,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:05,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:05,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835190155] [2020-09-11 12:05:05,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:05,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:05,235 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:05,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:05,706 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-09-11 12:05:05,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:05:05,707 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:05,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:05,709 INFO L225 Difference]: With dead ends: 196 [2020-09-11 12:05:05,709 INFO L226 Difference]: Without dead ends: 194 [2020-09-11 12:05:05,709 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 [2020-09-11 12:05:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-09-11 12:05:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-09-11 12:05:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:05,713 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:05,713 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:05,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:05,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:05,714 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:05,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:05,916 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-09-11 12:05:05,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:05,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155710572] [2020-09-11 12:05:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155710572] [2020-09-11 12:05:06,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633812819] [2020-09-11 12:05:06,022 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 [2020-09-11 12:05:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:06,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:06,193 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:06,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:06,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410800491] [2020-09-11 12:05:06,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:06,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:06,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:06,206 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:06,611 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-09-11 12:05:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:06,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:06,613 INFO L225 Difference]: With dead ends: 191 [2020-09-11 12:05:06,614 INFO L226 Difference]: Without dead ends: 186 [2020-09-11 12:05:06,614 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 [2020-09-11 12:05:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-09-11 12:05:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-09-11 12:05:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:06,620 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:06,620 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:06,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:06,621 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:06,622 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:06,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 12:05:06,822 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:06,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:06,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-09-11 12:05:06,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:06,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159228104] [2020-09-11 12:05:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159228104] [2020-09-11 12:05:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024355537] [2020-09-11 12:05:06,960 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 [2020-09-11 12:05:07,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:07,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:07,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:07,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:07,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:07,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:07,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290977719] [2020-09-11 12:05:07,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:07,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:07,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:07,213 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:07,873 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-09-11 12:05:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:07,881 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:07,882 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:07,882 INFO L226 Difference]: Without dead ends: 227 [2020-09-11 12:05:07,882 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 [2020-09-11 12:05:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-11 12:05:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-09-11 12:05:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-11 12:05:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-09-11 12:05:07,885 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-09-11 12:05:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:07,886 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-09-11 12:05:07,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-09-11 12:05:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:07,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:07,887 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:08,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:08,095 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:08,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-09-11 12:05:08,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:08,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526438771] [2020-09-11 12:05:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526438771] [2020-09-11 12:05:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104398026] [2020-09-11 12:05:08,234 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 [2020-09-11 12:05:08,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:08,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:08,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:08,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063427195] [2020-09-11 12:05:08,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:08,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:08,523 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-09-11 12:05:09,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:09,223 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-09-11 12:05:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:05:09,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:09,226 INFO L225 Difference]: With dead ends: 222 [2020-09-11 12:05:09,226 INFO L226 Difference]: Without dead ends: 220 [2020-09-11 12:05:09,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:05:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-11 12:05:09,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-09-11 12:05:09,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-11 12:05:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-09-11 12:05:09,232 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-09-11 12:05:09,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:09,232 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-09-11 12:05:09,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:09,232 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-09-11 12:05:09,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:09,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:09,233 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:09,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:09,447 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:09,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-09-11 12:05:09,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:09,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302029089] [2020-09-11 12:05:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:09,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302029089] [2020-09-11 12:05:09,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644448647] [2020-09-11 12:05:09,588 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 [2020-09-11 12:05:09,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:09,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:09,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:09,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:09,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:09,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:09,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528271654] [2020-09-11 12:05:09,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:09,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:09,905 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-09-11 12:05:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:10,807 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-09-11 12:05:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:10,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:10,809 INFO L225 Difference]: With dead ends: 254 [2020-09-11 12:05:10,809 INFO L226 Difference]: Without dead ends: 246 [2020-09-11 12:05:10,810 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 [2020-09-11 12:05:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-09-11 12:05:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-09-11 12:05:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-09-11 12:05:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-09-11 12:05:10,813 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-09-11 12:05:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:10,814 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-09-11 12:05:10,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-09-11 12:05:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:10,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:10,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:11,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:11,026 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:11,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-09-11 12:05:11,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:11,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956328200] [2020-09-11 12:05:11,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956328200] [2020-09-11 12:05:11,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823172537] [2020-09-11 12:05:11,147 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 [2020-09-11 12:05:11,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:11,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:11,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:11,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:11,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:11,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086711048] [2020-09-11 12:05:11,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:11,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:11,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:11,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:11,370 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-09-11 12:05:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:12,266 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-09-11 12:05:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:12,267 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:12,268 INFO L225 Difference]: With dead ends: 246 [2020-09-11 12:05:12,268 INFO L226 Difference]: Without dead ends: 238 [2020-09-11 12:05:12,269 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 [2020-09-11 12:05:12,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-11 12:05:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-09-11 12:05:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-09-11 12:05:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-09-11 12:05:12,272 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-09-11 12:05:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:12,272 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-09-11 12:05:12,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:12,273 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-09-11 12:05:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:12,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:12,273 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:12,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-09-11 12:05:12,483 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-09-11 12:05:12,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:12,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541579387] [2020-09-11 12:05:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:12,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541579387] [2020-09-11 12:05:12,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178610559] [2020-09-11 12:05:12,594 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 [2020-09-11 12:05:12,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:12,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:12,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:12,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916454765] [2020-09-11 12:05:12,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:12,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:12,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:12,807 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-09-11 12:05:13,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:13,313 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-09-11 12:05:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:05:13,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:13,315 INFO L225 Difference]: With dead ends: 208 [2020-09-11 12:05:13,315 INFO L226 Difference]: Without dead ends: 206 [2020-09-11 12:05:13,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:05:13,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-11 12:05:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-09-11 12:05:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-09-11 12:05:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-09-11 12:05:13,318 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-09-11 12:05:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:13,318 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-09-11 12:05:13,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-09-11 12:05:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:13,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:13,319 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:13,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 12:05:13,522 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:13,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-09-11 12:05:13,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:13,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883221473] [2020-09-11 12:05:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:13,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883221473] [2020-09-11 12:05:13,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418454358] [2020-09-11 12:05:13,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-11 12:05:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:13,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:13,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:13,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:13,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:13,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147272008] [2020-09-11 12:05:13,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:13,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:13,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:13,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:13,841 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-09-11 12:05:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:14,477 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-09-11 12:05:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:05:14,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:14,479 INFO L225 Difference]: With dead ends: 215 [2020-09-11 12:05:14,479 INFO L226 Difference]: Without dead ends: 213 [2020-09-11 12:05:14,479 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 [2020-09-11 12:05:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-09-11 12:05:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-09-11 12:05:14,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:14,482 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:14,483 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:14,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:14,483 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:14,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:14,483 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:14,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-09-11 12:05:14,684 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:14,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-09-11 12:05:14,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:14,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024376584] [2020-09-11 12:05:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024376584] [2020-09-11 12:05:14,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474160213] [2020-09-11 12:05:14,801 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 [2020-09-11 12:05:14,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:14,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:14,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:14,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:14,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:14,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:14,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:14,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969667178] [2020-09-11 12:05:14,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:14,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:14,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:14,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:14,986 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:15,689 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-09-11 12:05:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:15,690 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:15,691 INFO L225 Difference]: With dead ends: 236 [2020-09-11 12:05:15,691 INFO L226 Difference]: Without dead ends: 228 [2020-09-11 12:05:15,691 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 [2020-09-11 12:05:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-09-11 12:05:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-09-11 12:05:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-11 12:05:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-09-11 12:05:15,694 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-09-11 12:05:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:15,694 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-09-11 12:05:15,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-09-11 12:05:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:15,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:15,695 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 12:05:15,896 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-09-11 12:05:15,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:15,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261069933] [2020-09-11 12:05:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261069933] [2020-09-11 12:05:16,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012030771] [2020-09-11 12:05:16,006 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 [2020-09-11 12:05:16,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:16,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:16,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:16,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:05:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:16,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:16,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:16,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565131597] [2020-09-11 12:05:16,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:16,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:16,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:16,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:16,199 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-09-11 12:05:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:16,981 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-09-11 12:05:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:05:16,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:16,984 INFO L225 Difference]: With dead ends: 241 [2020-09-11 12:05:16,984 INFO L226 Difference]: Without dead ends: 233 [2020-09-11 12:05:16,984 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 [2020-09-11 12:05:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-11 12:05:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-09-11 12:05:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-09-11 12:05:16,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-09-11 12:05:16,988 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-09-11 12:05:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:16,988 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-09-11 12:05:16,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-09-11 12:05:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:16,989 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:16,989 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:17,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 12:05:17,199 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-09-11 12:05:17,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:17,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91088465] [2020-09-11 12:05:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91088465] [2020-09-11 12:05:17,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865546661] [2020-09-11 12:05:17,317 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 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 [2020-09-11 12:05:17,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:17,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:05:17,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:17,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:05:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:17,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:17,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-09-11 12:05:17,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657736724] [2020-09-11 12:05:17,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:05:17,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:17,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:05:17,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:05:17,516 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-09-11 12:05:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:18,260 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-09-11 12:05:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:05:18,261 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-09-11 12:05:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:18,262 INFO L225 Difference]: With dead ends: 232 [2020-09-11 12:05:18,262 INFO L226 Difference]: Without dead ends: 224 [2020-09-11 12:05:18,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:05:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-09-11 12:05:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-09-11 12:05:18,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-09-11 12:05:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-09-11 12:05:18,266 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-09-11 12:05:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:18,267 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-09-11 12:05:18,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:05:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-09-11 12:05:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:18,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:18,267 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:18,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:18,468 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-09-11 12:05:18,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:18,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674677272] [2020-09-11 12:05:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674677272] [2020-09-11 12:05:18,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807461512] [2020-09-11 12:05:18,623 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 [2020-09-11 12:05:18,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:05:18,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:05:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:18,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 12:05:18,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-09-11 12:05:18,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855872194] [2020-09-11 12:05:18,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:05:18,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:18,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:05:18,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:05:18,787 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-09-11 12:05:18,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:18,821 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-09-11 12:05:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:05:18,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-11 12:05:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:18,823 INFO L225 Difference]: With dead ends: 195 [2020-09-11 12:05:18,823 INFO L226 Difference]: Without dead ends: 188 [2020-09-11 12:05:18,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:05:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-09-11 12:05:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-09-11 12:05:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-11 12:05:18,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-09-11 12:05:18,827 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-09-11 12:05:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:18,827 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-09-11 12:05:18,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:05:18,827 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-09-11 12:05:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:18,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:18,828 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:19,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-09-11 12:05:19,038 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-09-11 12:05:19,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:19,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260603182] [2020-09-11 12:05:19,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260603182] [2020-09-11 12:05:19,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116473018] [2020-09-11 12:05:19,260 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 [2020-09-11 12:05:19,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:19,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:19,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:19,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:19,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502961994] [2020-09-11 12:05:19,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:19,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:19,540 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 17 states. [2020-09-11 12:05:19,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:19,626 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2020-09-11 12:05:19,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:19,628 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-09-11 12:05:19,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:19,629 INFO L225 Difference]: With dead ends: 249 [2020-09-11 12:05:19,629 INFO L226 Difference]: Without dead ends: 241 [2020-09-11 12:05:19,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:19,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-11 12:05:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 197. [2020-09-11 12:05:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-11 12:05:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 521 transitions. [2020-09-11 12:05:19,633 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 521 transitions. Word has length 13 [2020-09-11 12:05:19,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:19,633 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 521 transitions. [2020-09-11 12:05:19,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:19,633 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 521 transitions. [2020-09-11 12:05:19,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:05:19,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:19,634 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:19,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 12:05:19,834 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1413108102, now seen corresponding path program 22 times [2020-09-11 12:05:19,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:19,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841479971] [2020-09-11 12:05:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841479971] [2020-09-11 12:05:20,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102256328] [2020-09-11 12:05:20,027 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 [2020-09-11 12:05:20,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:05:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-11 12:05:20,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 16 [2020-09-11 12:05:20,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751960122] [2020-09-11 12:05:20,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:05:20,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:20,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:05:20,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:05:20,201 INFO L87 Difference]: Start difference. First operand 197 states and 521 transitions. Second operand 8 states. [2020-09-11 12:05:20,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:20,229 INFO L93 Difference]: Finished difference Result 278 states and 705 transitions. [2020-09-11 12:05:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:05:20,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-09-11 12:05:20,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:20,231 INFO L225 Difference]: With dead ends: 278 [2020-09-11 12:05:20,231 INFO L226 Difference]: Without dead ends: 248 [2020-09-11 12:05:20,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:05:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-09-11 12:05:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-09-11 12:05:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-11 12:05:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-09-11 12:05:20,236 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-09-11 12:05:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:20,236 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-09-11 12:05:20,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:05:20,236 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-09-11 12:05:20,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:20,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:20,237 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:20,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:20,444 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-09-11 12:05:20,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:20,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618505157] [2020-09-11 12:05:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618505157] [2020-09-11 12:05:20,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395143471] [2020-09-11 12:05:20,605 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 [2020-09-11 12:05:20,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:20,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:20,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:20,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:20,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:20,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:20,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843458871] [2020-09-11 12:05:20,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:20,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:20,880 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-09-11 12:05:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:20,958 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-09-11 12:05:20,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:20,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:20,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:20,960 INFO L225 Difference]: With dead ends: 275 [2020-09-11 12:05:20,960 INFO L226 Difference]: Without dead ends: 273 [2020-09-11 12:05:20,960 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 [2020-09-11 12:05:20,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-09-11 12:05:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-09-11 12:05:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-09-11 12:05:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-09-11 12:05:20,965 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-09-11 12:05:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:20,965 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-09-11 12:05:20,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-09-11 12:05:20,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:20,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:20,966 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:21,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:21,166 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:21,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-09-11 12:05:21,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:21,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367313770] [2020-09-11 12:05:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367313770] [2020-09-11 12:05:21,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722297127] [2020-09-11 12:05:21,311 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 [2020-09-11 12:05:21,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:21,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:21,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:21,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:21,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218680595] [2020-09-11 12:05:21,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:21,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:21,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:21,642 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-09-11 12:05:21,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:21,972 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-09-11 12:05:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:21,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:21,975 INFO L225 Difference]: With dead ends: 295 [2020-09-11 12:05:21,975 INFO L226 Difference]: Without dead ends: 292 [2020-09-11 12:05:21,976 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 [2020-09-11 12:05:21,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-11 12:05:21,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-09-11 12:05:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-09-11 12:05:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-09-11 12:05:21,983 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-09-11 12:05:21,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:21,983 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-09-11 12:05:21,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-09-11 12:05:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:21,984 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:21,984 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:22,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:22,199 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:22,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:22,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-09-11 12:05:22,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:22,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624909713] [2020-09-11 12:05:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:22,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624909713] [2020-09-11 12:05:22,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622510437] [2020-09-11 12:05:22,366 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 [2020-09-11 12:05:22,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:22,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:22,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:22,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:22,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920124829] [2020-09-11 12:05:22,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:22,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:22,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:22,744 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-09-11 12:05:23,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:23,099 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-09-11 12:05:23,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:05:23,100 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:23,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:23,102 INFO L225 Difference]: With dead ends: 320 [2020-09-11 12:05:23,102 INFO L226 Difference]: Without dead ends: 316 [2020-09-11 12:05:23,102 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 [2020-09-11 12:05:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-09-11 12:05:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-09-11 12:05:23,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-09-11 12:05:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-09-11 12:05:23,106 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-09-11 12:05:23,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:23,106 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-09-11 12:05:23,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-09-11 12:05:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:23,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:23,107 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:23,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:23,308 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-09-11 12:05:23,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:23,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983521003] [2020-09-11 12:05:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:23,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:23,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983521003] [2020-09-11 12:05:23,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295490071] [2020-09-11 12:05:23,445 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 [2020-09-11 12:05:23,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:23,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:23,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:25,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:25,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:25,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944715380] [2020-09-11 12:05:25,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:25,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:25,129 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-09-11 12:05:25,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:25,525 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-09-11 12:05:25,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:25,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:25,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:25,527 INFO L225 Difference]: With dead ends: 316 [2020-09-11 12:05:25,527 INFO L226 Difference]: Without dead ends: 313 [2020-09-11 12:05:25,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:25,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-11 12:05:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-09-11 12:05:25,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-09-11 12:05:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-09-11 12:05:25,533 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-09-11 12:05:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:25,533 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-09-11 12:05:25,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-09-11 12:05:25,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:25,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:25,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:25,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-09-11 12:05:25,736 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:25,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-09-11 12:05:25,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:25,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484838369] [2020-09-11 12:05:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:25,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484838369] [2020-09-11 12:05:25,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144775902] [2020-09-11 12:05:25,882 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 [2020-09-11 12:05:25,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:05:25,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:25,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:29,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:29,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:29,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157416790] [2020-09-11 12:05:29,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:29,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:29,615 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-09-11 12:05:33,860 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:05:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:34,153 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-09-11 12:05:34,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:34,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:34,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:34,155 INFO L225 Difference]: With dead ends: 342 [2020-09-11 12:05:34,155 INFO L226 Difference]: Without dead ends: 337 [2020-09-11 12:05:34,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-09-11 12:05:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-09-11 12:05:34,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-09-11 12:05:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-11 12:05:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-09-11 12:05:34,159 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-09-11 12:05:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:34,159 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-09-11 12:05:34,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:34,160 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-09-11 12:05:34,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:34,160 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:34,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:34,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 12:05:34,361 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:34,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-09-11 12:05:34,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:34,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597208989] [2020-09-11 12:05:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:34,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597208989] [2020-09-11 12:05:34,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836412590] [2020-09-11 12:05:34,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:34,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:34,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:34,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:34,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:34,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909471880] [2020-09-11 12:05:34,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:34,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:34,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:34,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:34,913 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-09-11 12:05:35,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:35,500 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-09-11 12:05:35,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:35,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:35,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:35,502 INFO L225 Difference]: With dead ends: 331 [2020-09-11 12:05:35,503 INFO L226 Difference]: Without dead ends: 327 [2020-09-11 12:05:35,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:35,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-09-11 12:05:35,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-09-11 12:05:35,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-11 12:05:35,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-09-11 12:05:35,511 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-09-11 12:05:35,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:35,511 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-09-11 12:05:35,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-09-11 12:05:35,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:35,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:35,513 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:35,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 12:05:35,726 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:35,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-09-11 12:05:35,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:35,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762970670] [2020-09-11 12:05:35,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:35,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:35,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762970670] [2020-09-11 12:05:35,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634612410] [2020-09-11 12:05:35,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:35,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:35,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:35,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:35,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:36,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:36,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:36,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467865861] [2020-09-11 12:05:36,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:36,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:36,141 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-09-11 12:05:36,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:36,564 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-09-11 12:05:36,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:05:36,565 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:36,566 INFO L225 Difference]: With dead ends: 321 [2020-09-11 12:05:36,566 INFO L226 Difference]: Without dead ends: 318 [2020-09-11 12:05:36,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-09-11 12:05:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-09-11 12:05:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-11 12:05:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-09-11 12:05:36,571 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-09-11 12:05:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:36,571 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-09-11 12:05:36,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-09-11 12:05:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:36,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:36,571 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:36,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 12:05:36,772 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:36,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-09-11 12:05:36,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:36,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432621198] [2020-09-11 12:05:36,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:36,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432621198] [2020-09-11 12:05:36,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599254354] [2020-09-11 12:05:36,930 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 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 [2020-09-11 12:05:36,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:05:36,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:36,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:36,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:37,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:37,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:37,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917695922] [2020-09-11 12:05:37,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:37,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:37,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:37,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:37,200 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-09-11 12:05:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:37,666 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-09-11 12:05:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:37,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:37,667 INFO L225 Difference]: With dead ends: 348 [2020-09-11 12:05:37,667 INFO L226 Difference]: Without dead ends: 343 [2020-09-11 12:05:37,668 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 [2020-09-11 12:05:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-09-11 12:05:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-09-11 12:05:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-11 12:05:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-09-11 12:05:37,671 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-09-11 12:05:37,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:37,671 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-09-11 12:05:37,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-09-11 12:05:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:37,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:37,672 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:37,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 12:05:37,873 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:37,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-09-11 12:05:37,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:37,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531248140] [2020-09-11 12:05:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:37,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531248140] [2020-09-11 12:05:38,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008485884] [2020-09-11 12:05:38,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:38,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:38,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:38,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540294595] [2020-09-11 12:05:38,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:38,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:38,276 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-09-11 12:05:38,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:38,684 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-09-11 12:05:38,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:38,685 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:38,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:38,686 INFO L225 Difference]: With dead ends: 349 [2020-09-11 12:05:38,686 INFO L226 Difference]: Without dead ends: 344 [2020-09-11 12:05:38,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-09-11 12:05:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-09-11 12:05:38,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-09-11 12:05:38,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-09-11 12:05:38,691 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-09-11 12:05:38,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:38,691 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-09-11 12:05:38,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:38,691 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-09-11 12:05:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:38,692 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:38,692 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:38,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-09-11 12:05:38,893 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-09-11 12:05:38,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:38,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459107711] [2020-09-11 12:05:38,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:39,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459107711] [2020-09-11 12:05:39,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623282420] [2020-09-11 12:05:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:39,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:39,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:39,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:39,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:39,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:39,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:39,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178327647] [2020-09-11 12:05:39,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:39,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:39,299 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-09-11 12:05:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:39,653 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-09-11 12:05:39,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:39,655 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:39,656 INFO L225 Difference]: With dead ends: 332 [2020-09-11 12:05:39,656 INFO L226 Difference]: Without dead ends: 314 [2020-09-11 12:05:39,656 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 [2020-09-11 12:05:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-09-11 12:05:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-09-11 12:05:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-09-11 12:05:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-09-11 12:05:39,660 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-09-11 12:05:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:39,660 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-09-11 12:05:39,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-09-11 12:05:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:39,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:39,661 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:39,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:39,862 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-09-11 12:05:39,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:39,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845832683] [2020-09-11 12:05:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845832683] [2020-09-11 12:05:40,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285158908] [2020-09-11 12:05:40,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:40,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:05:40,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:40,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:40,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:40,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645288908] [2020-09-11 12:05:40,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:40,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:40,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:40,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:40,301 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-09-11 12:05:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:40,615 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-09-11 12:05:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:40,616 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:40,617 INFO L225 Difference]: With dead ends: 315 [2020-09-11 12:05:40,617 INFO L226 Difference]: Without dead ends: 312 [2020-09-11 12:05:40,617 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 [2020-09-11 12:05:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-09-11 12:05:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-09-11 12:05:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-09-11 12:05:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-09-11 12:05:40,621 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-09-11 12:05:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:40,621 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-09-11 12:05:40,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-09-11 12:05:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:40,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:40,622 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:40,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:40,823 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-09-11 12:05:40,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:40,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778615146] [2020-09-11 12:05:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:40,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778615146] [2020-09-11 12:05:40,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254490186] [2020-09-11 12:05:40,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:41,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:41,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:41,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:41,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930586623] [2020-09-11 12:05:41,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:41,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:41,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:41,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:41,280 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-09-11 12:05:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:41,662 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-09-11 12:05:41,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:05:41,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:41,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:41,664 INFO L225 Difference]: With dead ends: 334 [2020-09-11 12:05:41,664 INFO L226 Difference]: Without dead ends: 330 [2020-09-11 12:05:41,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-09-11 12:05:41,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-09-11 12:05:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-11 12:05:41,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-09-11 12:05:41,669 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-09-11 12:05:41,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:41,670 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-09-11 12:05:41,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:41,670 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-09-11 12:05:41,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:41,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:41,670 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:41,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:41,871 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:41,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-09-11 12:05:41,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:41,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399039482] [2020-09-11 12:05:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:42,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399039482] [2020-09-11 12:05:42,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542440637] [2020-09-11 12:05:42,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:42,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:42,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:42,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:43,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:43,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:43,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270410160] [2020-09-11 12:05:43,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:43,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:43,047 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-09-11 12:05:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:43,537 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-09-11 12:05:43,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:43,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:43,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:43,539 INFO L225 Difference]: With dead ends: 351 [2020-09-11 12:05:43,539 INFO L226 Difference]: Without dead ends: 346 [2020-09-11 12:05:43,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-09-11 12:05:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-09-11 12:05:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-09-11 12:05:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-09-11 12:05:43,544 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-09-11 12:05:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:43,544 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-09-11 12:05:43,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-09-11 12:05:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:43,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:43,545 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:43,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:43,748 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:43,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-09-11 12:05:43,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:43,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441345204] [2020-09-11 12:05:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:43,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441345204] [2020-09-11 12:05:43,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173452325] [2020-09-11 12:05:43,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:43,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:43,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:43,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:44,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:44,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:44,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454608346] [2020-09-11 12:05:44,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:44,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:44,171 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-09-11 12:05:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:44,578 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-09-11 12:05:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:44,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:44,580 INFO L225 Difference]: With dead ends: 357 [2020-09-11 12:05:44,580 INFO L226 Difference]: Without dead ends: 339 [2020-09-11 12:05:44,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:05:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-09-11 12:05:44,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-09-11 12:05:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-09-11 12:05:44,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-09-11 12:05:44,585 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-09-11 12:05:44,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:44,585 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-09-11 12:05:44,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:44,585 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-09-11 12:05:44,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:44,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:44,586 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:44,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:44,787 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:44,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:44,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-09-11 12:05:44,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:44,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538863347] [2020-09-11 12:05:44,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:44,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538863347] [2020-09-11 12:05:44,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836478215] [2020-09-11 12:05:44,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:45,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:45,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:45,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:45,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:45,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906747909] [2020-09-11 12:05:45,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:45,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:45,245 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-09-11 12:05:45,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:45,608 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-09-11 12:05:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:05:45,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:45,610 INFO L225 Difference]: With dead ends: 332 [2020-09-11 12:05:45,610 INFO L226 Difference]: Without dead ends: 327 [2020-09-11 12:05:45,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:05:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-09-11 12:05:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-09-11 12:05:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-11 12:05:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-09-11 12:05:45,615 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-09-11 12:05:45,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:45,615 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-09-11 12:05:45,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:45,615 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-09-11 12:05:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:45,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:45,616 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:45,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 12:05:45,817 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-09-11 12:05:45,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:45,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294118163] [2020-09-11 12:05:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294118163] [2020-09-11 12:05:46,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290541958] [2020-09-11 12:05:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:46,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:05:46,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:46,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:46,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:46,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:46,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275123170] [2020-09-11 12:05:46,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:46,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:46,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:46,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:46,306 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-09-11 12:05:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:46,540 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-09-11 12:05:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:05:46,541 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:46,542 INFO L225 Difference]: With dead ends: 322 [2020-09-11 12:05:46,542 INFO L226 Difference]: Without dead ends: 309 [2020-09-11 12:05:46,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:05:46,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-09-11 12:05:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-09-11 12:05:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-09-11 12:05:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-09-11 12:05:46,546 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-09-11 12:05:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:46,547 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-09-11 12:05:46,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-09-11 12:05:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:46,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:46,547 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:46,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 12:05:46,748 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:46,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:46,749 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-09-11 12:05:46,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:46,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999666927] [2020-09-11 12:05:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:46,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999666927] [2020-09-11 12:05:46,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272725633] [2020-09-11 12:05:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:05:47,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:47,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:47,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:47,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331443262] [2020-09-11 12:05:47,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:47,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:47,255 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-09-11 12:05:47,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:47,359 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-09-11 12:05:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:05:47,360 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:47,361 INFO L225 Difference]: With dead ends: 305 [2020-09-11 12:05:47,361 INFO L226 Difference]: Without dead ends: 303 [2020-09-11 12:05:47,361 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 [2020-09-11 12:05:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-09-11 12:05:47,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-09-11 12:05:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-09-11 12:05:47,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-09-11 12:05:47,366 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-09-11 12:05:47,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:47,366 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-09-11 12:05:47,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:47,366 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-09-11 12:05:47,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:47,367 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:47,367 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:47,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 12:05:47,575 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:47,576 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-09-11 12:05:47,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:47,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658746646] [2020-09-11 12:05:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:47,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658746646] [2020-09-11 12:05:47,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205698256] [2020-09-11 12:05:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:47,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:05:47,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:47,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:47,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:48,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:48,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332971086] [2020-09-11 12:05:48,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:48,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:48,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:48,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:48,073 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-09-11 12:05:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:48,400 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-09-11 12:05:48,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:48,401 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:48,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:48,402 INFO L225 Difference]: With dead ends: 325 [2020-09-11 12:05:48,402 INFO L226 Difference]: Without dead ends: 322 [2020-09-11 12:05:48,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:05:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-11 12:05:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-09-11 12:05:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-11 12:05:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-09-11 12:05:48,407 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-09-11 12:05:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-09-11 12:05:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-09-11 12:05:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:48,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:48,408 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:48,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 12:05:48,608 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:48,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:48,609 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-09-11 12:05:48,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:48,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275531662] [2020-09-11 12:05:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:48,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275531662] [2020-09-11 12:05:48,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480925715] [2020-09-11 12:05:48,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:48,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:05:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:49,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:49,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:49,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685114792] [2020-09-11 12:05:49,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:49,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:49,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:49,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:49,155 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-09-11 12:05:49,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:49,567 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-09-11 12:05:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:05:49,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:49,569 INFO L225 Difference]: With dead ends: 348 [2020-09-11 12:05:49,569 INFO L226 Difference]: Without dead ends: 344 [2020-09-11 12:05:49,570 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 [2020-09-11 12:05:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-09-11 12:05:49,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-09-11 12:05:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-11 12:05:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-09-11 12:05:49,574 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-09-11 12:05:49,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:49,574 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-09-11 12:05:49,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:49,574 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-09-11 12:05:49,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:49,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:49,575 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:49,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:49,776 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:49,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-09-11 12:05:49,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:49,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577993555] [2020-09-11 12:05:49,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577993555] [2020-09-11 12:05:49,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299811184] [2020-09-11 12:05:49,968 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 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 [2020-09-11 12:05:50,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:05:50,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:05:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:51,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:51,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:51,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056299223] [2020-09-11 12:05:51,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:51,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:05:51,713 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-09-11 12:05:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:05:52,239 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-09-11 12:05:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:05:52,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:05:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:05:52,241 INFO L225 Difference]: With dead ends: 338 [2020-09-11 12:05:52,241 INFO L226 Difference]: Without dead ends: 335 [2020-09-11 12:05:52,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-09-11 12:05:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-11 12:05:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-09-11 12:05:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-11 12:05:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-09-11 12:05:52,246 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-09-11 12:05:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:05:52,246 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-09-11 12:05:52,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:05:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-09-11 12:05:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:05:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:05:52,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:05:52,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:52,458 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:05:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:05:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-09-11 12:05:52,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:05:52,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672442925] [2020-09-11 12:05:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:05:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:52,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672442925] [2020-09-11 12:05:52,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533726417] [2020-09-11 12:05:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:05:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:05:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:05:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:05:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:05:57,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:05:57,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:05:57,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744355223] [2020-09-11 12:05:57,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:05:57,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:05:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:05:57,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-09-11 12:05:57,214 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-09-11 12:06:01,487 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-09-11 12:06:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:01,873 INFO L93 Difference]: Finished difference Result 369 states and 902 transitions. [2020-09-11 12:06:01,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:01,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:01,875 INFO L225 Difference]: With dead ends: 369 [2020-09-11 12:06:01,876 INFO L226 Difference]: Without dead ends: 364 [2020-09-11 12:06:01,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-09-11 12:06:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-09-11 12:06:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 272. [2020-09-11 12:06:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-11 12:06:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-09-11 12:06:01,881 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-09-11 12:06:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:01,881 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-09-11 12:06:01,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-09-11 12:06:01,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:01,882 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:01,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:02,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-09-11 12:06:02,092 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:02,092 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-09-11 12:06:02,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:02,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890925748] [2020-09-11 12:06:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:02,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890925748] [2020-09-11 12:06:02,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248526732] [2020-09-11 12:06:02,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:02,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:02,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:02,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:02,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:02,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:02,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:02,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:02,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064122085] [2020-09-11 12:06:02,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:02,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:02,596 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-09-11 12:06:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:03,142 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-09-11 12:06:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:03,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:03,144 INFO L225 Difference]: With dead ends: 352 [2020-09-11 12:06:03,144 INFO L226 Difference]: Without dead ends: 348 [2020-09-11 12:06:03,145 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 [2020-09-11 12:06:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-09-11 12:06:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-09-11 12:06:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-09-11 12:06:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-09-11 12:06:03,150 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-09-11 12:06:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:03,150 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-09-11 12:06:03,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:03,151 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-09-11 12:06:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:03,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:03,151 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:03,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:03,352 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-09-11 12:06:03,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:03,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675931944] [2020-09-11 12:06:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:03,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675931944] [2020-09-11 12:06:03,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335748612] [2020-09-11 12:06:03,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:03,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:03,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:03,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:03,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:03,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:03,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:03,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713464727] [2020-09-11 12:06:03,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:03,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:03,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:03,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:03,793 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-09-11 12:06:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:04,347 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-09-11 12:06:04,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:04,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:04,349 INFO L225 Difference]: With dead ends: 330 [2020-09-11 12:06:04,349 INFO L226 Difference]: Without dead ends: 327 [2020-09-11 12:06:04,350 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 [2020-09-11 12:06:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-09-11 12:06:04,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-09-11 12:06:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-11 12:06:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-09-11 12:06:04,354 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-09-11 12:06:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:04,354 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-09-11 12:06:04,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-09-11 12:06:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:04,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:04,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:04,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:04,555 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-09-11 12:06:04,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:04,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319587177] [2020-09-11 12:06:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:04,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:04,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319587177] [2020-09-11 12:06:04,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638904003] [2020-09-11 12:06:04,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:04,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:04,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:04,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:04,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:04,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:04,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:04,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548556994] [2020-09-11 12:06:04,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:04,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:04,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:04,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:04,991 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-09-11 12:06:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:05,580 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-09-11 12:06:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:06:05,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:05,583 INFO L225 Difference]: With dead ends: 365 [2020-09-11 12:06:05,583 INFO L226 Difference]: Without dead ends: 360 [2020-09-11 12:06:05,583 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 [2020-09-11 12:06:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-09-11 12:06:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-09-11 12:06:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-11 12:06:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-09-11 12:06:05,588 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-09-11 12:06:05,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:05,588 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-09-11 12:06:05,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:05,588 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-09-11 12:06:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:05,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:05,588 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:05,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:05,789 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:05,790 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-09-11 12:06:05,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:05,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388826550] [2020-09-11 12:06:05,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:05,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388826550] [2020-09-11 12:06:05,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868793346] [2020-09-11 12:06:05,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:05,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:05,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:05,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:05,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:06,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:06,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:06,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741157067] [2020-09-11 12:06:06,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:06,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:06,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:06,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:06,184 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-09-11 12:06:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:06,674 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-09-11 12:06:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:06,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:06,676 INFO L225 Difference]: With dead ends: 363 [2020-09-11 12:06:06,676 INFO L226 Difference]: Without dead ends: 358 [2020-09-11 12:06:06,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:06:06,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-09-11 12:06:06,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-09-11 12:06:06,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-09-11 12:06:06,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-09-11 12:06:06,681 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-09-11 12:06:06,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:06,681 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-09-11 12:06:06,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:06,681 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-09-11 12:06:06,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:06,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:06,682 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:06,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-09-11 12:06:06,890 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:06,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:06,893 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-09-11 12:06:06,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:06,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430044181] [2020-09-11 12:06:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:07,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430044181] [2020-09-11 12:06:07,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997139101] [2020-09-11 12:06:07,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:07,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:07,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:07,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:07,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:07,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:07,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:07,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350839136] [2020-09-11 12:06:07,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:07,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:07,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:07,328 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-09-11 12:06:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:07,714 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-09-11 12:06:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:06:07,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:07,716 INFO L225 Difference]: With dead ends: 333 [2020-09-11 12:06:07,716 INFO L226 Difference]: Without dead ends: 315 [2020-09-11 12:06:07,717 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 [2020-09-11 12:06:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-11 12:06:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-09-11 12:06:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-11 12:06:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-09-11 12:06:07,722 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-09-11 12:06:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:07,722 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-09-11 12:06:07,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-09-11 12:06:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:07,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:07,723 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:07,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 12:06:07,923 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:07,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-09-11 12:06:07,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:07,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072855636] [2020-09-11 12:06:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072855636] [2020-09-11 12:06:08,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572258360] [2020-09-11 12:06:08,150 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 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 [2020-09-11 12:06:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:08,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:08,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:08,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026655485] [2020-09-11 12:06:08,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:08,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:08,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:08,404 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-09-11 12:06:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:08,557 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-09-11 12:06:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:08,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:08,559 INFO L225 Difference]: With dead ends: 296 [2020-09-11 12:06:08,559 INFO L226 Difference]: Without dead ends: 294 [2020-09-11 12:06:08,559 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 [2020-09-11 12:06:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-09-11 12:06:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-09-11 12:06:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-11 12:06:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-09-11 12:06:08,564 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-09-11 12:06:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:08,564 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-09-11 12:06:08,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:08,565 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-09-11 12:06:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:08,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:08,565 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:08,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 12:06:08,766 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:08,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:08,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-09-11 12:06:08,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:08,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680252230] [2020-09-11 12:06:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680252230] [2020-09-11 12:06:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24827675] [2020-09-11 12:06:08,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:09,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:09,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:09,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:09,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:09,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:09,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:09,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347111342] [2020-09-11 12:06:09,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:09,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:09,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:09,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:09,231 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-09-11 12:06:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:09,617 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-09-11 12:06:09,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:09,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:09,619 INFO L225 Difference]: With dead ends: 328 [2020-09-11 12:06:09,619 INFO L226 Difference]: Without dead ends: 325 [2020-09-11 12:06:09,619 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 [2020-09-11 12:06:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-09-11 12:06:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-09-11 12:06:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-09-11 12:06:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-09-11 12:06:09,624 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-09-11 12:06:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:09,624 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-09-11 12:06:09,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:09,624 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-09-11 12:06:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:09,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:09,625 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:09,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 12:06:09,826 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:09,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:09,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-09-11 12:06:09,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:09,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804323023] [2020-09-11 12:06:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:10,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804323023] [2020-09-11 12:06:10,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267242031] [2020-09-11 12:06:10,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:10,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:10,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:10,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:10,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:10,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-09-11 12:06:10,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564529166] [2020-09-11 12:06:10,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:06:10,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:06:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:06:10,442 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-09-11 12:06:10,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:10,919 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-09-11 12:06:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:06:10,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-09-11 12:06:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:10,921 INFO L225 Difference]: With dead ends: 344 [2020-09-11 12:06:10,921 INFO L226 Difference]: Without dead ends: 340 [2020-09-11 12:06:10,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:06:10,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-11 12:06:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-09-11 12:06:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-09-11 12:06:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-09-11 12:06:10,931 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-09-11 12:06:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:10,932 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-09-11 12:06:10,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:06:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-09-11 12:06:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:10,933 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:10,933 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:11,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 12:06:11,144 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-09-11 12:06:11,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:11,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142080663] [2020-09-11 12:06:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:11,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:11,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142080663] [2020-09-11 12:06:11,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180082636] [2020-09-11 12:06:11,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:11,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:11,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:11,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:13,721 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-09-11 12:06:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:13,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:13,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-09-11 12:06:13,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932382086] [2020-09-11 12:06:13,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:06:13,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:13,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:06:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=231, Unknown=2, NotChecked=0, Total=306 [2020-09-11 12:06:13,723 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 18 states. [2020-09-11 12:06:18,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:18,788 INFO L93 Difference]: Finished difference Result 346 states and 835 transitions. [2020-09-11 12:06:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:06:18,790 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-09-11 12:06:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:18,791 INFO L225 Difference]: With dead ends: 346 [2020-09-11 12:06:18,791 INFO L226 Difference]: Without dead ends: 343 [2020-09-11 12:06:18,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=234, Invalid=520, Unknown=2, NotChecked=0, Total=756 [2020-09-11 12:06:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-09-11 12:06:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 268. [2020-09-11 12:06:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-09-11 12:06:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-09-11 12:06:18,796 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-09-11 12:06:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:18,796 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-09-11 12:06:18,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:06:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-09-11 12:06:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:18,797 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:18,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:18,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-09-11 12:06:18,998 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-09-11 12:06:18,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:18,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004909836] [2020-09-11 12:06:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:19,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004909836] [2020-09-11 12:06:19,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055545162] [2020-09-11 12:06:19,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:19,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:19,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-09-11 12:06:21,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:21,660 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 12:06:21,665 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 12:06:21,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:06:21 BasicIcfg [2020-09-11 12:06:21,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:06:21,667 INFO L168 Benchmark]: Toolchain (without parser) took 263941.13 ms. Allocated memory was 138.4 MB in the beginning and 245.4 MB in the end (delta: 107.0 MB). Free memory was 99.5 MB in the beginning and 110.2 MB in the end (delta: -10.7 MB). Peak memory consumption was 96.2 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,668 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:06:21,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 805.89 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 98.8 MB in the beginning and 159.9 MB in the end (delta: -61.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,668 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.34 ms. Allocated memory is still 200.3 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,669 INFO L168 Benchmark]: Boogie Preprocessor took 34.52 ms. Allocated memory is still 200.3 MB. Free memory was 157.9 MB in the beginning and 156.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,669 INFO L168 Benchmark]: RCFGBuilder took 495.93 ms. Allocated memory is still 200.3 MB. Free memory was 156.6 MB in the beginning and 135.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,670 INFO L168 Benchmark]: TraceAbstraction took 262536.41 ms. Allocated memory was 200.3 MB in the beginning and 245.4 MB in the end (delta: 45.1 MB). Free memory was 135.9 MB in the beginning and 110.2 MB in the end (delta: 25.7 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. [2020-09-11 12:06:21,672 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 805.89 ms. Allocated memory was 138.4 MB in the beginning and 200.3 MB in the end (delta: 61.9 MB). Free memory was 98.8 MB in the beginning and 159.9 MB in the end (delta: -61.1 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 56.34 ms. Allocated memory is still 200.3 MB. Free memory was 159.9 MB in the beginning and 157.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.52 ms. Allocated memory is still 200.3 MB. Free memory was 157.9 MB in the beginning and 156.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.93 ms. Allocated memory is still 200.3 MB. Free memory was 156.6 MB in the beginning and 135.9 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 262536.41 ms. Allocated memory was 200.3 MB in the beginning and 245.4 MB in the end (delta: 45.1 MB). Free memory was 135.9 MB in the beginning and 110.2 MB in the end (delta: 25.7 MB). Peak memory consumption was 70.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 12 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was analyzing trace of length 15 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 16 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 262.4s, OverallIterations: 172, TraceHistogramMax: 6, AutomataDifference: 151.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2275 SDtfs, 14767 SDslu, 14845 SDs, 0 SdLazy, 10486 SolverSat, 3752 SolverUnsat, 28 SolverUnknown, 0 SolverNotchecked, 62.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4207 GetRequests, 812 SyntacticMatches, 143 SemanticMatches, 3252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16626 ImplicationChecksByTransitivity, 137.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 171 MinimizatonAttempts, 7914 StatesRemovedByMinimization, 170 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 60.7s InterpolantComputationTime, 4148 NumberOfCodeBlocks, 4146 NumberOfCodeBlocksAsserted, 513 NumberOfCheckSat, 3814 ConstructedInterpolants, 8 QuantifiedInterpolants, 391770 SizeOfPredicates, 161 NumberOfNonLiveVariables, 14079 ConjunctsInSsa, 1569 ConjunctsInUnsatCore, 334 InterpolantComputations, 10 PerfectInterpolantSequences, 30/1494 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown